joe2d

Is it possible to crossfire HD4850 with HD4770? Both cards are quite different, here are the specs for comparison:

HD4850 Core: 625 Ram: 1980GDDR3 Bandwidth: 256-bit
HD4770 Core: 750 Ram: 3200GDDR5 Bandwidth: 128-bit

I'm interested in getting a HD4770 to crossfire with my HD4850, but are they compatible? Will there be issues crossfiring these 2 cards? Thanks in advance.

flag182

No, you cannot do that. Have to be same exact card.

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joe2d

But its been done before, read an article about crossfiring a HD4850 & HD4870.http://www.hardwarecanucks.com/forum...ce-review.html

bavarianblessed

No they do not have to be the same exact card.

Make sure they are the same series. 4870 will crossfire with 4850 and 4830, but not 4770 or 4670.

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Nightz2k

Don't have to be the same exact, just the same family, like 4870 + 4850. You'll need a 47xx with that one I believe.

This chart is outdated now, but it still gives you the general idea.

Crossfire Combo Chart

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Mootsfox

You can get a HD4850 for less than a HD4770 anyways. And the HD4850 is faster.

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joe2d

Around my place HD4770 sells for $36 less than a HD4850, which is why im interested in crossfiring them. I've heard mixed answers & its confusing some people telling me its possible, but 1 of the card will downclock to match the slower card. While you guys here tell me its impossible. So

Nelson2011

you can only xfire a 4850 with a 4850,4870,4870x2,4890 only the same first two numbers like a 4650 with a 4670

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Mootsfox

If you are in the US, Newegg has great open box deals on graphics cards. The OCN marketplace forums also have good deals on cards. I sold my old HD4850 + HR-03GT for $100 shipped last week.

According to this chart (which is outdated) you won't be able to crossfire two cards that are of different families (i.e. HD4650 and HD4850).

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Important reads for all members
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Acoma_Andy

Actually the HD4770 is faster once both are overclocked. The HD4770 can hit 1Ghz on the core.

Yeah the HD4770 is much cheaper here too €90 for the 4770 and €120 for the 4850. But it's not possible to Crossfire them because they are from a different serie.

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