VOGONS


AMD K6 3DMARK, aiming for stars.

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Reply 280 of 289, by Putas

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cyclone3d wrote on 2021-10-10, 16:01:

It could still be something to do with instability. The on-die cache could be catching errors and correcting them.

Can this be prevented by the disabling the "L2 ECC cache checking" option in bios?

Reply 281 of 289, by cyclone3d

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Yeah, and that should theoretically also give a bit of a performance boost as well.

Not sure if that setting is only going to affect the motherboard cache but I'm guessing that that is the case.

Yamaha YMF modified setupds and drivers
Yamaha XG resource repository - updated November 27, 2018
Yamaha YMF7x4 Guide
AW744L II - YMF744 - AOpen Cobra Sound Card - Install SB-Link Header

Reply 282 of 289, by pshipkov

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Thanks for the feedback.
Disabled on-board l2 cache, which basically acts as l3 really.
Same thing.
Something does not add up.

Also, what you mentioned early about videocards slowing down with extreme overclocking.
Can you expand on that ?
Never experienced such thing myself. In fact first time hear about such phenomenon.

retro bits and bytes

Reply 283 of 289, by cyclone3d

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Yeah, some video cards will seem ok at max "stable" overclock but the benchmark scores will go down.

Used to see this mentioned a decent amount in reviews though I don't have any specific ones on hand to point you towards.

Yamaha YMF modified setupds and drivers
Yamaha XG resource repository - updated November 27, 2018
Yamaha YMF7x4 Guide
AW744L II - YMF744 - AOpen Cobra Sound Card - Install SB-Link Header

Reply 284 of 289, by appiah4

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The BIOS may be messing around with the ram timings etc when you call SetMul to change the multiplier, try setting multiplier to 6x and 5x with jumpers etc and run the benchmarks without running SetMul?

Retronautics: A digital gallery of my retro computers, hardware and projects.

Reply 286 of 289, by cyclone3d

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pshipkov wrote on 2021-10-12, 23:55:

mobo has no listed jumpers config for 6x, but with 3 jumpers in place it is probably available. needs to be verified.

2x is 6x for AMD chips.

Yamaha YMF modified setupds and drivers
Yamaha XG resource repository - updated November 27, 2018
Yamaha YMF7x4 Guide
AW744L II - YMF744 - AOpen Cobra Sound Card - Install SB-Link Header

Reply 287 of 289, by pshipkov

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I see.
Ok, jumpering the multiplier produced results that make sense.
So either setmul.exe does something else in addition to adjusting multiplier, or BIOS is quietly trying to be smart about.
Thanks.

retro bits and bytes

Reply 288 of 289, by appiah4

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pshipkov wrote on 2021-10-13, 06:50:
I see. Ok, jumpering the multiplier produced results that make sense. So either setmul.exe does something else in addition to ad […]
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I see.
Ok, jumpering the multiplier produced results that make sense.
So either setmul.exe does something else in addition to adjusting multiplier, or BIOS is quietly trying to be smart about.
Thanks.

Glad to be of help, your problem rang a bell with me as I also use a 2013 in my Socket 7 rig. Cheers.

Also, what was the eventual score with 6x?

Retronautics: A digital gallery of my retro computers, hardware and projects.

Reply 289 of 289, by pshipkov

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Thank you.

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K6-2+/550ACZ @672Mhz (112x6), default voltage
L1/L2/L3 caches enabled
Quadro2 Pro, Detonator3 7.58, graphics perf is CPU bound, OC the video adapter has no effect, moving to later GPUs has no effect.
System feels fully stable (inconclusive), but at 112x6 DRAM/CACHE timings cannot move an inch above their default values in BIOS.
I can get that 3D Mark 2000 number to ~3800 with compromised stability.

112x5.5 with tight cache/ram timings produces 3850 points without compromising stability.
Screenshot in my previous post.

Need to check more thoroughly 124x6 with on-board cache disabled.
3D Mark 2000 number goes to ~4000 - give or take a few.

Looking at the numbers posted around - feels like a slow board.
Still, i kind of like it, but that is my only SS7 experience so far.
What do you think of it ?

retro bits and bytes