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Site:tomshardware com amd radeon hd 7970 with 620w

Last response: in Graphics & Displays
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March 10, 2012 1:46:07 PM

Hello, will 620w will be good with AMD Radeon HD
7970.No overclocking and CrossFire.
a b K Overclocking
a b À AMD
March 10, 2012 1:59:30 PM

Yes is good. You can overclok the video card with 620W PSU.
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a b K Overclocking
a b À AMD
March 10, 2012 2:38:22 PM

*Note it's NOT just the Total Wattage. The PSU must also have sufficient Amps on the +12V rail (or combined rails).

HD7970 requires at least 40Amps. It is very overclockable and a 25% overclock could consume 55Amps of current!!

I recommend a PSU with at least 650Watts and 60Amps to be safe. About $100 if you shop around.

Read my comment and keep that in mind:
http://www.tomshardware.com/forum/328808-28-power-suppl...
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a b K Overclocking
a b À AMD
March 10, 2012 10:31:41 PM

lolsniperftw said:
here is the rest hardware:

CPU : i5 2500 3.3 GHZ
HDD: Western Digital Caviar Black 1TB
RAM:6gb

Edit :

I found that PSU :

http://www.corsair.com/enthusiast-series-modular-tx650m...

Is this good enough?


YES. The HD7970 (non-overclocked) needs 40Amps. This PSU has 54Amps.

IMO, the best card available is the HD7950 OC from Saphire Tech:
http://www.legitreviews.com/article/1862/

It has a GREAT cooling solution, can be overclocked, has a dual BIOS and costs about $490 at NCIX (USA). It was UNOFICIALLY overclocked by 45% though I would not do that myself. I would overclock to 20% above stock. Keep in mind you need MORE AMPS to overclock and it's not proportional. A 25% overclock needs close to 40% more Amps so keep that in mind.

You can use the above PSU and HD7950 OC and still have a modest overclock on the graphics card. Run FURMARK to test the graphics card for stability.
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