whats better hd4870 x2 or 2x hd4870 cross fire - Overclock.net

stanton4958 · 09-18-08

if any one out there has had two hd4870 on crossfire with 790fx chipset,can you let me no if i should get the hd4870x2 or shall i get another 4870 on crossfire

SyncMaster753 · 09-18-08

there's no reason for it not to work,

you could get either a 4870, or 4870x2 and crossfire it with your current 4870

i would recommend adding a single card though, and i think having 512mb of video memory on the single card (your current 4870) will force the X2 to only use 1gb of its 2gb of memory when in cf-X

not entirely sure about the last part though....and video memory is not your concern at anything below 2680x1600

EDIT: nothing will use tri-fire 4870's to it's full potential for a long time, and if your PROC is running under 3.0ghz, it would probably bottleneck tri-fire slightly

jcettison · 09-18-08

Two 4870 512mb on Crossfire > One 4870 X2 2gb

However, remember that the 4870 X2 is a single card which can be put on Crossfire as well.

korosu · 09-18-08

Why choose? Get an X2 and 2 4870s!

**ericeod** · 09-18-08

There are some reviews and benchmarks here on OCN. I'm looking for them now. But my understanding is the 4870x2 is better yhen the 4870 CF at higher resolutuions. Other then that, they are about the same.

edit: Update

4870x2 or 2 x 4870?

Quote:

Originally Posted by sLowEnd

4870X2

The extra memory helps at higher res

Here's some reviews for you
(Keep in mind, they are a bit dated, so driver performance should be better by now)

http://www.guru3d.com/article/radeon...ew-crossfire/1

http://www.hardwarecanucks.com/forum...rd-review.html

http://www.tweaktown.com/reviews/154...rex/index.html

http://www.overclockersclub.com/revi...pphire_4870x2/

Wrong. All multi-gpu configurations have microstutter
Not just dual gpu cards

Quote:

Originally Posted by Robilar

I have had both, 2 4870's and now a 4870X2

They score exactly the same in benches.

At higher res (1920x1200 and above) there is a slight advantage to the X2 due to ram.

also its cheaper

you can add a second one.

you only need two pci-e power connectors instead of 4

the fan actually works properly....

On that, I would save some $$ and just get the 4870X2.

skugpezz · 09-19-08

Quote:

Originally Posted by ericeod

There are some reviews and benchmarks here on OCN. I'm looking for them now. But my understanding is the 4870x2 is better yhen the 4870 CF at higher resolutuions. Other then that, they are about the same.

edit: Update

4870x2 or 2 x 4870?

On that, I would save some $$ and just get the 4870X2.

yea they are the same but 4870 x2 gets the lead in rez with more ram per gpu

fade2green514 · 09-19-08

more ram, less microstuttering because they don't have to copy the information to two sets of ram... just get the 4870x2.

also beware of compatibility issues with the pci-express x16 1.0 slots. 2.0 has a much higher chance of working properly with it. some people have had issues with their 4870x2's where only one GPU does any work and the other one just sits there producing heat, and using watts.

Jehan · 09-19-08

The drivers for CrossFireX are pretty crap at the moment to be honest. A lot of people have seen a decrease in performance when using two 4870 X2s over one. That will surely change when better drivers are released.

ZealotKi11er · 09-20-08

4870X2 is better but you have to wait for better drivers.

stanton4958 · 09-21-08

looks like i will sell my 4870 and get the 4870x2 then thanks alot

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whats better hd4870 x2 or 2x hd4870 cross fire

09-19-08	#8 (permalink)
Jehan New to Overclock.net Join Date: Jul 2008 Location: Surrey, England Posts: 509 Rep: 7 Unique Rep: 6 Trader Rating: 0	The drivers for CrossFireX are pretty crap at the moment to be honest. A lot of people have seen a decrease in performance when using two 4870 X2s over one. That will surely change when better drivers are released.

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