would my PSU handle this?

[Fooz]

CPU: Intel i5-760 Quad Core Overclocked to 4.0Ghz

GPU: Sapphire ATi Radeon HD 6870 X2 (Crossfire) <- this is what i want to change as i currently only have 1

RAM: Corsair Dominator 8GB (2X 4GB Sticks)

Motherboard: Asus P7P55D Xtreme Design

Cooling System: Titan TTC-NK85TZ Fenrir

Hard Drive: Hitachi Deskstar 1TB

2nd Hard Drive: WD Elements 1TB External Hard Drive

PSU: 650W Corsair <- could this handle it?

OS: Windows 7 64 Bit

Case: Xigmatek Asgard ATX Mid


the reason i ask is because i recently posted a thread about my PC and i said i may get another GPU and crossfire them, then people were saying "i doubt your PSU could handle it safely" whereas other were saying "yeah it would work fine"

i know a bit about computers but not much when it comes to how much power each piece of hardware needs

so tell me, will it handle it, if not please state why(a website with the facts to back it up would be an extra internet point for you)

 

[MercurySteam]

To be perfectly honest, if you're going Crossfire and overclocking from 2.8 Ghz all the way to 4.0 Ghz then I would recommend a 750W PSU at least. It may work with a 650W but I can't guarantee 100% stability.

 

[oplinger]

You're probably right on the edge, a video card can use anywhere from 100 to 300 watts in power. High end models obviously use more.

I'd upgrade your PSU, just to be safe, since you're going to have 2 of them.

 

[MercurySteam]

Now that I think about it, to Crossfire a 6xxx series card (and a 6870 no less) would require at least 650W for best performance. Add a large amount of overclocking, multiple hard drives and potential for adding more RAM and hard drives in the future and you'll find that a 750W PSU is a good idea.

If you're after something for a good price, but still reliable I recommend either an Antec High Current Gamer 750W [http://www.newegg.com/Product/Product.aspx?Item=N82E16817371049&cm_re=antec_gamer-_-17-371-049-_-Product] or an Antec TruePower 750W [http://www.newegg.com/Product/Product.aspx?Item=N82E16817371025&cm_re=antec_truepower-_-17-371-025-_-Product].

 

[Zacharine]

Based on this:

http://www.bit-tech.net/hardware/graphics/2010/10/22/ati-radeon-hd-6870-review/2

The max power draw of Radeon 6870 is 151W.

Double that is 302W

The i5 Core, when not overclocked, according to
http://ark.intel.com/Product.aspx?id=48496

uses at (max?) load 95W.

Assume twice that for overclocking.
Assume 100W for everything else.

That's 600W. Leaving you 50W of reserve, assuming the PSU rails can handle the individual loads and have some left in reserve as well.

It's there and there. How old is the PSU? Corsair is a good brand, so there is no significant max wattage loss on the PSU within the first few years. But eventually even brand names products will loose 10+ percent of their total power throughtput ability.

I would recommend upgrading the PSU, because even if it does handle the new configuration, it will do so at or near max capacity. Six months to a year down the line it no longer might and the amount of waste energy from the PSU will be higher as well (efficiency curves usually reach their highest point at 75-80% of capacity, before lowering again.)

 

[SpAc3man]

AMD's website recommends at least a 600W and you need four 6-pin PCIe power connectors. You should be fine when it comes to real world applications.

EDIT: Here's a link: http://www.amd.com/us/products/desk...6870/Pages/amd-radeon-hd-6870-overview.aspx#3

 

[thenumberthirteen]

It's close. Under maximum load it may not handle it, but that's a rare occurrance.

 

[MrTub]

Based on this:

http://www.bit-tech.net/hardware/graphics/2010/10/22/ati-radeon-hd-6870-review/2

The max power draw of Radeon 6870 is 151W.

Double that is 302W

The i5 Core, when not overclocked, according to
http://ark.intel.com/Product.aspx?id=48496

uses at max load 95W.

Assume twice that for overclocking.
Assume 100W for everything else.

That's 600W. Leaving you 50W of reserve, assuming the PSU rails can handle the individual loads and have some left in reserve as well.

It's there and there. How old is the PSU? Corsair is a good brand, so there is no significant max wattage loss on the PSU within the first few years. But eventually even brand names products will loose 10+ percent of their total power throughtput ability.

Power Consumption (idle)
Windows 7 Desktop (Aero enabled) Idle Power Usage
Radeon 6870 1gb: 128w

Power Consumption (load)
3DMark06 Canyon Flight test, 1,280 x 1,024 0xAA 16xAF, Load Power Usage
Radeon 6870 1gb: 247w

Nvm just saw the gpu only watt test.



It should work... But I would buy higher watt psu considering your oc on the cpu and if you want to oc the cards

 

[Valagetti]

Being short n sweet... Don't see why not.