K6-2+/K6-III+ Compatibility List

K6-2+/K6-III+ CPU System And Motherboard Compatibility List

List assembled and maintained by King V

Many many thanks to the various members who post to the forums of K6 Plus! as well as AMD Zone for their input, without whom this list would NOT be possible.

In particular, Gizmic and Theory240, from whose work a good portion of this list came in the beginning.
Special thanks to Jan Steunebrink for creating the various patched BIOSes to work on some of the motherboards that might not otherwise correctly support the K6 mobile processors. See: The Unofficial AMD K6-2+ / K6-III+ page

Last updated: 3/10/2005 by King V

View Changelog

Form Factor: Note that "Baby AT+ATX" indicates a Baby AT board that also has an ATX type connector.
Chipset: I believe that Sis 530 is the same as SiS 530+5595, ie: all 530s use a 5595 as well.
Max FSB: Maximum supported Front Side Bus setting in MHz. Note that if there are two numbers separated by a slash, the first is the maximum officially supported FSB, and the latter is a higher speed known to exist but not documented, and therefore not absolutely guaranteed to work in all cases. Furthermore, most FSB settings over 100MHz on Super 7 boards are not guaranteed, success at using them is questionable, and may require additional steps such as disabling on-board cache, even if the speed is officially listed in the manual.
Board Rev: Earliest Known revision of this motherboard that supports the K6 mobile CPUs as stated. Note that if there are major differences in how different revisions of the board support the CPU, they will be listed separately (example: the BCM VP1541)
BIOS Req'd: Earliest Known version of the BIOS that will work correctly with this board for mobile K6 CPU support. You can generally assume that later revisions of the board or later BIOS versions than shown will work, unless otherwise noted.
Wrong POST: If the system in the POST screen seriosly misidentifies the CPU, a Y will be marked here. This is for example if the system calls a K6-III+ a 486, or say a "-MMX", or something equally strange. If the system merely omits the + sign, or shows the wrong speed (regardless of whether the system actually runs at the correct speed), then this column will be marked N. That is, this is to make sure the general TYPE of CPU is correct.
Clk Util Req'd: If the board for some reason will not allow you to set the processor its correct speed, and a software utility is needed to set the clock speed of the CPU properly, this column will be marked Y. (ie: a K6-III+ 450 CPU will only run at 350 at most despite having the correct jumper settings)
Feat Util Req'd: This column will be marked Y if separate software is needed to correctly set up the features of the processor, such as Write Allocation, and Speculative Write Ordering settings.

