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Reference XFX 5870 - Maximum Voltage on Water?

post #1 of 5
Thread Starter 
I still my XFX AMD Radeon 5870 graphics card from a year ago and have just purchased a full watercooling loop for my CPU and graphics card. I run my graphics card at 1000/1300 (GPU/memory) with 1.200V stable. This is on air, where I run the fan at a constant 60% (a bit noisy!).

Since I'm getting my custom watercooling loop, I'd like to know what maximum safe voltage I should expect to be able to get to, to get the most out of this graphics card. I bought an XSPC Full Cover 5870 Razor HD waterblock and this is powered by a Swiftech MCP655 pump, an XSPC RX360 radiator with six 120mm fans with high air flow and static pressure (plus four of the same fans on the side of my case, a 140mm on the rear and a 230mm on the front). Needless to say the cooling will be sufficient! smile.gif
    
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post #2 of 5
You can go 1.3v no problem on water.

Ninja edit: as long as your temps stay in check, which shouldn't be a problem thumb.gif
    
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post #3 of 5
I'd say 1.4v, just watch the vddc temps.
But you're gonna find that > 1ghz on the core is going to require tons more voltage.
For 1ghz @ 1.26, 1035 @ 1.32v, 1050 1.37V, 1060 @ 1.45v.
My cards won't do > 1060 on the core, no matter the voltage.
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post #4 of 5
Thread Starter 
Ok, perfect, thank you. I guess if you got 1000MHz with 1.260V and I get it with 1.200V, it might be a good sign of capability for my particular card. 1.400V, ok, I might restrict myself to 1.350V as a safety headroom and hit the overclocking hard! smile.gif
    
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post #5 of 5
max voltage on afterburner is 1.33, at stress load, my gpu is 44celcius

i was hoping to get at least 1050 core, and 1300 memory but anything above stock memory clock, it will hang
 
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