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Minimum FPS better at slower GPU clock.

V

Varmint

[H]ard|Gawd
Joined
Apr 10, 2006
Messages
1,854
I posted this here cause I'm going to upgrade to Socket 775 next week, but thought it's interesting that if I underclock my 260, my minimum FPS actually goes up.
I thought CPU bottlenecking just limited your gains, not actually reduced them.

This is Crysis GPU bench, all high, 4xAA, 1680 x 1050.

For reference my 8800GTS was 15.3 min, 24.3 avg, though at 0xAA.

crysisgpubenchxx3.jpg
 
Its interesting, for a second there i was lazy and did not read min frames, similar thing happened to me where if i overclocked core and or shaders too much i will loose frames, yet gain when its slower while linked.

Interesting results :cool:
 
Yes, CPU bottleneck does that. Your minimum frame rates will drop even more if you were to go SLI. Try increasing the resolution or AA. You might notice them going up.

Speaking of CPU bottleneck, I thought I should share My PC benchmarking and Analysis website. I have done some pretty extensive analysis on GTX 280 SLI and QX 9650. I have investigated the affects of CPU overclocking, GPU overclocking, and SLI scaling, and CPU efficiency. See what you think and I would love some comments and feedback :)

BENCHMARKEXTREME
 
I haven't heard much about it lately, but I know that some older cards seemed to have "matched" timings. Not that they were the same, but they were coordinated to work with each other. Changing the core or memory timing (even setting it faster) seemed to throw off that match, so it would cause a slowdown overall, due to one part having to wait for the other.
 
InvisiBill said:
I haven't heard much about it lately, but I know that some older cards seemed to have "matched" timings. Not that they were the same, but they were coordinated to work with each other. Changing the core or memory timing (even setting it faster) seemed to throw off that match, so it would cause a slowdown overall, due to one part having to wait for the other.
Click to expand...

That's probably true for some cards, but I'm using EVGA's utility, which locks the shader clock. Also the avg FPS goes up while minimum is going down - so it seems like those CPU-limited moments get worse, while GPU-limited scenes get faster.
 
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