Model	Chipset	Form Fact	Max FSB	Board Rev	BIOS Req'd	Wrong POST	Clk Util Req'd	Feat Util Req'd	Notes
Abit
TX5				?	?	Y	?	?	Must disable "Speed Error Hold" in BIOS
Acer
V75M	SiS 530+5595	Micro ATX		?	?	Y	N	Y	US part of website doesn't seem to have a reference for this motherboard. German site for Acer has been recommended.
A-Trend
ATC-5220	VIA MVP3	ATX	100?	All	2.01a	N	N	N	Must use BIOS with filename 5220201a.bin. Rumored to be available from the A-Trend website, but I have been unable to find it there. It is also available at The Unofficial AMD K6-2+ / K6-III+ page
Amptron
BKMVP4				?	1.08 ??	?	?	?	Not sure on BIOS version requirement.
PM-9100A	?	?	?	?	?	?	?	?	A patched BIOS is coming soon. This board is the same as the PC Chips M571 v3.2a and uses the same BIOS.
PM-9100C				5.0	Patched	N	N	N
PM-9900	VIA MVP3			?	Patched	N	N	N	Board uses the same BIOS as the PC Chips M577.
AOpen
AP5T	?	?	?	?	Patched	N	N	N
AX59 Pro	VIA MVP3	ATX	124	2.33	2.35	N	N	N
AX5T	?	?	?	?	Patched	N	N	N
MX59 Pro	VIA MVP4	Micro ATX		?	1/28/00	?	?	?
MX59 Pro II	VIA MVP4	Micro ATX		?	1/28/00	?	?	?
Asus
P5A	ALi Aladdin V	ATX	120 / 133	1.04	1011 beta4	N	N	N	1.05 and later board revs will NOT work. Perhaps the 1011 beta 2 BIOS might work as it does on the P5A-B. The beta 4 BIOS has been seen at the German Asus site. Need CPUFSB or similar software to attain 133MHz FSB. Beta 4 BIOS at theGerman Asus FTP site. (note that the beta 4 BIOS isn't there anymore, now there's a beta 5? Does that version still work with the K6-2+ and K6-III+ chips correctly?)
P5A-B	ALi Aladdin V	Baby AT		1.03	1011 beta2	N	?	?	Beta BIOS. Available at the German Asus FTP site. Board revs after 1.04 generally will not work. NOTE: I have a report of someone successfully using a K6-III+ 450 overclocked to 550 MHz in a 1.06 revision of this board. POST identifies the cpu as a 550MMX.
P/I-P55T2P4 P/I-XP55T2P4	Intel 430HX	Baby AT		3.0^*	Patched	N	N	N	^*P/I-XP55T2P4 V1.3 doesn't work with K6-2+, but later versions should be okay. Undocumented voltage settings for these boards are noted here
P/I-P55T2P4S				?	Patched	N	N	N
P/I-P55TVP4				?	?	?	?	?	A Patched BIOS is coming soon.
P5S-B P5-99B				?	Patched	?	?	?
P5S-VM P5-99VM				?	Patched	N	N	N
SP97-V	SiS 5598	Baby AT+ATX		?	Patched	N	N	N	Undocumented voltage settings: 2.2V VID0=2-3, VID1=1-2, VID2=2-3 2.3V VID0=1-2, VID1=1-2, VID2=2-3 2.4V VID0=2-3, VID1=2-3, VID2=1-2
SP97-XV	?	?	?	?	Patched	N	N	N
SP98AGP-X	?	?	?	?	Patched	N	N	N
SP98-N	?	?	?	?	Patched	N	N	N
TX97	Intel 430TX	Baby AT+ATX	83	1.04	Patched	N	N	N
TX97-E	Intel 430TX	Baby AT+ATX		1.04	Patched	N	N	N
TX97-L	Intel 430TX	?	?	?	Patched	N	N	N
TX97-LE	Intel 430TX	?	?	?	Patched	N	N	N
TX97-X	Intel 430TX	?	?	?	Patched	N	N	N
TX97-XE	Intel 430TX	ATX	83	3.01	Patched	N	N	N
TXP4	Intel 430TX	Baby AT+ATX		1.04	Patched	N	N	N	Report indicates the K6-2+ will work with rev 2.0 of this board. Perhaps earlier board revs as well?
TXP4-X	Intel 430TX	?	?	?	Patched	N	N	N
VX97	Intel 430VX	Baby AT		?	Patched	N	N	N
Azza
