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Ocz modxstream pro 700w enough for crossfire 5850's

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Power supply Master

No... IMO

The OCZ only has two PCI-e connectors and you need for. You could try two adpators but I'm a firm believer if the PSU doesn't have all the connectors you need for your GPU's, it isn't strong enough...

In your specs, you list a 750W PSU. What is the manufacturer and make of that PSU?
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Power supply Master

You just need a minimum of a 750 watt PSU from Antec, Corsair or SeaSonic and you'll be good to go. You don't need 1000 watt PSU. The max I would consider is a 850 watt PSU from either of the three I listed.

http://extreme.outervision.com/psucalculatorlite.jsp

check this out. I have just about the exact same setup as you, and there should be enough power...especially because you have a good quality psu. Anyways, i'm going to be doing 5850 crossfire on a corsair tx650.

According to that psu tester, you should be fine (from what i seen in over estimates)...and you don't need 1000w for 5850 crossfire, 650 or 750 should be good enough (so you don't want to do a side grade do you? O_o)

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Power supply Master

I do not recommend any of the OCZ 700 watt power supplies. Every OCZ 700 watt model has shortcomings and problems that were identified in technical reviews. OCZ offers a few psu's that are good, some that are adequate, and some that are of questionable quality and performance. Overall OCZ quality is inconsistant.

Here are the official power requirements for the ATI Radeon HD 5850 and HD 5870 video cards.


ATI Radeon™ HD5850 System Requirements:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard

500 Watt or greater power supply with two 75 watt, 6-pin, PCI Express® power connectors.

600 Watt or greater power supply with four 75 watt, 6-pin, PCI Express® power connectors for ATI CrossFireX™ technology in dual mode.


ATI Radeon™ HD5870 System Requirements:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard.

500 Watt or greater power supply with two, 75 watt, 6-pin, PCI Express® power connectors.

600 Watt or greater power supply with four, 75 watt, 6-pin, PCI Express® connectors for ATI CrossFireX™ technology in dual mode.

The power supply recommendations are for an entire pc system.

Corsair and Seasonic are two brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty.

so for crossfire mode i have plenty since its saying 600watt for crossfire??

I understand ocz doesnt make the greatest power supply but it cost me like $20 :-P with a bundle.
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