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Single radeon hd 5850 or dual radeon hd 5750?

Last response: in Graphics & Displays
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January 23, 2010 1:55:01 AM

On Newegg.com you can purchase a single radeon hd 5850 card or two radeon hd 5750 cards for both approximately $300.

the radeon 5750 is pretty much exactly half of the 5850 except that the 5750 still has 1GB memory.

Wouldn't it be more of an advantage to purchase two 5750 graphics cards (using crossfire of course) and have 2GB of memory instead of 1GB memory with the 5850?
January 23, 2010 1:57:47 AM

I saw the 5850 so that if u need the power later on you can get another.....
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January 23, 2010 2:04:04 AM

the motherboard I want has 3 slots for graphics cards, so if I wanted more power later on I could buy another graphics card and plug it in the 3rd slot.
so buying the 5850 to save for more power later on is irrelevant to me.
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a c 202 U Graphics card
a b } Memory
January 23, 2010 2:04:45 AM

the 5750 is exactly half of a 5850 in every way, its got half the memory bus width, and half the SPs. The limited memory bus will restrict performance with higher levels of AA enabled. The two cards also wont perform as addition implies they should because CF does not scale linearly, adding a second card will give you about an 80% increase not 100% like logic would expect. Also when running in CF you only use the memory capacity of a single one of the cards so 2 1GB 5750s only perform as if they had 1GB of memory.

In general its best to use a single card whenever possible to allow for upgrades in the future and a single card tends to yield better performance too.
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January 23, 2010 2:06:09 AM

alright thx, that's what I needed to know. I'll go with the 5850 then =)
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January 23, 2010 2:08:02 AM

alexttlyrocks said:
the motherboard I want has 3 slots for graphics cards, so if I wanted more power later on I could buy another graphics card and plug it in the 3rd slot.
so buying the 5850 to save for more power later on is irrelevant to me.


I'm pretty sure 3 5850s would be lot better than 3 5750's.....heh.
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a b U Graphics card
January 23, 2010 2:27:07 AM

2 x CF/SLI scaling is quite good, however having 3 or more really gives you disappointing returns:
2 x CF = 1.8
3 x CF = 2.5
4 x CF = 3.1
That's a rough estimate.
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January 24, 2010 11:05:22 PM

Best answer selected by Alexttlyrocks.
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