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Can i crosfire 2x 5770 with 600 psu?

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April 27, 2010 7:16:39 PM

my system
Core i5 750
2x2 corsair 1600 8-8-8-24
5770 xfx
2x WD500 Black raid 0
AsRock extreme P55

PSU: OCZ ModXStream Pro OCZ600MXSP
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

This PSU is solid no problems at all, but can it handle 2x 5770 ??

thanks in advance.

More about : crosfire 5770 600 psu

a b à CPUs
April 27, 2010 7:29:13 PM

It may be able to do it but I will most likely strain the powersupply. In other words I would not suggest it.
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April 27, 2010 7:51:06 PM

Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5 $134.99 to $179.99


Core Clock: 850mhz
Stream Processors: 800
Effective Memory Clock: 4800mhz
Power Consumption at Idle: 18 watts
Power Consumption at Full Load: 108 watts
http://images17.newegg.com/is/image/newegg/14-150-464-T...$S180W$

* Recommended is a 450 watt PSU with one 75 watt 6 pin PCI Express connector, but could be run on a quality 400 watt PSU. 600 watt with two 6 pin connectors will be needed for crossfire.
* Recommended 37 Amps on 12 volt rail for single card and 50 Amps for crossfire. This card can run on lesser this is just recommended and will be able to run with at least 30 Amps on 12 volt rail.



will its only 108 at full load and im not overclocking, so is that fine?
a b à CPUs
April 27, 2010 7:56:58 PM

600w will be more than good enough for crossfired 5770's.
April 27, 2010 8:22:11 PM

Jennyh you sound like your really sure about it, but can you tell me why ? i really dont know how PSU and System watts goes into play.
a b à CPUs
April 27, 2010 8:33:18 PM

intelx said:
Jennyh you sound like your really sure about it, but can you tell me why ? i really dont know how PSU and System watts goes into play.


I don’t want to be mean, but OCZ is not one of the top brands for psu and going that close to its limit will force it to run on high constantly if it works.
a b à CPUs
April 27, 2010 8:42:28 PM

600w is a lot of power for a system. If you had said two fermi's and a gulftown then clearly that wouldn't be enough, but for an i7 750 and two 5770's, 600w will be good enough. Llama is correct in what he says, it will be a strain but imo it's enough.

You are cutting it pretty close yeah, but it's good enough so long as you aren't running all of your components highly overclocked. :) 
April 27, 2010 9:31:44 PM

will only my cpu overclocked it to 3.6 at 1.24v, not sure how much effect that has on PSU, but i also read on other forums same thing, it should be more than enough.

thanks for the help!
a b à CPUs
April 27, 2010 9:37:41 PM

Honestly, I cannot imagine you having any issues with a 600w psu. These 5770's barely draw any power, I've seen reports that they draw a maximum of 70w in real terms.
April 27, 2010 10:14:54 PM

jennyh said:
Honestly, I cannot imagine you having any issues with a 600w psu. These 5770's barely draw any power, I've seen reports that they draw a maximum of 70w in real terms.


Agreed, not to mention the i5 750 has the lowest power consumption of pretty much any high performance cpu.
a b à CPUs
April 27, 2010 10:25:13 PM

Cool avatar amk09 :D 
April 27, 2010 11:26:15 PM

o thats good, so im good to go i'll get another one a do a crossfire.

thanks alot for the help guys, really appreciated.
a b à CPUs
May 3, 2010 3:07:52 PM

If you do encounter any instability issues you can reduce your over clock and it should strain the psu a little less.
May 3, 2010 3:24:58 PM

i would say no as i am worrying about my amd 955@ 3,8ghz doing that with a Coolermaster Silent Pro 700W Modular PSU
a b à CPUs
May 3, 2010 4:25:53 PM

To the OP: If your PSU is a decent 600watt with 2 PCIe connectors, then it should fine.

Pro Llama said:
I don’t want to be mean, but OCZ is not one of the top brands for psu and going that close to its limit will force it to run on high constantly if it works.

OCZ is a good brand for PSUs, not top, but still good. They were decent before they bought PCPower&Cooling, and they've improved after they bought PCP&C.
a b à CPUs
May 3, 2010 5:20:37 PM

Your system - Approx 280 -> 300 Watts. with 2nd 5770 at MAX load add 115 Watts
So with xfire 400 Watts give or take 25 Watts.

http://www.techspot.com/review/209-ati-radeon-hd-5770/p...
http://www.techpowerup.com/reviews/HIS/HD_5770/28.html

Have i5-750 (@3.2), 5770, 4gigs ram, 1 SSD, 2 HDDs, one Blu-ray recorder, one DVD recorder. My system w/prime95, or furmark running just under 300 Watts.

Normal gaming is normally less load than furmark andor Prime95. So you should be sligthly less than 400 W. 400/600 = 66.7% of rated load for 600 W PSU which is OK.
a b à CPUs
May 3, 2010 6:47:17 PM

Bluescreendeath said:
To the OP: If your PSU is a decent 600watt with 2 PCIe connectors, then it should fine.


OCZ is a good brand for PSUs, not top, but still good. They were decent before they bought PCPower&Cooling, and they've improved after they bought PCP&C.

I never said it was a bad brand, just said not one of the top brands. I’m just pointing out that you can push the top brands a little harder than some other.
May 3, 2010 10:16:20 PM

RetiredChief said:
Your system - Approx 280 -> 300 Watts. with 2nd 5770 at MAX load add 115 Watts
So with xfire 400 Watts give or take 25 Watts.

http://www.techspot.com/review/209-ati-radeon-hd-5770/p...
http://www.techpowerup.com/reviews/HIS/HD_5770/28.html

Have i5-750 (@3.2), 5770, 4gigs ram, 1 SSD, 2 HDDs, one Blu-ray recorder, one DVD recorder. My system w/prime95, or furmark running just under 300 Watts.

Normal gaming is normally less load than furmark andor Prime95. So you should be sligthly less than 400 W. 400/600 = 66.7% of rated load for 600 W PSU which is OK.


if that is so then i should be good, im gonna get it next week and do a crosfire, and yea i dont think my system goes at full power even when im gaming, thanks for your support, this forum is the best others i have went to dont even bother to help.
!