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Radeon 4850 + 4870 CF?

Last response: in Graphics & Displays
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July 30, 2010 4:58:36 PM

I currently have a radeon 4850, and my motherboard supports CF. I was going to get a 5770 and sell my 4850, but then I thought that I could buy a 4870 and CF with my 4850. What kind of performance would I get here? Possibly around a 5850? Thanks in advance.

PS. What power supply should I get if I need three 6pin power connecters (2 for 4870, 1 for 4850)? My budget is around 50-70$. Thanks.

More about : radeon 4850 4870

a c 141 U Graphics card
a b V Motherboard
July 30, 2010 5:02:17 PM

when you CF those two it is more likely to have 4850 in CF performance because your current 4850 will hold back the 4870
July 30, 2010 5:04:40 PM

What if I set the 4870 as the main GPU?
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a b U Graphics card
July 30, 2010 5:07:12 PM

devinkoz said:
What if I set the 4870 as the main GPU?


wont make a difference. from what i've heard when mixing cards in crossfire, the more powerful card downclocks to match the weaker card
a c 141 U Graphics card
a b V Motherboard
July 30, 2010 5:07:52 PM

the outcome will be the same in term of performance
July 30, 2010 5:09:40 PM

Aiight, thanks for the info. I might just side with the 5770 and sell my 4850. BTW, how does the 5770 overclock? I've heard it can clock like a champ, but i'm not sure. Could I get it close to 950ghz?

EDIT: 950MHZ not ghz Lmfao
a b U Graphics card
a b V Motherboard
July 30, 2010 5:10:28 PM

I actually did this about a year or so ago and the 4870 scales down to the 4850 level, even down to the video card memory.

The 4870 = 1GB
The 4850 = 512Meg

the 4870 scaled to the level of a 4850 with 512 meg

If it helps, there was a decent gain in performance for me when i did this in most games.

Really Wish Nvidia allowed for different-model scaling like Crossfire does.
a c 141 U Graphics card
a b V Motherboard
July 30, 2010 5:20:14 PM

devinkoz said:
Aiight, thanks for the info. I might just side with the 5770 and sell my 4850. BTW, how does the 5770 overclock? I've heard it can clock like a champ, but i'm not sure. Could I get it close to 950ghz?


yes the card can OC well but you have to remember that every card have different OC capability even though the model is the same
a b U Graphics card
a b V Motherboard
July 30, 2010 5:22:51 PM

Why not get another 4850 it will be a mile better than a single 5770 and they cost next to nothing
July 30, 2010 5:26:39 PM

Another 4850? I doubt it. I look forward to CF 5770, and one 5770 will be much cooler and take up much less energy than 4850 CF... Correct me if I'm wrong.
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