HD 7950 Crossfire w/ R9 280

prettyflvcko · Dec 21, 2014

Hi guys I was just wondering If I could do a crossfire with a AMD HD 7950 and a R9 280

the one im using right now is this one :
http://www.newegg.ca/Product/Product.aspx?Item=N82E16814105030

And since I'm ''supposed'' to have 2048 stream proccesors idk if it'll rather fit with a r9 280 or r9 280x

R9 280 has 1792 Stream Processors wich a normal hd 7950 used to have, but mine seems to have the same as a hd 7970...

The r9 280x has 2048 Stream Processors...

I'm really confused right now I really need to know how to First : check how(Where) much streams proccesors I have

And I need to know If I can crossfire my 7950 w/ r9 280 or r9 280x

Thanks in advance

Edit : Btw my bios version is 015.022.000.001

damric · Dec 21, 2014

GPU-Z.

http://www.techpowerup.com/gpuz/

It's going to be the 7950 +280 for cfx.

prettyflvcko · Dec 21, 2014

damric :

Even if I have 2048 sp ?

damric · Dec 21, 2014

prettyflvcko :

Do you? If you do then you have a 7970.

prettyflvcko · Dec 21, 2014

damric :

This is the link where I bought it :

http://www.newegg.ca/Product/Product.aspx?Item=N82E16814105030

Look at the specifications. :/

damric · Dec 21, 2014

prettyflvcko :

damric :

This is the link where I bought it :

http://www.newegg.ca/Product/Product.aspx?Item=N82E16814105030

Look at the specifications. :/

That's a typo.

prettyflvcko · Dec 21, 2014

damric :

prettyflvcko :

That's a typo.

What do you mean ?..

damric · Dec 21, 2014

prettyflvcko :

damric :

What do you mean ?..

Newegg made a mistake. Check GPU-Z.

prettyflvcko · Dec 21, 2014

lemme check

johnnyb105 · Dec 21, 2014

Radeon HD 7950
3GB Memory, 384-bit GDDR5
Core Clock: 800MHz
Stream Processors: 1792 Stream Processing Units
Effective Memory Clock: 1250MHz (5.0Gbps)
More or less depending on the card maker if oc or not the 7970 has the 2048 SPU

johnnyb105 · Dec 21, 2014

lmao newegg makes tons of mistakes all the time..

prettyflvcko · Dec 21, 2014

So Yea I checked and I have 1792 unified sp, now I wanna know If I cf it with a r9 280 will I need to make the clock the exact same mhz ?

damric · Dec 21, 2014

prettyflvcko :

You don't have to, but you can.

prettyflvcko · Dec 21, 2014

damric :

Will it change some thing to the overall perfs ?

prettyflvcko · Dec 21, 2014

damric :

And will one crossfire briege be enough, or two would be better ?

damric · Dec 21, 2014

prettyflvcko :

The latest drivers use several different methods to combine the cards. If you let it automatically handle it then it will be fine. Where people get headaches is trying to squeeze every last drop of performance out of CFX, disabling ULPS, ect. If you find yourself wanting to do all that, just shoot me a message.

damric · Dec 21, 2014

prettyflvcko :

damric :

And will one crossfire briege be enough, or two would be better ?

1 for two cards.

prettyflvcko · Dec 21, 2014

damric :

prettyflvcko :

1 for two cards.

Alright thanks dude I had headaches trying to figure out all that !

nikoli707 · Dec 21, 2014

as long as both cards are 1792 core tahiti chips, they will crossfire. toms recently had an article on the new amd drivers are if i remember correctly, the new drivers have made some good strides in crossfire performance in popular games.

HD 7950 Crossfire w/ R9 280

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