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OCZ ModXStream 700w PSU xfire?

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October 9, 2009 1:56:54 AM

Hello,
I recently purchased a ModXStream 700w from OCZ and I was just wondering if 700ws is enough to power 2 HD5850's or even 5870's.
My system is in my sig. I would have to get a new mobo for this.

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a c 248 ) Power supply
October 9, 2009 2:00:50 AM

700 watts is more than enough to power a system with two ATI Radeon HD 5850 or 5870 video cards in Crossfire mode. The official recommendation at the ATI web site is a 600 watt power supply with 40 amps on the 12 volt rail(s) for Crossfire.
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October 9, 2009 2:08:17 AM

Thanks Johnny, sounds good. It just sucks that they're so expensive.
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a c 248 ) Power supply
October 9, 2009 2:44:35 AM

I'm not a gamer so I settled for one XFX version of the ATI Radeon HD 4770 video card. Got it for $109.00 and shipping was free.
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a c 144 ) Power supply
October 9, 2009 2:11:34 PM

cgintz said:
It just sucks that they're so expensive.

That's not really expensive. That's about average for a good PSU in that capacity range. And even so, a 650 watt Corsair or Antec has more usable power (50 - 52 amps @ 12 volts compared to the OCZ's 46 amps).
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October 9, 2009 6:00:29 PM

I was talking about the 5870. Plus I would have to get a new mid to high end mobo. Pretty expensive haha
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October 23, 2009 1:13:36 AM

Ive been looking at this power supply as well, and while the wattage is enough i am fairly certain it cannot support Crossfire for two 5850/5870s due to each video card needing two PCIE connectors, so 4 in total with two cards. and this power supply only has two PCIE connectors... not 100% certain, but am I right?
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October 23, 2009 2:05:24 AM

Yeah it doesn't have enough. but molex is fine i think.
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October 23, 2009 2:27:17 AM

cgintz said:
Yeah it doesn't have enough. but molex is fine i think.


im a bit of a noob, not completely clear what you are referring to... are you saying you can convert the 4 molex connectors on the PSU to PCIE?

If yes, does the video card or the PSU come with adapters?
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October 25, 2009 10:09:36 PM

an i7 plus xfire is pretty power consuming. You might have to bump up to an 800+w. Personally if I had the money with your setup I would go for the 850 corsair.
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