is psu gd enough for xfire

Da Gavster · 1 Oct 2011 at 22:40

thinking of getting another 1 of these for crossfire

http://www.overclockers.co.uk/showproduct.php?prodid=GX-036-HS

do u think my power supply is gd enough

coolermaster 700w silent pro

rest of spec is

2600k
p8p67 evo
8gb gskill sniper memory
2tb western digital hdd
1tb f3 hdd
60gb agility 3 ssd

thanks

RJC · 1 Oct 2011 at 22:45

You should be ok with that PSU.

PSU Conclusion:

http://www.bit-tech.net/hardware/psus/2008/08/12/cooler-master-silent-pro-700w/7

GTO656 · 1 Oct 2011 at 23:09

might be just enough but a bit higher would be recommended.

Sasahara · 2 Oct 2011 at 01:26

PSU wil be fine, you won't be going over 550 W on that rig crossfired, even running furmark.

Surveyor · 2 Oct 2011 at 01:52

The PSU is not the best for Crossfired HD 6950's but it'll probably do.

It only outputs 600W on the 12V rail which is where virtually everything is powered from.

It also only has 2 PCI-E power cables so you're going to have to use 4 molex connectors with adapters.

Da Gavster · 2 Oct 2011 at 11:41

cheers for the help guys, guess im gonna have to get another psu.

can anyone recommend a good 1, im also going to adding another 2x2tb hdd and another ssd

Surveyor · 2 Oct 2011 at 11:57

Da Gavster said:
cheers for the help guys, guess im gonna have to get another psu.

can anyone recommend a good 1, im also going to adding another 2x2tb hdd and another ssd

You don't really need a new PSU.

Like I said it'll likely do the job it's just more messy than a PSU with 4 PCI-E power connectors.

I suggest you try it before shelling out.

Use one "proper" PCI-E power connector and a connector from the molex adapters on each card.

Da Gavster · 2 Oct 2011 at 12:02

Surveyor said:
You don't really need a new PSU.

Like I said it'll likely do the job it's just more messy than a PSU with 4 PCI-E power connectors.

I suggest you try it before shelling out.

Use one "proper" PCI-E power connector and a connector from the molex adapters on each card.

to be honest m8 one pci-e cable alone powers my 6950 perfectly using both the 6 pins on the 1 cable

in 3d mark vantage i get 22k using either 1 cable or 2

Surveyor · 2 Oct 2011 at 12:09

Da Gavster said:
to be honest m8 one pci-e cable alone powers my 6950 perfectly using both the 6 pins on the 1 cable

in 3d mark vantage i get 22k using either 1 cable or 2

You're running two 6 pin connections from 1 PCI-E power cable?

Is that an 8 pin split into two 6 pins?

Da Gavster · 2 Oct 2011 at 12:13

the cable has an 6+2 and and 6 pin on the 1 cable, so i just used that to power my card and it works perfectly, have been playing the bf3 beta on ultra at 1080p with it setup like this and had no probs

d_brennen · 2 Oct 2011 at 12:18

Recepie for disaster!

My 5850cf/X6 1055t rig pulls <500w from the wall on full song. OCZ 700w PSU. One six pin pcie in each card and one 2x molex adaptor each on different modular cables to spread the load

Surveyor · 2 Oct 2011 at 12:19

Da Gavster said:
the cable has an 6+2 and and 6 pin on the 1 cable, so i just used that to power my card and it works perfectly, have been playing the bf3 beta on ultra at 1080p with it setup like this and had no probs

Your PSU uses one higher wattage cable that splits into 2 connectors at the end.

That's not the same as taking a 6 pin PCI-E cable and splitting it into 2 connectors.

The OP's PSU has 2x8 pin connectors so they could achieve the same effect as you if they can find 8 pin to 2x6pin splitter cables.

Da Gavster · 2 Oct 2011 at 12:42

so can i not use 1 cable for 1 card and the other cable for the other card? sorry i am not that clued up on power supplies

but i just think if i cant use them like that then why put 2 connectors on each cable if your only meant to use 1 of them

Surveyor · 2 Oct 2011 at 12:56

Da Gavster said:
so can i not use 1 cable for 1 card and the other cable for the other card? sorry i am not that clued up on power supplies

but i just think if i cant use them like that then why put 2 connectors on each cable if your only meant to use 1 of them

No, you need 2x6pin cables connected to each card otherwise they won't work.

A 6 pin PCI-E cable is rated for 75W.

An 8 Pin PCI-E cable is rated for 150W.

You have two 8 pin cables which split into 6+2 pins.

You can use the 6 pin part of each connector + another 6 pin connector from using a molex adapter on each card.

Or if you can find an 8 pin to 2x6 pin splitter you can use that as it will split the 150W supply into 2x75W supplies.

NZXT30 · 2 Oct 2011 at 12:57

you psu is fine dont waste money on a new one. I run my 6950s on 620w

Leeroy123 · 2 Oct 2011 at 13:05

It would be just about enough i think, but if you overclock your cpu too it would struggle.

Da Gavster · 2 Oct 2011 at 13:09

ok thought i would post a pic of the cable as im slightly confused

so is this cable no gd on its own to power 1 card

as you can see it has 2 6 pins and a 2 pin

currently i am using this 1 cable to power my card so in theory i could use the other cable to power the second card

Surveyor · 2 Oct 2011 at 13:13

Da Gavster said:
ok thought i would post a pic of the cable as im slightly confused

so is this cable no gd on its own to power 1 card

as you can see it has 2 6 pins and a 2 pin

Do you have 2 of those cables?

If so then they'll do the job.

They're different than the cables I saw in reviews of the PSU.

Da Gavster · 2 Oct 2011 at 13:15

yes there is a second cable that is exactly the same

Surveyor · 2 Oct 2011 at 13:21

Da Gavster said:
yes there is a second cable that is exactly the same

Sorted then.

Just connect the two 6 pin connectors from 1 cable to each card.

They must have changed the cables somewhere down the line.