Which power supply? Tags: Power Supplies HD Components Last response: August 2, 2012 1:54 PM in Components Share professorG 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 abekl 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... DavidY July 28, 2012 6:33:39 AM XFX Core Edition 850 watt Pro Series (Seasonic) for about 80 pounds: http://www.amazon.co.uk/dp/B0045L4BNW/?tag=pcp0f-21 Reviews here: http://www.jonnyguru.com/modules.php?name=NDReviews&op=... http://www.hardwaresecrets.com/article/XFX-PRO-850-W-Po... http://www.kitguru.net/components/power-supplies/zardon... Related resources Budget gaming - which power supply should I get? - Forum Which power supply for an AMD Athlon64 x2 3600+ - Forum Budget gaming build - which power supply should I get? - Forum Which power supply should i use? - Forum Which power supply should I choose??? please help - Forum Can't find your answer ? Ask ! Get the answer professorG 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 DavidY July 28, 2012 3:21:06 PM This user is suggesting that a 750 watt PS would be satisfactory for a tri crossfire: http://forums.anandtech.com/showpost.php?p=29921095&pos... XFX 750 watt Core Edition Pro Series for about 74 pounds: http://www.amazon.co.uk/dp/B0045L4BJ6/?tag=pcp0f-21 Silvune 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. professorG August 2, 2012 1:54:41 PM Thanks, thats the one i'll get then Can't find your answer ? Ask ! Publish Related resources Which Power Supply for this build? Forum Which is good power supply for Sapphire AMD/ATI HD 7850 HDMI OC Editio Forum Which Power Supply is better ? Forum Which Power Supply Is Better Overall? Forum Is this power supply sufficient for these GPUs? Also, which GPU? Forum Which power supply to go with? Forum Which Power Supply Forum Which Power Supply ? Forum Which power supply is better Forum Which power supply is better? Forum Which power supply to use with K8N Neo4 Platinum/SLI Mothe.. Forum Which Power Supply to get for this spec? Forum Which power supply should I buy Forum Which power supply should i get? Forum Which power supply to get? and opinions on new build. Forum More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !