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Crossfire Question

neo-omega

neo-omega

neo-omega

Associate
Joined
5 Apr 2006
Posts
675
Location
Glasgow, Scotland
Hey all, once more I find it's been a very long time since I last was on the OcUK forum.

Introductions aside I was wondering what the ramifications would be of crossfiring 2 HD 4870's of different memory sizes (for e.g. a 512 with a 1gb model).

I currently have an HD 4870 512 and was wondering whether the next step would be to crossfire it with another 512, with a 1gb model or to just ditch it and get the next generation. My system is currently water-cooled and so I would wish the crossfire to be water-cooled as well (a slightly more expensive option but on the plus side my graphics card usually sits at a very balmy 44 c during heavy gaming).
 
they'd only run with 512 per card; you have to match memory sizes to get the benefits.

my setup is almost the same as yours (apart from i'm running dual 4870's, soon to be a 5970 once i can get the shroud off.... long story) but having both gpu's under water is brilliant - you get some mentally high frame rates!
 
cheers, so I may as well save myself a few pennies and get the 512 version. I am looking to get a dell ultrasharp 24" for use with my PC as well as my PS3. Would it be best to get crossfire for that resolution? Is there much difference between crossfire and non-crossfire with the most recent drivers?
 
at that res i'd say yes; i run 2 20"@ 1680x1050, and my xfire does brilliantly, run supcom in dual display and it drops from 60-80fps during an intense battle to about 30fps (8xAA, maxed etc), so depends on what you play, but 2x4870 512mb's are still really good, just lacking dx11...
 
Stupid question here, do the brands matter when it comes to crossfire compatability? I'd assume not but it's always good to check I find.
 
Well, I already own a powercolour 4870 but can't seem to be able to locate another one so I would likely get an XFX or maybe Sapphire card with 512 Mb from a popular auction site.
 
Ah, so the next logical move would in fact be a mobo upgrade then? Sorry for the continuous posting but it'd be nice to get some idea as to where to go from here. Any recommendations? The alternative is of course wait about another 6 months or so for a full system upgrade of course.
 
Yeah, you'd need an X38 or X48 board but the problem with that is that they're EOL now so you have a poor choice, or would need to buy second hand.

A second hand Gigabyte X38-DS4 or something similar shouldn't set you back too much though.
 
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