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 Which 970 and power supply - Forum Which Power Supply Do I Choose? - Forum Which power supply should I go with this build? - Forum which power supply? - Forum Which power supply should I get? - 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 SolvedCan someone suggest an alternative power supply for this build which is of similar price and quality? Forum SolvedWhich power supply should i use for 750 ti Forum SolvedPower supply has to go. No, I am not asking which one to buy. Forum SolvedWhich Power Supply? Forum SolvedWhich Power Supply? Forum SolvedIs My Core 2 Duo E7400 2.80 GHz ..... Compatible With radeon hd 7770 GPU ...? And if it is Which power supply should i have t Forum SolvedWhich power supply is better? Forum SolvedTwo choices on power supply, which is better. Corsair CX-750 V3 or Aerocool GT700S 700W. Forum Solvedwhich power supply to use? Forum SolvedWhich Power Supply is best for me Forum SolvedWhich Power Supply Should I Use Forum SolvedCant decide which motherboard, and what power supply will I need? Forum Solvedfx 8350 and msi r9 280x in a prodigy or prodigy m case, which motherboard, power supply, ram etc? Forum SolvedWhich Power supply should I get? Forum SolvedWhich power supply should I get for 650-700 watts Forum More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !