Tom's Hardware > Forum > Graphic & Displays > ATI > Would 2 4870 1 GB's in crossfire be the same as a 4870x2?

Would 2 4870 1 GB's in crossfire be the same as a 4870x2?

Forum Graphic & Displays : ATI - Would 2 4870 1 GB's in crossfire be the same as a 4870x2?

Tom's Hardware: Over 1.4 million members in 6 different countries available to answer all your high-tech questions. Sign up now! Its free!

Ask the community Add a reply

Bottom Search this thread

I have an MSI HD 4870 1 GB and im looking to upgrade my rig to 2 graphics cards. but would 2 4870's in Crossire be the same performance as a single 4870x2? i mean im pretty sure the 2 in corssfire would have better cooling but like whats the difference?

Add a reply

Not, the performance isn't the same. Whe you have a crossfire, the cards divide the process between they BUT not add their memories. Whe you have a single card like the 4870x2, is an only card that have 2 cores for procesing BUT with a memory sure of 2GB in this case.

------------------------------ If you like my answer, select me as the best answer.
------------------
"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.". Albert Einstein.
------------------
Reply to saint19

^WRONG

4870X2 still has only 1GB of memory available for each core

Message quoted 1 times

Reply to Kari

Kari wrote :

^WRONG

4870X2 still has only 1GB of memory available for each core

-----------------------------------

Right? ok, so i'm wrong......

2 4870 1GBs in CF should be faster than a 4870x2 IF you have at least 2 PCIe2.0 8x lanes.

So go for the CF 4870s.

Message quoted 1 times

------------------------------

http://www.steamcalculator.com/76561197970703804/camo_sig.png

Reply to jimmysmitty

Explain.

I have never seen any measurable difference in any benchmarks.

Are you making reference to the interconnnect between the two gpu's on the x2?

------------------------------ I'm a git, deal with it.

Antec 1200,PC Power & Cooling 750,Gigabyte DS4-x48,Intel Q9550@3.4 W/Xigmatek S1283,8GB OCZ DDR2 800,ATI 4870X2,X-FI>CA 640C amp>Tannoy R300/Senn 595's
Reply to strangestranger

Its basically the same. Why bother asking questions I really doubt you got $400 tospend on a x2 so whats the point.

Reply to daship

How do you know how much he has to spend?

jimmysmitty wrote :

2 4870 1GBs in CF should be faster than a 4870x2 IF you have at least 2 PCIe2.0 8x lanes.

So go for the CF 4870s.

No they shouldn't...

The clock speeds are the same, the x2 has 8x per card, which is the same, the graphics cores are the same. In basically every way, the 4870x2 is identical to a pair of 4870s in CF on 8x slots. On 16x slots (for both cards), the pair of 4870s would have more bandwidth, but I'd be surprised if it made a significant difference.

Honestly, for all practical purposes, they are identical in performance.

------------------------------ Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
Reply to cjl

Actually isn't the link between the cores only a pci-e 1.1 connection.

Ask the community Add a reply

Tom's Hardware > Forum > Graphic & Displays > ATI > Would 2 4870 1 GB's in crossfire be the same as a 4870x2?

Go to:

Help |
Forum rules

There are 1321 identified and unidentified users. To see the list of identified users, Click here.

Page generated in 0.323 seconds

Focus On

Would 2 4870 1 GB's in crossfire be the same as a 4870x2?

Forum Graphic & Displays : ATI - Would 2 4870 1 GB's in crossfire be the same as a 4870x2?