Falcosoft wrote:

cyclone3d wrote:

[
The modded bios is to recognize the Barton core. Pretty sure you don't get the extra instructions the Barton has if you don't flash the modded BIOS.

Just a little correction: On one hand the Barton core does not have any new instructions compared to earlier Athlon XP cores (Palomino/ThoroughBred) it only has bigger L2 caches (512 vs. 256). On the other hand BIOS does not even enable SSE since it requires operating system support to preserve XMM register states (that's why SEE does not work by default under DOS/Win95 but requires Win98+). BIOS support is only needed for proper detection/identification of CPU.

Ok, gotcha. The stuff I was seeing from when the mod was made was unclear in that regard. Thanks for the clarification.

@cyclone3d , regarding KT7A-RAID

do you know if this cpu is compatible? with that motherboard after flashing?

http://www.cpu-world.com/CPUs/K7/AMD-Low-powe … L2800DLV4D.html
Frequency ? 2800+ (rated)
2083 MHz (real)
Bus speed ? 333 MHz
Clock multiplier ? 12.5
V core ? 1.5v

its supposed to be unlocked too, a rare version : AXDL2800DLV4D

--

your cpu is:
http://www.cpu-world.com/CPUs/K7/AMD-Mobile%2 … A2800FKT4C.html
Frequency ? 2800+ (rated)
2133 MHz (real)
Bus speed ? 266 MHz
Clock multiplier ? 16
V core ? 1.65V

notice how AXDL2800DLV4D is very rare, it is unlocked, and low power 1.5v
but i dont know if doing your same mod will work with the abit

Cga.8086 wrote:

but i dont know if doing your same mod will work with the abit

I have not tried this CPU myself but in theory making this CPU work on its intended frequency in KT7-A can be more tricky than cyclone3d's Athlon XP 2800+.
Without any mods most likely it would boot and work at 1666 MHz (12.5 * 133). Depending on the number of used RAM modules and applied timings you can overclock the FSB toward the required 166 MHz, but with more than 1 module and tight timings 166 MHz FSB would not be stable. With 3 modules and 2-2-2-6 timings I can get only 144 MHz as rock stable FSB overclock.
The other option is to mod the FID bits (set the topmost 4. bit by opening the corresponding L3 bridge) so you can get 12.5+ multipliers. This way you would lose all multipliers less than 13 in BIOS, and be aware that L3-FID 4. opened this CPU would like to boot at 20x multiplier and that is unlikely to work with a 133Mhz FSB (it could only work if FSB is set to 100Mhz at first boot by default).
In case of no boot problem you should modify other L3 FID bits to get a proper boot time multiplier.
Here you can find a useful table about the FID bits and corresponding multipliers (L3 : SYSCLK Multiplier):
http://fab51.com/cpu/barton/athlon-e23.html:

To raise the multiplier, you need to enable the 5th bit for the multiplier as the KT7A board only supports multipliers 12.5x and below by default.

Connecting or cutting the L bridges is pointless and a waste of time.

You also shouldn't have a problem with it booting at 20x by default. You will just need to set the multiplier via pinmod to something lower.

See here for info.
https://web.archive.org/web/20090106153106/ht … s_reference.htm

Interactive pin mode guide
https://www.ocinside.de/workshop_en/amd_pinmod/

This shows the pins to connect in order to enable the higher multipliers. (just use a single strand of wire in the socket.) - Note: See below in bold
https://web.archive.org/web/20080122042016/ht … unlock/1a.shtml

Then you just go by the interactive pin mod guide and jumper the needed socket pins for the multiplier you want.

EDIT: Finally found the original page I was looking for that explains stuff a lot better and gives a visual guide of exactly what to do.
http://www.emboss.co.nz/amdmults/

Also found a couple more archived pages with some interesting info:
https://web.archive.org/web/20040203040747/ht … Workarounds.htm
https://web.archive.org/web/20031208165459/ht … c/MultiCode.htm
https://web.archive.org/web/20040203040125/ht … ac/ResLogic.htm

OP you have a v1.3. I have two recapped KT7As: a non-RAID v1.3 and a RAID v1.0. The v1.3 non-RAID, with modded BIOS, reads and accepts XP CPUs without wire mods. My v1.0 RAID, with modded BIOS, needs wire mods to run XP CPUs. I chose between an Athlon 2400+ @ 2.0GHz (15@133) and a Barton 3000+ running at 1.73GHz (10.5X133). The Barton at 1.73GHz is just as fast as the 2400+ at 2GHz because of the double amount of cache.

My point is, don't worry about running too high a frequency on this board - you will be bandwidth-starved compared to a 400FSB board that uses DDR. I would try an Athlon XP CPU in your board with modded BIOS only. I'll bet it works without wire mods. The trick is the multiplier can be a PITA to configure right in the BIOS if it's over 12.5, which is I ended up sticking with the Barton 3000+ running at 1.73GHz. Well, that and the power savings and reduced cooling requirement.

EDIT: Found an old thread that Imperious provided some valuable info in regarding this. Highly recommend you read it.

Abit KT7A and Geforce 6600GT compatibility

I was finally able to find an athlon xp-M processor near my area
but its this one:

Mainstream
Athlon XP-M "Barton" (Socket A)
Athlon XP-M 2800+ 2133 MHz 512 KB 266 MT/s 16x 1.55 V 45-53 W AXMJ2800FHQ4C

i wonder if it will work or not with the bios mod and pin mod, as the voltage of the cpu is 1.55v