HD 7950 Crossfire compatibility???

hoyble · Nov 27, 2013

I've just brought a pre-built chillblast vantage http://www.chillblast.com/Chillblast-Fusion-Vantage.html (its still not here yet). I was wondering about xfire with this machine as it comes with Chillblast Radeon 7950 3GB Graphics Card, which I cannot find anywhere to buy. Do you need the exactly same card for xfire, or could I not just use http://www.amazon.co.uk/gp/aw/d/B008LTJPKS/ref=mp_s_a_1_1?qid=1385561118&sr=8-1&pi=AC_SX110_SY165 ? Also does this boost the memory of the cards together, to like 6GB say?

Thank you in advance

corvetteguy1994 · Nov 27, 2013

no you only get 3gb of usable ram because each gpu mirrors the same data and you can use any 7950 with it the brands dont matter. IE i have a msi 7970 and a visiontek 7970 in CF

hoyble · Nov 27, 2013

corvetteguy1994 :

Sweet! Thanks man

spp85 · Nov 27, 2013

You can use ANY HD7950 GPU to Crossfire the 7950 you had!! About the 6GB VRAM, both SLI and Crossfire wont double the memory when you club them. Even though applications may shows 6GB memory its actually 3GB VRAM available to use, the other 3GB stores the exact same contents of the first GPU VRAM

corvetteguy1994 · Nov 27, 2013

hoyble :

dont forget to pick best answer

hoyble · Nov 27, 2013

spp85 :

Yeah cheers. I take it I'll need to upgrade my PSU? I have 600w one on the website. Also I'm worried about the cooling of the i5 3570k 4.6ghz oc. Do you think that standard fan will be enough? It will be in a fairly enclosed space as well?

corvetteguy1994 · Nov 27, 2013

hoyble :

spp85 :

Yeah cheers. I take it I'll need to upgrade my PSU? I have 600w one on the website. Also I'm worried about the cooling of the i5 3570k 4.6ghz oc. Do you think that standard fan will be enough? It will be in a fairly enclosed space as well?

what brand psu?

hoyble · Nov 27, 2013

corvetteguy1994 :

hoyble :

what brand psu?

FSP Premium Grade 80+ Certified 600W PSU so I don't know if that is a good brand or not?

corvetteguy1994 · Nov 27, 2013

hoyble :

For a system using two Radeon HD 7950 graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 700 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 46 Amps or greater and have at least four 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT a crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.

Even a Seasonic M12II-650 Bronze (SS-650AM), with its +12 Volt continuous current rating of 53 Amps and with its four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your intended system configuration. i would get a better PSU

hoyble · Nov 27, 2013

corvetteguy1994 :

hoyble :

For a system using two Radeon HD 7950 graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 700 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 46 Amps or greater and have at least four 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT a crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.

Even a Seasonic M12II-650 Bronze (SS-650AM), with its +12 Volt continuous current rating of 53 Amps and with its four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your intended system configuration. i would get a better PSU

Thanks a lot. I'm really new to all this and just learning what everything does and means but yeah I will definitely upgrade later on when I have got the money

corvetteguy1994 · Nov 27, 2013

hoyble :

corvetteguy1994 :

Thanks a lot. I'm really new to all this and just learning what everything does and means but yeah I will definitely upgrade later on when I have got the money

well here are some great brands to look at. Seasonic,Corsair,Antec, Rosewill, NZXT, XFX, Silverstone, Coolermaster, Thermaltake. i personaly use a nzxt hale 90 1000w in my system i've had it for nearly 2yrs with my current rig without a hicup. of dont forget to close the thread.

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HD 7950 Crossfire compatibility???

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