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Old 01-02-2010, 02:07 PM   #1 (permalink)
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Default Suitable PSU?

Hi all. I've checked your very own PSU guide on these forums and just want to double check.

I'm looking to get a 4850 GPU & a new PSU for £150.

Is a Corsair 550W PSU suitable for the following rig:
Phenom x4 9650 @ 2.3GHz
1 640GB HDD
4GB DDR2
Windows 7
AMD 780V motherboard

Corsair's calculator says a 450W would be suitable, whats your opinion on this?
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Old 01-02-2010, 02:29 PM   #2 (permalink)
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Default Re: Suitable PSU?

Yes the PSU you chose is fine, a 450VX would also work.
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Old 01-02-2010, 04:23 PM   #3 (permalink)
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Default Re: Suitable PSU?

So a 450W Corsair would definately support this system with a 4850?

Sorry; just want to be sure.
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Old 01-02-2010, 04:33 PM   #4 (permalink)
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Default Re: Suitable PSU?

Yea it will, but Im not sure if the VX has two 6 pin PCIE, check that before buying.
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Old 01-02-2010, 04:40 PM   #5 (permalink)
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Default Re: Suitable PSU?

Both the 450 & 550W VX's have one, PCI-E 6 pin connector and the 550VX has one PCI-E 6+2 pin. Do I need the PSU to have 2 PCI-E connectors?
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Old 01-02-2010, 04:48 PM   #6 (permalink)
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Default Re: Suitable PSU?

Yea, the 5850 needs two 6 pins I believe,

the 550vx is sold out at newegg.

Try this one
http://www.newegg.com/Product/Produc...82E16817341016
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Old 01-02-2010, 05:01 PM   #7 (permalink)
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Default Re: Suitable PSU?

5850? Is that a typing mistake or was you thinking I typed 5850 in the first post?

I'm looking to get a 4850.
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Old 01-02-2010, 05:07 PM   #8 (permalink)
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Default Re: Suitable PSU?

Oh ok, but you should still buy one with two, for future upgrades.
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Old 01-02-2010, 05:10 PM   #9 (permalink)
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Default Re: Suitable PSU?

Quote:
ATI Radeon™ HD 4850 System Requirements

* PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard
* 450 Watt or greater power supply with 75 Watt 6-pin PCI Express® power connector recommended (550 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)
ATI Radeon™ HD 4800 Series - System Requirements

Ste is correct that the 450 will do you just fine especially when it is from a quality brand like corsiar. I always prefer a little headroom for future upgrades so I would go with the 550.
Newegg.com - CORSAIR CMPSU-550VX 550W ATX12V V2.2 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Power Supplies
I would like the extra pci-e connector as well along with the ability to run crossfire in the future.
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Old 01-02-2010, 05:12 PM   #10 (permalink)
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Default Re: Suitable PSU?

Quote:
Originally Posted by Ste View Post
Oh ok, but you should still buy one with two, for future upgrades.
Ok thanks. One question, if a PSU has one or many 6+2 pin connectors and a GPU you have only requires a 6 pin connector, do you just leave the extra 2 pins dangling?
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