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Can I cross-fire non-boost 7950 with boost 7950 ?

11 posts · originally from https://geek.digit.in/community/threads/can-i-cross-fire-non-boost-7950-with-boost-7950.167506/

mandarpalshikar
mandarpalshikar Original post #1
Dec 13, 2012 at 9:01 AM
Guys.. a dumb question but just wanted to confirm. I've a Asus DCII HD7950 non-boost edition already. Will I be able to crossfire it with say "Sapphire HD7950 with Boost" ? I guess yes but please confirm.
Also can I try running these 2 cards on my TX650V2 or is it too risky?

And BTW... I'm not purchasing new 7950 :( My friend owns a Sapphire 7950 with boost but he'll be out of India for nearly 6 months from now so was looking for way to utilize it :p
R
rock2702 #2
Dec 13, 2012 at 9:22 AM
You can crossfire both the cards.It's not possible on that psu,will be too risky.
skeletor
skeletor #3
Dec 13, 2012 at 10:04 AM
You can crossfire. You can even crossfire a HD 7950 with a HD 7970.
skeletor
skeletor #5
Dec 13, 2012 at 10:08 AM
mandarpalshikar said:
Whats ur thought abt TX650V2 ? Too risky running 7950 crossfire on it ?
Click to expand...
It will work fine. Asingh ran HD 4890 crossfire with an overclocked Core 2 Quad Q9550 on a TX650.

HD 7950 surely consumes less power than HD 4890. And then your i5-3570K isn't a power hog either.

You might need MOLEX converters though.
The Incinerator
The Incinerator #6
Dec 13, 2012 at 11:55 AM
The lower clockspeed or the VRAM of the DC or the non OC card will be default in that kinda CF.
Cilus
Cilus #7
Dec 13, 2012 at 12:58 PM
No, in Crossfire, you can run both the cards with different clock speed, they will not run at the speed of the lower one.
skeletor
skeletor #8
Dec 13, 2012 at 1:27 PM
Dunno but I guess Asus would have released a BIOS update for your card which enables boost? Most HD 7950 got it. You should check.
mandarpalshikar
mandarpalshikar #9
Dec 13, 2012 at 5:55 PM
There was an update to BIOS on 2012.10.18 . I;m not sure whether it changed anything or not. BTW how to check if Boost is enables or not ? I mean do we get any additional option in Catalyst Control center or how is it ?
skeletor
skeletor #10
Dec 13, 2012 at 5:59 PM
Download that BIOS and try opening it in Radeon BIOS Editor. (Don't flash, just open.)

Just open and see the clock levels.
mandarpalshikar
mandarpalshikar #11
Dec 13, 2012 at 7:30 PM
.ROM files which are in the .exe which Asus gives are not supported by RBE it seems. There are 2 ROM files in the .exe if I open it with 7zip along with some other files and ATIWinFlash
113-C3810100-104.ROM
113-C3810100-106.ROM