PSU query

danb21t · 25 Nov 2009 at 14:33

Thinking about a future upgrade, either i5 or i7.

I have an Enermax Liberty 500w in my current rig and it has caused me no hassle at all - very impressed with it. However people opinions on whether this PSU would be up the challenge of an i5/i7 set up with 2x 5770's and possible 2-4 HDDs.

I'm looking at the Corsair 850W which is currently on 'This Week Only'. However if I can still use my original PSU it will save me a nice sum of money.

SfnX · 25 Nov 2009 at 15:21

a 750w at least for your spec, a 500w would bottleneck your system by a lot. get the corsair just encase or find another 750~

xGaffner · 25 Nov 2009 at 15:25

I'd say no, two 5770's take about 390W when at full load and an i5 takes 170W when at full load, thats not even overclocked. When overclocked it takes about 200+ and the i7 quite a bit more. I'd recommend getting a 650W from a good brand like Corsair with decent amperage on the 12V rails, that will run it perfect. 850W is overkill.

danb21t · 25 Nov 2009 at 15:33

Ok thanks for the replies, I will look at 750w supplies.

Cheers

EsaT · 25 Nov 2009 at 15:53

And here we have confirmation how many people don't know anything about what they're talking about.

http://www.xbitlabs.com/articles/video/display/radeon-hd5770-hd5750_5.html#sect0

danb21t · 25 Nov 2009 at 15:57

Interesting link ESaT, looks like the 2x 5770 will draw an approximate of 120watts

danb21t · 25 Nov 2009 at 16:54

Does anyone know how much power the Asus P6T would consume in a maximum situation?

Generally only a keyboard, mouse, possibly a usb pen drive and maybe Iphone attached via USB ports.

So far I've calculated
graphics cards - approx. 120w
CPU - approx 130w
up to 4 HDDs - 10w a piece - 50w to be on the safe side
fans/cooling - 50w

It might be possible to use my existing 500w supply unless the MB is juicy