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Which power supply?

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  • Power Supplies
  • HD
  • Components
Last response: in Components
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July 27, 2012 6:39:18 PM

Hi guys,

My winpower psu i ordered was DOA (not suprising apparently). I'm now looking for a replacement.

My main issue is i need to power a HD 4870 and a HD 4870x2 in tri crossfire.

http://www.guru3d.com/article/radeon-hd-4870-x2-review-... - this reckons that 2 hd4870x2's
use about 740w max so i figured 750w would be fine.

These are my choices (max price £65 if you would like to suggest other options)

http://www.ebay.co.uk/itm/LIAN-LI-SILENT-POWER-SUPPLY-7...

http://www.pcworld.co.uk/gbuk/ocz-zs750w-uk-zx-series-a...

http://www.ebuyer.com/219542-xenta-800w-psu-13-5cm-fan-...

I'd like to know about which ones are good/bad quality and if they will last a long time

Thanks!

More about : power supply

a b ) Power supply
July 27, 2012 7:03:35 PM

If you are going to be doing tri crossfire, then you need more than 750 watts. 850 watts would be more appropriate.

The Lian LI PSU is a good one but underpowered.
The Xenta PSU is junk
The OCZ PSU is ok, but underpowered.

Keep looking for an 850 watt PSU, and stick to the major brands. I think you'll have to set your price ceiling a bit higher, but it's worth it not to have troubles down the road.

Here's one PSU:
Corsair 800W GS Series PSU
http://www.ebuyer.com/263997-corsair-800w-gs-series-psu...
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July 28, 2012 12:31:45 PM

Are you guys sure i'm going to need 800+ watts? On the guru3d review on hd 4870 xfire, the quad crossfire uses 740w on full load and has very similar specs to mine, so i thought that 750 would be enough for tri crossfire??

I really don't want to spend over £70 on a psu
a c 87 ) Power supply
July 28, 2012 9:52:35 PM

You can get the Corsair GS800 for cheaper:
£71 @ Scan
http://skinflint.co.uk/570151

I wouldn't bother with Pixmania unless you already have a power cord you can use as I'm fairly sure they'll send you one with an EU power cord.

Out of the three you listed I would suggest using the OCZ ZS series 750W.
August 2, 2012 1:54:41 PM

Thanks, thats the one i'll get then :) 
!