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Crossfire GDDR3 4850 with GDDR4 4850

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Cuiiey

Member
Joined
Sep 1, 2008
Location
Melbourne Australia
hiya guys!

I am able to purchase a GDDR4 4850 512mb, just wondering can i crossfire it with my 4850 DDR3 variant and will the mem speed run at the GDDR3 spec speed? or is this not possible, it should be though shouldn't it? :attn:


Thanks
 

ChaosInMind

Member
Joined
Jul 12, 2009
Location
Chicago
hiya guys!

I am able to purchase a GDDR4 4850 512mb, just wondering can i crossfire it with my 4850 DDR3 variant and will the mem speed run at the GDDR3 spec speed? or is this not possible, it should be though shouldn't it? :attn:


Thanks

The specs and speed of each card will remain in tact, but the faster card will be limited by the slower card.
 

ChaosInMind

Member
Joined
Jul 12, 2009
Location
Chicago
In other words, don't do it.

Well, he should still see a benefit just like if he xfired two 4830's. Just pretend that 4850 your putting in your system is actually a 4830.

4850's are cheaper now anyway.

Here is a ATI 4830 with free shipping for $132.99
http://www.buy.com/prod/xfx-hd483xy...pci-e-2-0-directx-10/q/loc/101/210635411.html

But you can get a 4850 for 109 free shipping...
http://www.newegg.com/Product/Produ...5238&cm_re=radeon_4850-_-14-125-238-_-Product
 

baris_

Member
Joined
Jan 20, 2010
Well, in this case he's talking about buying a DDR4 secondary GPU. Which he should not do because that is a waste. Unless I'm mistaken and that's the only thing that's being sold or it is the same price as a DDR3 one. If you can buy a secondary DDR3 one and it is cheaper, then he should never buy a DDR4 one.
 

Bobnova

Senior Member
Joined
May 10, 2009
Just like two normal 4850s, rather then an average of a ddr3 4850 and a ddr4 4850.
Both out perform 4830s.

I don't think the differing ram types would be a problem, but i don't really know for a fact.
 

ChaosInMind

Member
Joined
Jul 12, 2009
Location
Chicago
Id say you may notice a 1-2fps difference in speed. So it doesn't matter. Just get the cheapest or easiest card available to you. GDD3 or GDD4, the performance will be kick %##.
 

Bobnova

Senior Member
Joined
May 10, 2009
Hey just FYI:
Only core speed has to match crossfired, memory speed does not.
Just crossfired my 900mhz 4830 with my friends 993mhz 4850.
Memory clocks stayed different, worked just fine.