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How to know?

post #1 of 8
Thread Starter 
Heya, i was just wondering how i am to know when to increase voltages when overclocking my Radeon 5750. The default GPU clock is 740MHz and the default memory is 1200MHz. I overclocked the core to 815 (10%) and the memory to 1230MHz (3%). (I know i didnt overclock my memory that much, but i heard it shouldt be overclocked as much as the GPU clock).
So my computer runs fine now, and the GPU temp didnt increase at all. How do i know weather to turn up the voltage? Is it the temp.?
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500GB SATAII WD HARDDISK, 7200RPM Windows 7 HP 64bit ASUS VK222H 500W Power Supply 
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post #2 of 8
You turn up the voltage when it becomes unstable. I would work on the core first before dealing with the memory as you will receive a greater increase in performance from core overclocks than with memory. Once you find your max oc on the core then work on memory. Make sure you test your overclocks for stability in multiple games before deciding the overclock is stable
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post #3 of 8
Thread Starter 
Would it hurt to just turn up the voltage slightly from the start? Since i dont have any games on my computer atm. Wating for Shogun 2
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CPUMotherboardGraphicsRAM
AMD Phenom II x4 955 MSI 770-C45 ATI Radeon HD 5750 - 4GB DDR3 1600MHZ, KINGSTON HYPER-X 
Hard DriveOSMonitorPower
500GB SATAII WD HARDDISK, 7200RPM Windows 7 HP 64bit ASUS VK222H 500W Power Supply 
Case
Black ATX 
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My System
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CPUMotherboardGraphicsRAM
AMD Phenom II x4 955 MSI 770-C45 ATI Radeon HD 5750 - 4GB DDR3 1600MHZ, KINGSTON HYPER-X 
Hard DriveOSMonitorPower
500GB SATAII WD HARDDISK, 7200RPM Windows 7 HP 64bit ASUS VK222H 500W Power Supply 
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Black ATX 
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post #4 of 8
Thread Starter 
And how many years can a graphics card hold, say if i do a stable overclocking from 740 to 815 clock rate?
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AMD Phenom II x4 955 MSI 770-C45 ATI Radeon HD 5750 - 4GB DDR3 1600MHZ, KINGSTON HYPER-X 
Hard DriveOSMonitorPower
500GB SATAII WD HARDDISK, 7200RPM Windows 7 HP 64bit ASUS VK222H 500W Power Supply 
Case
Black ATX 
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My System
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CPUMotherboardGraphicsRAM
AMD Phenom II x4 955 MSI 770-C45 ATI Radeon HD 5750 - 4GB DDR3 1600MHZ, KINGSTON HYPER-X 
Hard DriveOSMonitorPower
500GB SATAII WD HARDDISK, 7200RPM Windows 7 HP 64bit ASUS VK222H 500W Power Supply 
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Black ATX 
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post #5 of 8
Quote:
Originally Posted by willi0201 View Post
And how many years can a graphics card hold, say if i do a stable overclocking from 740 to 815 clock rate?
Should be a few months less than if you ran in stock.
     
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Hard DriveHard DriveOptical DriveCooling
Intel 750 800gb Samsung 950 Pro 256gb with AngelWing PX1 PCIE h... Lol Corsair H80i v2 
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post #6 of 8
Quote:
Originally Posted by willi0201 View Post
Would it hurt to just turn up the voltage slightly from the start? Since i dont have any games on my computer atm. Wating for Shogun 2
I am unsure what voltage that card runs or if that card even has voltage control. With the 5800 series 1.25v is doable on air cooling. Turning up the voltage from the start is fine, monitor your temps though as they will go up especially when the card is put under load. You can use furmark to see what your max temps will be, but keep in mind that temps you experience in furmark are a worst case scenario. What I mean by that is that you likely never seen such temps playing a normal game.

Another thing is that you should take the fan off auto and set it to 80-100% to make sure you are getting the full benefit of the cooler on that card. As for the lifespan of a card overclocked, they can last a long time overclocked provided cooling is sufficient. I would keep temps under 90c when under load.
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CoolingCoolingCoolingCooling
RAD: HW Labs GTX 360 Stealth GPU's: 2 x EK FC-6950 CPU: EK Supreme HF Scythe Ultra Kaze 3K RPM x10 
CoolingOSMonitorKeyboard
Zalman MFC1 Plus Fan Controller x2 Win 7 Pro x64 3 x Asus VW246 Logitech G15 rev1 
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2x 1 TB WD Black Raid 0  Lite-On 24x DVDr-RW DL Pump: Swiftech MCP35x2 RAD: 2x MCR320  
CoolingCoolingCoolingCooling
RAD: HW Labs GTX 360 Stealth GPU's: 2 x EK FC-6950 CPU: EK Supreme HF Scythe Ultra Kaze 3K RPM x10 
CoolingOSMonitorKeyboard
Zalman MFC1 Plus Fan Controller x2 Win 7 Pro x64 3 x Asus VW246 Logitech G15 rev1 
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post #7 of 8
Have i been under a rock so long that i didn't know that the 5750's has started having voltage control?

The only way i know that you can use to increase voltage with the 5750 is by pencil modding.

And you start increasing the voltage when the OC becomes unstable.
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post #8 of 8
Quote:
Originally Posted by Spykerv View Post
Should be a few months less than if you ran in stock.
If proper cooling is present, overclocking won't have an effect on the product's lifespan.
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