3 x 7970 Problem with 3rd card ...

[ZenekPOLSKA]

Hello, i'm new on this forum

last week i bought :

MSi z77 mpower
3 x Gigabyte Radeon HD 7970 ( GV-R797OC-3GD )
Corsair 1200W
Aerocool PGS XPREDATOR
Ram 4 GB 1600Mhz
HDD 80GB
Intel Celeron G550 2,60 GHz 2MB

and i have a problem with 3rd card.

i use Windows 7 64bit and the system can't found 3rd card.

two cards is working ok. about 1180 Mhash/s.

i was try on intel i3-2100 but still is the same problem with 3rd card.

Where is the problem ? i have new bios and drivers.


"Due to bandwidth allocation limitations, it is strongly recommended for users to install 3rd gen intel core processors to enable functionality in the third pci express slot" Words on MSI z77 mpower (

So i must to buy minimum intel core i5 ?

[gsmline]

Ja miałem problem z nowymi kartami. MSI afterb.. jak go załaduje to sie rypie wszystko na oryg. sterach działa na 3.

[whitetoo]

Did you find your answer Zenek?

[vm1990]

easiest way to sort it out is try plugging a 2nd monitor into the 3rd card it should then show up

[whitetoo]

Is there a minimum CPU requirement for trifire 7970s?
Would the CPU cause a bottleneck for the hash rate?

[vm1990]

in theory there isnt a limit as its all GPU intensive so even a single core running at 1.2GHz woukd be enough

[whitetoo]

thanks for the insight!

[alwind]

wrong processor. buy an ivy bridge