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Need help! GPU usage stutters on Sapphire 7950 Boost edition - Page 2

post #11 of 23
Thread Starter 
Thats what i'm planning to buy next. a coolermaster hyper 212 evo with a push and pull configuration smile.gif I'm kinda scared to overclock my card because based on where i bought the card, if overclocked, the warranty may be voided. so, lol
post #12 of 23
Quote:
Originally Posted by cyberelite View Post

Thats what i'm planning to buy next. a coolermaster hyper 212 evo with a push and pull configuration smile.gif I'm kinda scared to overclock my card because based on where i bought the card, if overclocked, the warranty may be voided. so, lol

don't be afraid. 1100 mhz is very safe. you don't need to increase voltage. mostly you can hit that at stock voltage. also nobody can deny warranty for overclocking. only if you go for extreme voltage overclocking without proper cooling is there a risk of damaging the chip.
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post #13 of 23
Thread Starter 
Ohhh, i see. Thats good to hear then smile.gif I'll try it out once this problem is settled. So, i'm just gonna have to leave my card at +20% power control settings now? smile.gif
post #14 of 23
Thread Starter 
Also, how about memory clock? am i gonna leave it as is?
post #15 of 23
Quote:
Originally Posted by cyberelite View Post

Ohhh, i see. Thats good to hear then smile.gif I'll try it out once this problem is settled. So, i'm just gonna have to leave my card at +20% power control settings now? smile.gif

yeah leave power control at +20%.
Quote:
Originally Posted by cyberelite View Post

Also, how about memory clock? am i gonna leave it as is?

focus on core overclocks because that gives you almost linear performance improvements. once you have reached your max stable or desired core overclocks then you can try and push memory in 50 mhz steps to 1400 mhz. but you really don't need to as the HD 7950 has massive bandwidth with a 384 bit memory bus.
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post #16 of 23
Thread Starter 
How do i know what core clock is stable? From what i've been reading is that when overclocking, the card should be benchmarked every 5-10 minutes or so to see if there are artifacts, and if there is none, proceed by upping the clocks further (but slowly). Alright alright, thanks man! Thanks for the help!
post #17 of 23
Like said, overclocking memory doesnt help as much as overclocking core, but I noticed that in Crysis-benchmark (8xAA, veryhigh) with GPU at 1100 core/1250 memory I got bout 64,9fps and at 1100 core/1400 memory I got 66,2fps, so there´s some extra performance to be had in overclocking the memory as well smile.gif
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post #18 of 23
Thread Starter 
alright alright, how do i start overclocking? i mean at what core clock should i start?
post #19 of 23
Quote:
Originally Posted by cyberelite View Post

alright alright, how do i start overclocking? i mean at what core clock should i start?

start at 1 ghz and then keep pushing higher in 50 mhz increments.normally 1.1 ghz is quite easy to achieve at stock voltage.
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post #20 of 23
Quote:
Originally Posted by raghu78 View Post

GPU usage won't stay at a fixed %. it will vary and fluctuate. to test your card max out power control to +20% to avoid clock throttling. bench heaven 3.0 with extreme 8x AA and compare scores with other HD 7950 users in the HD 7900 users thread. test 3D Mark 11 too. then you could try a game like BF3.
also try and get a stable overclock on your CPU to 3.8 - 4.0 ghz. at stock speeds your cpu will bottleneck the HD 7950 boost.

Actually its supposed to. Mine is pegged at 99-98% constant. If its not there is a bottleneck..
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