PT-5SMT	SiS 530			1.2	5smt.bin	N	Y	Y	BIOS is dated 7/5/2000
PT-5VMD				?	5vmd.bin	N	N	N	BIOS is dated 9/27/2000
PT-5VML	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
BCM
IM5598	?	?	?	?	Patched	N	N	N
SQ575	Intel 430TX	Baby AT	75	D01	A06	Y	N	Y	POST will ID chip as -MMX CPU at 66MHz. Rev D01-D03 have jumpers for 2.1V core. Rev F01 and up have 2.2V core minimum. Revisions prior to D01 have 2.8V core minimum. Are there any undocumented settings lower than these for any revision?
VP1541	ALi Aladdin V	ATX	100	A01	1.08	N	Y	?
VP1541	ALi Aladdin V	ATX	100	A02	1.08	?	N	?
BioStar
M5ATA	ALi Aladdin IV+	Baby AT	83	1.0	ATA1125B	Y	N	Y	Later BIOS will NOT work! Can support 2.0V if you have 8-pin (4 jumper) block for voltage. Requires these modifications if you have the 6-pin (3 jumper) block for voltage.
M5ATD	?	?	?	?	Patched	N	N	N
M5SAF	?	?	?	?	Patched	N	N	N
M5SIB	?	?	?	2.0	?	?	?	?	A patched BIOS is coming soon.
Chaintech
5AGM2	VIA MVP3	Baby AT		?	5agm2b02	?	?	?	BIOS dated 11/2/99.
5ATA2	?	?		?	5ATA0A15	?	?	?	BIOS dated 11/2/99.
5IFM0	?	?	?	?	Patched	N	N	N	The patched BIOS adds support for the original K6-2 and K6-III as well as the K6-x+ processors. Due to the limitations of the linear Vcore regulator on this board, a CPU upgrade adapter is needed to run the K6 series CPUs on this board.
5IFM1	?	?	?	?	Patched	N	N	N	The patched BIOS adds support for the original K6-2 and K6-III as well as the K6-x+ processors. Due to the limitations of the linear Vcore regulator on this board, a CPU upgrade adapter is needed to run the K6 series CPUs on this board. There is also a modification procedure described on this page (in German).
5RSA0	?	?	?	?	Patched	N	N	N
5RSA2	?	?	?	?		?	?	?	A patched BIOS is coming soon.
5SIM	?	?	?	?	Patched	N	N	N	The patched BIOS also adds better support for the K6-2CXT and K6-III CPUs.
DFI
586IPVG	?	?	?	?	Patched	N	N	N
P5BTX/L	Intel 430TX	Baby AT	83	B+	July 1998	Y	N	Y	ID's the K6-x+ procs as -MMX CPU 66MHz. See manual addendum file for 75 and 83MHz FSB settings. Not all voltage settings documented, but supports 2.0V to 3.5V core in 0.1V increments.
P5BV3	VIA VP3	Baby AT+ATX	75	A+	9/4/98	Y	?	Y	Not the same as the P5BV3+. For 2.0V core, set JP5 to 1-2 and SW7, SW8, SW9, and SW10 all to OFF. Some stability problems have been reported using 75MHz FSB.
P5BV3+	VIA MVP3	Baby AT	100	ALL	11/3/98	Y	?	Y
K6BV3+/66	VIA MVP3	Baby AT+ATX	100	B+ and BB+	4/12/2000	N	N	N
K6XV3+/66	VIA MVP3	ATX	100	BB+	4/12/2000	N	N	N	Previous BIOSes may also work.
DTK
PAM0052V	VIA MVP3	Baby AT+ATX	100	?	V1.12	N	N	N
ECS / Elitegroup
P5TX-B Pro	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
P5SD-B	SiS 5591 / 5595	Baby AT+ATX	100^*	1.1A	2.3a	Y	?	?	A Patched BIOS is coming soon.^*Some boards have a clock chip that doesn't support 100MHz FSB, but those with 100MHz FSB support are unstable or won't even POST when set to that speed. ONLY 2.3a or earlier BIOS. Do NOT use later versions. Some report that they have gotten this board to work with the + procs, my system will POST but won't boot. 2.3c will ID the CPU as "Unknown-S" but will not finish POST. Earlier revisions of the board only use 1.x BIOS versions, and I assume that these earlier ones have the clock chip that does NOT support 100MHz FSB. This board is NOT the same as the P5SD-B+. A patched BIOS is coming soon.
