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(GPU) Performance drop after testing... why?

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#1
Hey guys, ive been trying to find a stable and efficient GPU clock on my 9600GT, I was testing performance with a test from 3dmark03 and writing down the results like this:

(overclocking only GPU from nvidiacontrolpanel)

GPU clock | Result (avg FPS)

661mhz | 140,1
671mhz | 137,7
681mhz | 138,2
720mhz | 141,6; 139,7; 141,5 (three times in a row)
740mhz | 142,3; 142,8; 142,7
767mhz | 144,2; 144,3; 144,3
785mhz | 145,2; 145,1; 144,9
794mhz | 145,3; CRASH;
----------------------------------
790mhz | 127,0; 121,6; !? ?! :wtf:
765mhz | 121,1; 119,7 ?! ?!
:wtf:

Why does it drop like that? It happened before, just like that, i get a crash and then low results on lower frequencies. All I know is that It can't be overheating.

Has anyone got an idea what causes this?
 
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#2
Lack of voltage, Maybe the VRM's can't cope so the card gets starved of power and crashes.
 

zehpavora

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#4
When nVidia driver crashes, the card goes to 2D mode, the lowest clocks possible int its BIOS.
The only way to reset this is by restarting the computer.

Trust me, I have 2 GTX275, overclocking them was quite painful at start...

EDIT:
I forgot to add that, once you restart your computer, you can try overclocking it again.
However, if crashes again, you'll have to restart your computer.
 
Last edited:
Joined
May 4, 2009
Messages
69 (0.02/day)
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Location
Kardzhali
System Name The Pacificator :D
Processor Athlon64x2 @ 3,05 ghz
Motherboard Gigabyte
Cooling DIY
Memory Corsair Xms2 800mhz 2gb
Video Card(s) Gigabyte 9600GT Zalman
Storage 40gb ATA + 320gb SATA
Case DIY
Power Supply sucky 400W
#5
thank you, zehpavora, :) that explains everything,

My sys specs are: 400W PSU, Athlon x2 5000+ 3050mhz, 2gb Corsair XMS ddr2 800 @ 440mhz, Gigabyte 9600GT with a zalman cooler, Gigabyte motherboard with a 690V chipset (old, and the main bottleneck)

Thank you guys for everything :) If someone is interested in the progress, post here :)
 

zehpavora

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Processor i7 920 @ 3.20GHz
Motherboard P6T Deluxe V2 BIOS 0901
Cooling Cooler Master V8 @ 38C - (up to) 70C (Open Air)
Memory OCZ 3X1333LV2G @ 9-9-9-24 1600 MHz
Video Card(s) 2x GTX 275 @ 690/1539/1280
Storage 640GB Caviar Black - 1TB Caviar Green
Display(s) Flatron 1900E BF
Case HAF 922
Audio Device(s) On Board sound @ 5.1
Power Supply TX850W
Software Windows 7 Ultimate x64
#6
No problem.
Looking at the clock table you've set up in the first post, it seems that your card is a good clocker (I don't know if that's normal for 9600's). Keep those clocks up!

On a side note, you can input your system configuration into your profile,
so you won't have to paste them in your questions making it easier for you.
 
Joined
May 4, 2009
Messages
69 (0.02/day)
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Location
Kardzhali
System Name The Pacificator :D
Processor Athlon64x2 @ 3,05 ghz
Motherboard Gigabyte
Cooling DIY
Memory Corsair Xms2 800mhz 2gb
Video Card(s) Gigabyte 9600GT Zalman
Storage 40gb ATA + 320gb SATA
Case DIY
Power Supply sucky 400W
#7
No problem.
Looking at the clock table you've set up in the first post, it seems that your card is a good clocker (I don't know if that's normal for 9600's). Keep those clocks up!

On a side note, you can input your system configuration into your profile,
so you won't have to paste them in your questions making it easier for you.
Thanks :), And i think if i can find a bios thingy that can tweak voltage, i can take it to the limit very easily... i have not searched, i saw one but it was long time ago, i aint got much free time this month


and about the sys config, i was ashamed, its old as F*ck :shadedshu :D
 

zehpavora

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Joined
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Paraná, Brasil
System Name Zeh's Dragon
Processor i7 920 @ 3.20GHz
Motherboard P6T Deluxe V2 BIOS 0901
Cooling Cooler Master V8 @ 38C - (up to) 70C (Open Air)
Memory OCZ 3X1333LV2G @ 9-9-9-24 1600 MHz
Video Card(s) 2x GTX 275 @ 690/1539/1280
Storage 640GB Caviar Black - 1TB Caviar Green
Display(s) Flatron 1900E BF
Case HAF 922
Audio Device(s) On Board sound @ 5.1
Power Supply TX850W
Software Windows 7 Ultimate x64
#8
Don't sweat about it.

About the voltage:
Be extremely careful about that! You can end up frying your card!
Leave voltage tweaking only to professionals, you got to study a lot of overclocking to do that.

TPU has some programs for BIOS tweaking. i don't know the names from the top of my head, but it's there on the main page. However, I don't recommend it.

Since you're using an nVidia card, you could download EVGA Precision. It will let you set profiles and it will monitor your card status, which is very useful for any overclocker.
EVGA and MSI have tools for overclockers such as OC Scanner and Afterburner, respectively.

Hope that helps.