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Crossfire RX480 Overclock problem

Mnemosyune
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Hey guys,

I have been trying to overclock my two rx480s but ran into some problems.

Here is my setup:

i7 6800k at 4.2GHz

Asus Strix X99

4x8GB DDR4 at 3200MHz

M.2 OCZ256GB

Samsung 850 PRO 1TB

Samsung 840 EVO 250GB

Dual XFX RX480GTR

EVGA 650P2

Others: Kraken X52 and two other 120mm fans inside S340 Elite

 

The system fails when I try to increase the values of the cards just a bit (around 10%). Valley benchmark will run for 2~3 scenes before crashing depends how much I increase.

I think it lasts longer when I don't adjust the voltage and power limit.

The reason I listed the full rig is because I am wondering if this has something to do with the PSU. Could it because I am short of power? I do know I am using a smaller than usual PSU but I thought it is sufficient.

Many thanks!

P.S. The rig gets really hot and the fans on the GPU are LOUD when I game. Even playing Civ6 and Cities Skylines the fans are pretty loud in my opinion. Is there some tricks to deal with it? I played with the fan curves but the GPU gets to 70C degree and I am afraid to running low RPM

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Get a 750W PSU. Also, there is nothing wrong with 70c GPUs. 90c is when you should start worrying.

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I think it's your PSU. The wattage really starts to raise when you OC high and increase voltage.

 

If you upgrade your PSU, I recommend 800+ W to be safe...

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I am with the others it is probably your psu 

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Mhm. smells like the PSU.

My DingDongHo 650W isn't happy with my single RX480 when I disable max foreground FPS in Diablo 3. Lost 3 hardcore chars before I figured out why the PC kept freezing.

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7 minutes ago, Tam3n said:

I think it's your PSU. The wattage really starts to raise when you OC high and increase voltage.

 

If you upgrade your PSU, I recommend 800+ W to be safe...

Originally I was planning to get only one card, I guess I'll just use stock speed till I upgrade maybe to VEGA

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3 minutes ago, Mnemosyune said:

what kind of fan RPM should I set around when its around 70 degrees?

I have mine set to 60%

CPU i7 6700 Cooling Cryorig H7 Motherboard MSI H110i Pro AC RAM Kingston HyperX Fury 16GB DDR4 2133 GPU Pulse RX 5700 XT Case Fractal Design Define Mini C Storage Trascend SSD370S 256GB + WD Black 320GB + Sandisk Ultra II 480GB + WD Blue 1TB PSU EVGA GS 550 Display Nixeus Vue24B FreeSync 144 Hz Monitor (VESA mounted) Keyboard Aorus K3 Mechanical Keyboard Mouse Logitech G402 OS Windows 10 Home 64 bit

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36 minutes ago, Mnemosyune said:

Oh damn.... The fans on mine are pretty loud at 40% already. :(

loud at 40%?

CPU i7 6700 Cooling Cryorig H7 Motherboard MSI H110i Pro AC RAM Kingston HyperX Fury 16GB DDR4 2133 GPU Pulse RX 5700 XT Case Fractal Design Define Mini C Storage Trascend SSD370S 256GB + WD Black 320GB + Sandisk Ultra II 480GB + WD Blue 1TB PSU EVGA GS 550 Display Nixeus Vue24B FreeSync 144 Hz Monitor (VESA mounted) Keyboard Aorus K3 Mechanical Keyboard Mouse Logitech G402 OS Windows 10 Home 64 bit

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