P5SD-B+	?	?	?	?	Patched	N	N	N
P5SS-Me	?	?	?	?	Patched	N	N	N
P5TX-B Pro	?	?	?	?		N	N	N	A patched BIOS is coming soon.
EFA
P5MVP3-AT	VIA MVP3?	Baby AT?	?	?	Patched	N	N	N
Epox
EP-58MVP3C-M	VIA MVP3	Baby AT+ATX		0.5	4/11/00	N	N	N	Boards rev 1.0 and below do not have 5.5 multiplier. Owner of a 0.5 rev of the board says overclocking is difficult because the board can't provide enough current.
EP-MVP3C	VIA MVP3	Baby AT+ATX		?	?	N	N	N
EP-MVP3C2	VIA MVP3	Baby AT+ATX	112^*	1.1		N	N	N	^*There are only jumper settings for 112MHz FSB, but the BIOS also allows 124 and 133MHz. Any reports of getting it to boot successfully with those FSB speeds?
EP-MVP3G2	VIA MVP3	ATX		?		N	N	N
EP-MVP3G5	VIA MVP3	ATX		?		N	N	N
EP-MVP3G-M	VIA MVP3	ATX		?	?	N	N	N	2 Meg BIOS chip required. Set BIOS caching to disabled.
FIC
PA-2007				?	1.13cd15	Y	?	Y
PA-2013	VIA MVP3	ATX	124	2.0^*	JI4330	N	N	?	^*E-O036, also 2.1 and later. Also JI4333 BIOS. See FAQ under Support at the Taiwan English website. Known to POST 600MHz as 556, but system actually runs 600.
VA-503+	VIA MVP3	Baby AT	124	?	JE4330	N	N	N	Also JE4333 BIOS. See FAQ under Support at the Taiwan English website. Known to POST 600MHz as 556, but system actually runs 600.
VA-503-A				?	JN4116	N	N	N	Beta BIOS. See FAQ under Support at the Taiwan English website.
Freeway
FW-TI5VGF				?	beta ti5vgfh7	?	?	?
Gainward
5S3A	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
5VPA	?	?	?	?	Patched	N	N	N
Gigabyte
5SG-100	?	?	?	?	Patched	N	N	N
GA-586ATX3	Intel 430TX	ATX	66 (?)	?	?	?	?	?	It is believed that this is identical to the GA-586TX3 below except that it is ATX form factor.
GA-586TX2	Intel 430TX	Baby AT+ATX	66 (?)	2.03	?	Y	N	Y	Use latest BIOS from Gigabyte. Confirmed working with a K6-III+ 450 (at 400). http://www.rom.by has a patch to enable full recognition and all features of the K6-2+/K6-III+, and 128GB hard drive support. The site is in Russian. There is an English translation, but the patcher on the English version of the page is outdated.
GA-586TX3	Intel 430TX	Baby AT+ATX	66 (?)	?	2.1	Y	N	Y	Does this board support greater than 66MHz bus? 6.0 x 66 usage confirmed successful.
GA-5AA	ALi Aladdin V	Baby AT	140	2.2	f3 and f6	N	N	?	2.2 version works with f6 BIOS, 3.2 known to work with f3 and f6 BIOS. Do earlier board revs work also?
GA-5AX	ALi Aladdin V	ATX	140	4.1	f3	N	N	N
GA-5SMM	SiS 530+5595	Micro ATX	133	?	f3	N	N	N
IWILL
XA100Plus	?	?	?	?	32211A	?	?	?
J-Bond
PCI500C-pa	?	?	?	?	?	?	?	?	A patched BIOS is coming soon. Same board as Vigor VG5C-Pa.
Jetway
J-542C J-542CS	ALi Aladdin V	Baby AT	100	all	Patched	N	N	N
Lucky Star
5MVP3	VIA MVP3 (?)	Baby AT	100	?	?	?	Y	?	MFR website appears to be very unreliable. Should use 3x multiplier then software to speed up a K6-III+ cpu.
