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First time overclocking manually - Asus GTX 480

post #1 of 7
Thread Starter 
Hey all, as the title says this is my first time overclocking anything manually, though I think I get the gist of it.

Finished putting my new PC together today, I'll post a spec list if anyone wants it.

Currently, I'm using MSI Afterburner and Kombuster. I've achieved 850 core, 1700 shader and 1900 memory. I've also bumped the voltage up to 1075 (I'm really not sure about what I should set voltage to, I've just heard it needs to be higher the more you OC your card). This has gotten me around 515-520 average fps with Kombuster running for about 15mins.

Temps are around about 86-89 with an average case temp of 30. With air cooling only btw.

I tried pushing the memory clock to 2000 with the same voltage and after about 10mins the card reached 90 degrees and I got a driver failure warning. Is this to do with the voltage being too low? Or did I just come dangerously close to burning out my card

Any help or input will be much appreciated.
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Intel Core i5-2500k (4.5ghz) Asus P8P67 PRO Asus GTX 480 (875/1750/2000) Corsair XMS3 4gb (1600mhz) 
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post #2 of 7
Quote:
Originally Posted by Ashdown View Post
Hey all, as the title says this is my first time overclocking anything manually, though I think I get the gist of it.

Finished putting my new PC together today, I'll post a spec list if anyone wants it.

Currently, I'm using MSI Afterburner and Kombuster. I've achieved 850 core, 1700 shader and 1900 memory. I've also bumped the voltage up to 1075 (I'm really not sure about what I should set voltage to, I've just heard it needs to be higher the more you OC your card). This has gotten me around 515-520 average fps with Kombuster running for about 15mins.

Temps are around about 86-89 with an average case temp of 30. With air cooling only btw.

I tried pushing the memory clock to 2000 with the same voltage and after about 10mins the card reached 90 degrees and I got a driver failure warning. Is this to do with the voltage being too low? Or did I just come dangerously close to burning out my card

Any help or input will be much appreciated.
Don't bump the voltage until you run into stability issues. I'd recommend dropping the voltage a bit. It will decrease temps, and make the card last a bit longer.
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post #3 of 7
I wouldn't worry about overclocking the memory much, it makes very little difference. Keep pushing the core as high as you can, voltage can go up to the maximum in AB.

I'd also recommend setting up a custom fan profile that increases 1% for each degree in temperature, e.g 80% for 80 degrees. Try and keep below 90 degrees.
Wingman Fuzzi
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Wingman Fuzzi
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post #4 of 7
Thread Starter 
Thanks for the comments. I've dropped the voltage back to 1050, memory back to 1850 and set up the custom fan settings. I'll update after running it for a bit.

EDIT: Ran Kombuster for 10 minutes and got 495 average fps, temperature seemed stable at 84 degrees. However I keep getting driver failures. I have the latest driver from Nvidia. Is a driver failure considered instability? Do I need to increase the voltage again?

Cheers.
Edited by Ashdown - 3/7/11 at 6:12pm
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Intel Core i5-2500k (4.5ghz) Asus P8P67 PRO Asus GTX 480 (875/1750/2000) Corsair XMS3 4gb (1600mhz) 
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Western Digital Caviar Blue 500gb Windows 7 LG W2261VP 21.5" Razer Arctosa 
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My System
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CPUMotherboardGraphicsRAM
Intel Core i5-2500k (4.5ghz) Asus P8P67 PRO Asus GTX 480 (875/1750/2000) Corsair XMS3 4gb (1600mhz) 
Hard DriveOSMonitorKeyboard
Western Digital Caviar Blue 500gb Windows 7 LG W2261VP 21.5" Razer Arctosa 
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post #5 of 7
GPU doesn't crash whole system when it crashes, so it occurs as driver failure, and just reboots basicly, or atleast I haven't got my pc to crash with overclocking gpu yet, and I've had more crashes due oc than I can count.

Voltage is probably the cause for the crash, increasing it usually makes it more stable, if it doesn't you might just hit the maximum for the card, or vrm temp or such, is too high.
You shouldn't need much over 1.1v for maximum clocks, though every card is different.
Mostly 870-890mhz is the maximum for 480, or atleast what I'm aware of, with stock cooling that is.
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post #6 of 7
If the drivers are crashing then your overclock is unstable. Put the voltage up higher until it stops doing it.
Wingman Fuzzi
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Samsung 840 120GB + 850 1TB + Intel 520 240GB Samsung F3 1TB Thermalright Venomous X w/ FM122 Windows 7 Pro x64 
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Wingman Fuzzi
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Hard DriveHard DriveCoolingOS
Samsung 840 120GB + 850 1TB + Intel 520 240GB Samsung F3 1TB Thermalright Venomous X w/ FM122 Windows 7 Pro x64 
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Dell U2312HM 1920x1080 @ 60Hz Ducky Shine II (Blues w/ White Backlight) Corsair HX 620W Fractal Design XL (Black Pearl) 
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post #7 of 7
Thread Starter 
Ok, I've changed OC settings to 1075v, 825mhz core, 1650 mhz shader and 1850mhz memory. Max temperature is wavering between 86/87 degrees. Average fps of 478.

Each time the driver has failed has been around the 10 minute mark, currently at 15 minutes so I guess it's stable. I'll leave it running a while longer to make sure though. Thanks for all the help guys.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5-2500k (4.5ghz) Asus P8P67 PRO Asus GTX 480 (875/1750/2000) Corsair XMS3 4gb (1600mhz) 
Hard DriveOSMonitorKeyboard
Western Digital Caviar Blue 500gb Windows 7 LG W2261VP 21.5" Razer Arctosa 
PowerCaseMouse
Corsair TX850w HAF 912 Plus Razer Imperator 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5-2500k (4.5ghz) Asus P8P67 PRO Asus GTX 480 (875/1750/2000) Corsair XMS3 4gb (1600mhz) 
Hard DriveOSMonitorKeyboard
Western Digital Caviar Blue 500gb Windows 7 LG W2261VP 21.5" Razer Arctosa 
PowerCaseMouse
Corsair TX850w HAF 912 Plus Razer Imperator 
  hide details  
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