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How would an Athlon CLASSIC run with the L2 turned off?

WHOA, WHOA, WHOA....HOLD EVERYTHING...Just tried it - it runs the same as before!!! WHA...? I ran SiSOft Sandra 2000 on it with it both on and off the scores were IDENTICAL!!!

With L2 cache on:
2333MIPS
1007MFLOPS

With L2 cache OFF:
2343MIPS
1009MFLOPS

!!!!!!!!Hardly any difference!!! Could make overclocking easier!!! Did I just stumble onto something here?
 
Well if Sandra shows no real difference then I'm wondering if the L2 is really turned off or the bios control isn't working....?
You would think there should be a big drop in performance, try running UT or Q3 ect. for comparison maybe CPUID see if they agree with the bios.
 
IF the BIOS control wasn't working, why would the scores be different, albeit small? I don't have WCPUID 🙁
Ill have to get it..
 
Ok, I got WCPUID (ver. 2.8) and it is indeed showing that the L2 is turned off, showing it as "0K". Wow!!! The real reason this could be significant is for overclocking, don't have to worry about funky L2 cache dividers without losing performance. Anyone have any other explanations?
 
turning off L2 cache basically defeats the purpose of overclocking. I dont see how you have it turned off and are getting the same scores.

Have you tried any games like Q3? You probably will see a drop in performance.
 
Ok, I've got the AMD CPUID and it also shows the L2 turned off, showing all the values at "0". I don't have an explanation other than maybe that funky 2/5 cache divider was hurting the Athlon at the higher speeds such as mine.
 
Have you tried it with L2 turned on? I think it gave me the same results. The BIOS of the K7M that I have lets me turn off L2 but it doesn't work, as mentioned above, unless you disable L1 as well. I think this is the case with many motherboards. I have been looking in to this for quite some time, as turning off L2 would enable me to boot up at a higher frequency an then enable L2 with a lower multiple through an L2 proggie. However, these proggies doesn't enable L1 and hence it's been to no use so far. Now i'm eagerly awaiting a proper BIOS release (or I could venture with soldering...).

This topic has been discussed several times at the BBS at amdzone. If you find a solution, please post back!



 
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