5VP3	?	?	?	?	Patched	N	N	N	Is this the same as the 5MVP3?
Lucky Tech (Shing Yunn Enterprises)
P5MVP3	VIA MVP3 (?)	?	?	?	?	?	?	?
P5MVP4	?	?	?	?	Patched	N	N	N
M-Tech
M-549	SuperTX (VIA VPX)	Baby AT	75 / 83	?	Soyo^*	N	N	?	^*Use the 1b1 BIOS for the Soyo 5EAS board. 83MHz FSB undocumented, use JP10=2-3, JP11=1-2, JP12=1-2
MSI
5169	ALi Aladdin V	ATX	100	2.1	?	N	N	Y	2.1 version of the board doesn't work with the latest BIOSes because the BIOS ROM chip size is too small. Use either "optimum" or "fail safe" settings or system will be EXTREMELY slow. Most BIOS settings reported to have little to no effect. Use of cacheonw.exe needed. ALi Northbridge and Southbridge drivers and AGP utility should be used as well.
5169	ALi Aladdin V	ATX	100	4.0 (2.0??)	3.5	N	N	N	BIOS 3.3 or 3.4 might work, but 3.7 will NOT WORK. Only compatible if clock generator (near the AGP slot) has number 82ICS9248-131. A user has reported that the ICS 9248BF-131 clock generator will also work with the + procs. Perhaps they're the same, perhaps the former is needed for 97MHz bus speed compatibility. Version 2.0 reported to work with these processors as well, but unknown whether the Feature utility would be needed.
MS-5172	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
5182	ALi Aladdin V	Micro ATX		1.0	1.4	Y	N	Y	Can't enable L2 cache in BIOS, must use cacheonw.exe. Some issues have been reported whereby going into the BIOS (even making no changes) "kills" the L2 cache, which seems to be cured by putting in a K6-2, booting, shutting down, then putting a K6-III+ back in.
5184	VIA MVP3	Baby AT+ATX	133	?	1.3 beta 3	N	N	N	If the BIOS isn't available from MSI's web site, it can be downloaded from The Unofficial AMD K6-2+ / K6-III+ page
Matsonic
MS6260S		Baby AT+ATX	100	?	62601026	?	?	?
MS6261	ALi Aladdin V	Baby AT+ATX	100	?	?	N	N	?
Micronics
C200	ALi Aladdin V	ATX	100	A01	BCM^*	?	?	?	^*Use the 1.08 BIOS for the BCM VP1541 A01 board.
PC Chips
M571	?	?	?	3.2a	?	?	?	?	A patched BIOS is coming soon. This board is the same as the Amptron PM-9100A and uses the same BIOS.
M571	?	?	?	7.0	?	?	?	?	A patched BIOS is coming soon.
M572	?	?	?	?	Patched	N	N	N
M575	?	?	?	?	Patched	N	N	N
M577	VIA MVP3			?	Patched	N	N	N	Board uses the same BIOS as the Amptron PM-9900.
M585LMR		Baby AT+ATX		3.1 ver 1.2	3/10/2000s	?	?	?	Can newer BIOS be used?
M590	?	?	?	?	Patched	N	N	N
M598	SiS 530	Baby AT+ATX		5/7/8/9	M598LMR^*	?	?	?	^*Use ONLY the 2k0519 BIOS from the M598LMR to get the M598 to support the K6-2+ and K6-III+ processors. Later BIOS versions will NOT work. Report from the field indicates that the CPU plug-N-play auto-voltage setup will set a K6-2+ to 2.2V, so the user must enter 2.0V manually.
M598LMR	SiS 530	Baby AT+ATX		1.x	2k0519	?	?	?	Will the 2k1222 also work?
