8350 + 7950 = 750w PSU?

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Bizwax

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Feb 12, 2014
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I have an FX-8350 CPU coupled with an XFX 7950 graphics card. I use the system for gaming. I was lead to believe that a 500w PSU would be enough to power my setup, but after doing some more reading various sources say that the 8350 consumes upwards of 200w at full load while the 7950 draws 300w. Thats +500w right there, before factoring in all the other components and peripherals.

What's the reality of the situation? 500w or 750w? I don't know who to trust.
 
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NiCoM

NiCoM

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Feb 8, 2014
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no you don't need 750w at all! You could run two gpus on one 750w.
you should pick 550-600w, im running an overclocked i5 with a 7970 Ghz edition (which is power hungry as hell) on my 550w 80+ Gold

just make sure it's 80+ Bronze/Silver/Gold from a decent company like Corsair, Seasosnic, XFX, Be Quiet! and 550-600w is enough for you.
 
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Bizwax

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Feb 12, 2014
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The calculator on the ASUS site says the same. Looks like 500w isn't enough after all.
 
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ko888

ko888

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Feb 18, 2009
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An FX-8350 at stock clock speed draws around 95 Watts at the 8-pin EPS CPU power connector at 100% processor load. When the CPU is overclocked to 5 GHz the power draw at the 8-pin EPS CPU power connector reaches 205 Watts at 100% processor load.

For a system using a single AMD reference design Radeon HD 7950 graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 30 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors. Some of the non-reference design cards will use one 6-pin and one 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

Which brand and model of 500 Watt PSU are you looking at?
 
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Bizwax

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http://hardocp.com/article/2012/10/22/amd_fx8350_piledriver_processor_ipc_overclocking/6#.UvvxSPl_vjY
http://www.legitreviews.com/amd-fx-8350-8-core-black-edition-processor-review_2055/13
http://www.hardcoreware.net/amd-piledriver-fx-review-vishera-8350/9/

For example.





Corsair CX500M. I already ordered it.
 
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ko888

ko888

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All of those reviews you linked to only measure total system power consumption at the AC wall outlet not CPU power consumption.

Corsair CX500M (SKU# 75-002017 / CP-9020059)
• OEM: CWT (Channel Well Technology)
• maximum combined +12 Volt continuous current rating of 38 Amps
• two (6+2)-pin PCI Express supplementary power connectors

That's more than enough to power your system with the CPU at stock clock speeds.
 
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xero99

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Aug 25, 2013
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yes those reviews aren't measuring just the CPU, as i said CPU on stock probably wont even go above 100W. Those are measuring the whole system, thats HDDs, motherboard, and even graphics card
 
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Bizwax

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Feb 12, 2014
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So no overclocking the CPU then? I can live with that. What if I wanted to push the GPU up to around 1100mhz though? Would I still be ok?
 
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ko888

ko888

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If you can get your GPU up to that speed reliably it should be able to handle it and as long as you don't run something stressful like FurMark Stability Testing.
 
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