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Thermaltake Litepower 700w Crossfire 5770s?

Last response: in Components
January 9, 2011 10:27:40 AM


A friend of mine bought the following PSU for his system and is thinking of adding a second 5770 for crossfire - i'm however very concerned about whether it will be able to cope and run safely.

His specs are;

x6 1090T w/ Thermaltake Frio
8gb Elixir 1333 (2x4gb)
Powercolor 5770
Thermaltake v5 LAN w/ additional 120mm fans
Single HDD / DVDRW

From what I can see his PSU is actually max continuous output 600w and does not appear to be 80+ certified and has two 12v rails (30A and 22a). (which makes me nervous in many ways, <3 my HX-850)

It does however have the required PCI-E pins and claims to have Over-Current/Over-Voltage protection.

The plan is to take his 1090T to a decent overclock (obviously with as near to stock voltage as possible to keep power consumption down) and add a cheap secondhand 5770 for crossfire (these won't be overclocked).

Would love to hear whether anyone thinks this PSU would be OK for this??

(PS - i'm aware a 6850/GTX460 would be the safer alternative for slightly reduced performance, but that'd cost $120 (incl. sale of his current 5770) vs 80$ to add a second 5770) *Australian Prices*

Best solution

a c 671 ) Power supply
January 9, 2011 10:39:48 AM

600watts is plenty for 2 x HD5770 in CF. Total system power under load is 390 watts so plenty of overclock headroom as well.
a b ) Power supply
January 9, 2011 10:41:02 AM

On paper it should work, a 600w+ is recommended as long as it is a quality unit.

If you switched to GTX460's you would then need 4xpci-e cables, 2 for each card.

Unless the psu is poor quality it should work ok.
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January 9, 2011 10:46:14 AM

Thanks for the quick replies - I'd be very comfortable running his system with a good 600w (corsair/seasonic etc), however this specific budget unit?

Also - the Phenom II X6 chips chugg down a fair bit of power especially when overclocked.

You're still fairly confident?

(PS the switch would be just to a single GTX460/6850, which isn't that attractive as more expensive and less performance, just less power req.)
a c 671 ) Power supply
January 9, 2011 10:49:53 AM

It would never have been my choice of PSU but it is rated at 600watt constant load and the +12 volt rails are good so I am confident it will run it.
January 9, 2011 10:52:05 AM

Agree - if I was involved in picking the parts he would have a TX-650 or similar but it seems this may just scrape through for his needs.

Thank you both for your help.
January 9, 2011 10:52:40 AM

Best answer selected by Nerdbox87.
January 9, 2011 10:59:07 AM

As would I but bought/built without my input months ago :) 
a b ) Power supply
January 9, 2011 4:32:08 PM

This topic has been closed by Mousemonkey