M598MR	SiS 530	Baby AT+ATX	100	1.3B	2k0519	N	N	?	Success reported with K6-III+ 400. Setup in BIOS reported to switch x.0 and x.5 multipliers on the K6-III+ processors, such that setting the CPU speed to x50 runs it at x00, and setting it to x00 runs at x50. Thus BIOS setup shows the speed incorrectly, and POST reports it correctly.
M599LMR	SiS 530	Micro ATX		?	2k0913s	N	N	N	Might misidentify speed (ie: 600 shows up as 550), but will run at 600 if that's what the CPU is set for.
PCPartner/Vtech
VIB823DS with LGS I/O chip	?	?	?	?	Patched	N	N	N	This Patched BIOS CANNOT be used with the same model board that has the ITE I/O chip.
VIB878DS with ITE I/O chip	?	?	?	?	Patched	N	N	N	This Patched BIOS CANNOT be used with the same model board that has the SMC I/O chip.
QDI
Titanium IB+	?	?	?	?	Patched	N	N	N
Titanium IIB	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
Titanium IIIB	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
RedFox
AGP-ALI	?	?	?	?	Patched	N	N	N
Shuttle
HOT-569	?	?	?	?	Patched	N	N	N	The patched BIOS also adds better support for the K6-2CXT and K6-III CPUs.
HOT-569A	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
HOT-571	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
HOT-591P	VIA MVP3	Baby AT	100	?	Patched	N	N	N
HOT-597	?	?	?	?	5970S02Z	?	?	?
HOT-603	?	?	?	?	Patched	N	N	N	The patched BIOS also adds better support for the K6-2CXT and K6-III CPUs.
Soltek
SL-56G1 SL-56G2 SL-56G5	VIA MVP3	ATX	133	?	Z3	N?	N?	N?	Support is assumed because the BIOS version officially states support for the AMD K6-2+. Support for K6-III+ unknown, but manual does state K6-III support. WARNING: No reports from the field have been received yet for these boards! I am assuming compatibility due to the notes for the BIOS and the correct 2.0V I/O support.
SL54U5	VIA MVP3	Baby AT+ATX	133 / 150	A8	A10	N	N	?	Need cpufsb or similar software to increase FSB to 150. Earlier board revisions might work, but A8 is confirmed to work. Feature utility probably not required because BIOS officially supports K6-2+.
Soyo
5EAS		Baby AT	75 / 83	?	1b1	N	N	?	83MHz FSB undocumented, use JP10=2-3, JP11=1-2, JP12=1-2
5EHM	VIA MVP3	Baby AT+ATX	124	1.0/1.1^*	EH-1DA1	N	N	N^*	BIOS filename is 5EH1DA1.bin and is dated 6/5/2000. K6-2+ reported successful. ^*NOTE: Pre 1.0 versions of the board reported to work, but Write Allocate must be set manually.
5EHM	VIA MVP3	Baby AT+ATX	100/112	1.2/1.3	EH-1DA2	N	N	N	This version of BIOS reported to be only for 1.3. Can we get a confirmation of compatibility with K6-2+ and K6-III+, and which BIOS the 1.2 is supposed to use?
5EMA+	VIA MVP3	ATX	124	1.0	5empvea1	N	N	N
5SSM 5SSM/5	SiS 530	Micro ATX	133	All	?	N	N	N	Assuming complete compatibility because the manual for this board specifically states support for the K6-2+ 450. Reports from users indicate excellent support of the K6-III+.
5XBM				?	?	Y	?	?	Turn off BIOS caching.
SuperMicro
P5MMS2 P5MMS98	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
Superpower
SP-586TB	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
SP-A586B	?	?		?	VER:A.9	?	?	Y	This BIOS supports the K6-x+ processors but doesn't turn on Write Allocation for any K6.
