Comos Posted August 23, 2012 Share Posted August 23, 2012 Hi everyone,this thread is a little bit retro, but I can't figure out where is the problem.I recently run my older PC with ASUS TX-97-X which has patched BIOS to support AMD K6 CPU's.Most of the time I run a K6-III 400 clocked @ 412Mhz (5.5x75).Somehow this one didn't run stable at 450.Half year ago I got a few AMD K6-III+ 400.When I install this CPU, I clocked it to 450 (6x75), runs stable, but when tested quickly in MPXPLAY, the CPU load is about 2-3% higher then I had with K6-III which was clocked even lower !The tools that runs under DOS to get max from this CPU I run all the time, but what could be the problem? The stepping of the CPU or the PowerNow! feature is throttling the performance? Link to comment Share on other sites More sharing options...
submix8c Posted August 23, 2012 Share Posted August 23, 2012 http://www.cpu-world.com/CPUs/K6-III/index.htmlHave you tried clocking at 5.5x (the lower)?Hmmm. according to the above, you might have a K6-IIIE+ (different FSB) @4x100. And you didn't mention whether the K6-III was 66 or 100 FSB.Bus speed matters. IMHO it's better to go a higher FSB than a higher multiplier (which depends on the CPU and the MoBo abilities). IOW, choosing a "slower" CPU that uses a higher FSB MIGHT run faster - or even an "equivalent" speed (as you might have). Link to comment Share on other sites More sharing options...
Comos Posted August 23, 2012 Author Share Posted August 23, 2012 http://www.cpu-world.com/CPUs/K6-III/index.htmlHave you tried clocking at 5.5x (the lower)?Hmmm. according to the above, you might have a K6-IIIE+ (different FSB) @4x100. And you didn't mention whether the K6-III was 66 or 100 FSB.Bus speed matters. IMHO it's better to go a higher FSB than a higher multiplier (which depends on the CPU and the MoBo abilities). IOW, choosing a "slower" CPU that uses a higher FSB MIGHT run faster - or even an "equivalent" speed (as you might have).I have tried once only to test if the mobo will bootup with K6-III+, then I set it to 6.0x.The previous K6-III was AMD-K6-III/400AFR.Now the AMD K6-IIIE+ 400 - K6-III+/400ATZ.Seems you are right about the FSB as I checked both CPU's.On both the 75Mhz remained in my setup. Link to comment Share on other sites More sharing options...
dencorso Posted August 23, 2012 Share Posted August 23, 2012 Did you visit Jan Steunebrink's Getting the AMD K6-2+ / K6-III+ to work on your Super Socket 7 board page? Link to comment Share on other sites More sharing options...
submix8c Posted August 24, 2012 Share Posted August 24, 2012 Ouch!According to Rev.3.0 MoBo manual that's the best you'll get - Voltage 2.1v / 6x75mhz=450mhz. Sad... I dumped 2 Tyan S1590's recently for recycle. If I'd still had them, I would have gladly given you one (gratis). Link to comment Share on other sites More sharing options...
Comos Posted August 24, 2012 Author Share Posted August 24, 2012 Did you visit Jan Steunebrink's Getting the AMD K6-2+ / K6-III+ to work on your Super Socket 7 board page?Sure, I had a long chat with Jan about the patching and had a last custom patch installed. Link to comment Share on other sites More sharing options...
Comos Posted August 24, 2012 Author Share Posted August 24, 2012 Ouch!According to Rev.3.0 MoBo manual that's the best you'll get - Voltage 2.1v / 6x75mhz=450mhz. Sad... I dumped 2 Tyan S1590's recently for recycle. If I'd still had them, I would have gladly given you one (gratis).The official MoBo manual doesn't tell all the secrets.I tested all combinations and the lowest volatge I can get is 2.0V.To get 450Mhz is fine for me,but not with less CPU power that I had before,which disappoints me.I have a revision v2.3, the board I have fixed with newer and stronger FET's to handle newer CPU's.Interesting is, that there are other types like TX97-E which supports also 83Mhz FSB, look similar like T97-X but on T97-X that FSB combination doesn't work.Dunno why Asus didn't impletent it to the T97-X which seemed was the last in their series with Triton II chipset. Link to comment Share on other sites More sharing options...
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