Tom's Hardware > Forum > CPU & Components > Power Supplies, PC Cases & Case Mods > [Solved] Will this PSU be enough power for the HD5870?

[Solved] Will this PSU be enough power for the HD5870?

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - [Solved] Will this PSU be enough power for the HD5870?

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Best answer from JohnnyLucky.

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My PSU is the 750w thermaltake toughpower. It says 18a per 12v rail. It has 4, 12v rails. It says 60a combined loading max.

I have the 5870 on order. Recommended amps per rail is 20a.(40a total, since it uses two rails).

So what does this all mean? Is 18a per rail enough, or will it use more since I will be using only 2, 12v rails.

Here is the specs for this PSU: http://www.thermaltake.com/product [...] ov=n&ovid=

Can someone that actually has some true knowledge on PSU's please answer. Not people that are just assuming please.

Message edited by sincreator on 11-06-2009 at 05:53:51 PM

------------------------------ AMD Phenom II AM2+/AM3 X3 710 Triple Core@3.45ghz,Zalman CNPS9700 cooling fan,ATI Sapphire 5870,4Gb DDR-2 1066mhz Crucial Balistix,500gb WD Caviar Black 32mb cache,10000rpm 73 gig WD Sata II Raptor,WD 320gb sata II 16mb cache,M3A32-MVP Deluxe 790FX

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Here are the official power requirements for the brand new ATI Radeon HD 5850 and HD 5870 video cards.

ATI Radeon™ HD5850 System Requirements:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard

500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended

600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode

ATI Radeon™ HD5870 System Requirements:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard

500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended

600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode

The power supply recommendations are for an entire pc system. Figure about 40 amps on the 12 volt rail(s) for two cards operating in Crossfire mode

That's more than enough power for the HD 5870.

You have 60 amps on the 12v rails and the HD 5870 requires less than 1/3rd of that. Actually, you've got enough to go Crossfire if you wanted.

Message edited by TheViper on 11-07-2009 at 02:42:55 AM

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Best answer

Reply to JohnnyLucky

Its more than enough - I use my 425w enermax PSU with Phenom II 720 along with a GTX 275-which has higher idle/load power consumption than a ATI HD 5870!

Reply to redkachina

You are good to go w/that PSU my friend. Enjoy that new GPU!

Reply to sparky13

Got the 5870, and all is good. Thanks guys.

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[Solved] Will this PSU be enough power for the HD5870?

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - [Solved] Will this PSU be enough power for the HD5870?