Tekram
P5M3-A+	VIA MVP3	ATX		?	Patched	N	N	N
P5M4-B	VIA MVP4	?	110	?	Patched	N	N	N
P5M4-M	VIA MVP4	?	110	?	Patched	N	N	N
P5M4-M+	VIA MVP4	?	110	?	Patched	N	N	N
P5MVP-A4 (1Mb)	?	?		?	?	?	?	?	A patched BIOS is in beta testing.
P5MVP-A4 (2Mb) P5MVP-B4	?	?		?	Patched	N	N	N
P5T30-B4	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
P5T30-B4E	?	?		?	Patched	N	N	N
P5VP3-B3	?	?		?	Patched	N	N	N
TMC
AI5VG+ (1Mb BIOS)	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
AI5VG+ (2Mb BIOS)	VIA MVP3	Baby AT+ATX	100	?	Patched	N	N	N
AI5VP	VIA VPX	Baby AT	75 / 83	1.00	?	Y	N	?	This board supports core voltages from 2.0 to 3.5 83MHz FSB undocumented, set SW2 5-7 as On, Off, Off, and set SW2 8 as On for Async mode. Note that while 83MHz seems to work, POST screen and bootup is blank, although once Windows starts up the system works fine. Shutting down results in a blank screen again.
TI5VG+	?	?	?	?	Patched	N	N	N	This Patched BIOS is only for boards with a 2Mbit (256KB) flash chip.
TI5VGA				1.00	E3	?	?	?	E3 BIOS is dated 2/9/00.
TI5VGF				1.00	*	?	?	?	^*This board is the same as the Freeway FW-TI5VGF and must use the Freeway board's beta BIOS number ti5vgfh7 from the Japanese Freeway site. With this BIOS, the board is reported to work with the K6-2+ at 500 and 550MHz. Same report indicates it's safe to ignore the incompatible hardware warning when the Freeway BIOS is programmed into the TMC board.
Trigem
Delhi III	VIA MVP3	Micro ATX		?	Patched	N	N	N	This board can be found in some eMachines systems. Disable L2 cache in BIOS and run cacheonw.exe from autoexec.bat. Settings exist for 5.5x multiplier (J11=1-2, J12=1-2, J13=2-3) and 2.0V (sw1, sw2, sw3, sw4 all set to OFF). More info for eMachines tweaking at eMachine Upgraders Yahoo club
Tyan
S1563S	Intel 430HX	Baby AT	?	?	?	Y	N	Y	Undocumented setting for 2.1V exists. Running a K6-III+ at 66 x 6 and 2.1V reported to have the voltage regulators running at 95% of their capacity. Having a fan blow across the regulators has been suggested.
S1564	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
S1571	Intel 430TX	Baby AT	75	?	Patched	N	N	N	Baby AT version of the S1573. The patched BIOS also adds better support for the K6-2CXT and K6-III CPUs.
S1573	Intel 430TX	ATX	75	?	Patched	N	N	N	ATX version of the S1571. The patched BIOS also adds better support for the K6-2CXT and K6-III CPUs.
S1590	VIA MVP3	Baby AT	100	?	Patched	N	N	N	2.1V on all versions, 5-jumper version needed for 2.0V operation. Multiplier jumpers JP-8, JP-9, JP-10 undocumented settings: On, Off, On for 2x, Off, Off, On for 5.5x
S1592	?	?	?	?	?	?	?	?	A Patched BIOS is coming soon.
S1598 S1598C2	VIA MVP3	ATX	100	?	1.06c 1.06e	N	N	N	The S1598C2 is the version with 2MB of L2 cache. BIOS version 1.06e is a Beta BIOS from Tyan and is supposed to have better Windows 2000/XP support.
Vigor
VG5C-pa	?	?	?	?	?	?	?	?	A patched BIOS is coming soon. Same board as J-Bond PCI500C-Pa.
Vision Top
S7-MVP3	?	?	?	?	Patched	N	N	N

OEM System Compatibility List for K6-2+ and K6-III+ CPUs

This section will become a bit cleaner as time progresses.
If anyone can confirm the compatibility of the K6-2+ and K6-III+ processors with OEM systems, please let me know!

Column headings have the same meaning as in the motherboard list above, except:

Volt Convt Req'd: If marked Y, then this system does not support the voltage required for the mobile K6 processors, and a voltage converter such as Powerleap's adapter or a similar device, is required.

Model	BIOS Req'd	Wrong POST	Clk Util Req'd	Feat Util Req'd	Volt Convt Req'd	Notes
Compaq
Presario 1246 Presario 4540		?	?	?	Y	Clock and feature utilities are likely needed, but this isn't known for sure yet
Presario 1270		Y	?	?	?	System will identify processor as K5 on bootup.
Presario 5070 Presario 5184 Presario 5185	686U1	N	N	N	N	These models use the same motherboard, made by AZT. Documented voltage settings go to 2.1V. Possible wrong POST over 500 or 550 MHz. Looking for undocumented jumper settings, though some serious digging at Compaq's site may turn up some useful settings.
Presario 5190 Presario 5202 Presario 5203 Presario 5204 Presario 5221 Presario 5222 Presario 5225 Presario 5240 Presario 5242 Presario 5245 Presario 5248 Presario 5250 Presario 5253		?	?	?	N	Presario 5222 confirmed to work with K6-2+ and latest BIOS. Presario 5240 confirmed to work with K6-III+.
Presario 5220	10/19/1999	N	N	N	N	Is it possible that this would apply to all the boards in the entry above as well? The 5220 used to be listed together with them.
Presario 5330 Presario 5333 Presario 5340 Presario 5345 Presario 5360 Presario 5363 Presario 5365		?	N?	N?	N	Reports are that feature and clock utilites are not needed, but these reports are UNCONFIRMED! I have a CONFIRMED report of the K6-III+ 550 working on the Presario 5345.
Presario 5410 Presario 5423 Presario 5440 Presario 5441 Presario 5451 Presario 5460 Presario 5461 Presario 5465	Gigabyte^*	N	N	N	N	^*These machines use the Gigabyte GA-5SMM motherboard. Use the f3 BIOS from Gigabyte. Unknown whether these processors will work fully without the f3 BIOS.
Presario 5710		?	?	?	?
e-Machines
All with K6-2		?	?	?	?	Some need feature and/or clock utility. More info for eMachines tweaking at eMachine Upgraders Yahoo club
HP
		?	Y	Y	?	One tested so far . . model number upcoming.
IBM
2170-xxx		Y	N	N	Y	Uses the Acer V75M motherboard. See motherboard section above for further details. Updated BIOSes should be available at IBM's website.
All others		?	Y	Y	?	Most, but not all, socket 7 based IBM PC can use the K6-2+ and K6-III+ procs if the low voltage settings are available, though most need feature and/or clock utility, and some require a voltage converter. Starting off with 3.0x multiplier helps if higher ones won't initially work, then use the clock utility.

Laptop Compatibility List for K6-2+ and K6-III+ CPUs

If anyone can confirm the compatibility of the K6-2+ and K6-III+ processors with laptops, please let me know!

Model	Wrong POST	Clk Util Req'd	Feat Util Req'd	Notes
Chicony
MP983	N	N	Y	Max FSB is 66. At 400MHz (6.0 x 66) the speed may be misidentified, but it is actually running at 400MHz. This computer is also known as: AMD Tech TravelPro 2500 EPS MP938 Chembook MP983 Inveta MP983 as well as maybe 20 other brands worldwide. A Patched BIOS is coming soon.
Compaq... also see Mike's PC / Laptop Homepage for info on the Compaq 1200/1600 series.
12XL125 1200XL125	N	N	N^*	Came from the factory with a K6-2+ 533MHz. ^*Can use CTU or other utilities to enable Write Combines, but Write Allocation is set correctly by BIOS.
All 16xx	?	N	?	Reported as 100% compatible with the K6-III+. Reports say that the K6-2+ works on the 1685, but requires Feature Utility. Very likely this applies to all 16xx computers.
Presario 1600s	Y	N	?	Reported compatible with the K6-2+. System mis-identifies the CPU as a K5.
Presario 1685	Y	N	?	Reported compatible with the K6-2+. System mis-identifies the CPU as a K5.
Presario 1690	?	N	?	Reported compatible with the K6-III+.
Presario 1692	?	N	?	Reported compatible with the K6-III+.
Presario 1694	Y	N	?	Reported compatible with the K6-2+. System mis-identifies the CPU as a K5.
e-Machines
All with K6-2	?	?	?	Laptops originally equipped with K6-2 can use the mobile processors. More info for eMachines tweaking at eMachine Upgraders Yahoo club