Sign in with
Sign up | Sign in
Your question

Can i crossfire a 4870x2 and a 4870

Last response: in Graphics & Displays
Share
August 16, 2008 12:43:15 AM

well i talked my fiancee into it i just ordered a 2nd 4870 but it wont be at the store till monday im thinking of just giving it back and getting a 4870x2 my question is i already own a 4870 can i still crossfire a 4870 and a 4870x2 if i order a 4870x2

More about : crossfire 4870x2 4870

August 16, 2008 12:49:26 AM

Yeah you should be able to. As long as your PSU can handle it.
a b U Graphics card
August 16, 2008 1:11:04 AM

yup u can!
=]
make sure there both clocked the same in case u oc either cards.
Related resources
Can't find your answer ? Ask !
August 16, 2008 1:19:53 AM

yes you can.. but it will work just as if you had crossfired 2x 4870's
so you'll be wasting a lot of power...
in other words....

if 2x 4870 CF is as powerfull as 4870x2
you'll gain no performance over an standalone 4870x2 with an extra 4870...

so.. I think you have got 2 option here.

either wait untill you can get second 4870,

or buy 4870x2 and sell your old 4870
(you can use that money and a little extra to buy another 4870x2 and then CF)
hehe but seriouslly... what's ur PSU
August 16, 2008 1:35:12 AM

foxhound009 said:
yes you can.. but it will work just as if you had crossfired 2x 4870's
so you'll be wasting a lot of power...
in other words....

if 2x 4870 CF is as powerfull as 4870x2
you'll gain no performance over an standalone 4870x2 with an extra 4870...

so.. I think you have got 2 option here.

either wait untill you can get second 4870,

or buy 4870x2 and sell your old 4870
(you can use that money and a little extra to buy another 4870x2 and then CF)
hehe but seriouslly... what's ur PSU

You can't say he'll gain no performance. Cause he will gain some, it just won't be as big as going from one 4870 to 2 4870.
And I second the question, what PSU do you have?
August 16, 2008 2:14:04 AM

i already have 2 4870s im giving one back for a 4870x2 and i have a 650 watt cooler master extreme power duo
a c 143 U Graphics card
August 16, 2008 7:09:30 PM

OK, 650W is too little for HD 4870x2 + HD 4870. Reviewers for the HD 4870X2 recommend 700W for a system with HD 4870X2 alone. At a minimum I'd recommend Antec TPQ-850 or Toughpower 850W. Also, CoolerMaster PSUs are not among the best.

To the guys who say HD 4870X2+HD 4870 works: do you know this for a fact, or are you just assuming it will work because it's logical and desirable? There's a difference, you know... For example HD 4870+HD 4850 works, but HD 4870+HD 3870 doesn't, and AMD has confirmed it never will.

One more thing: HD 4870X2+HD 4870 means 3 GPUs. Windows XP drivers will be limited to 2 GPUs, AFAIK. That is, if HD 4870X2+HD 4870 works, you will need Vista to make it work. Also, considering the amount of video RAM involved, you should have a Vista 64-bit version. With a 32-bit version, the memory space left for addressing system RAM will be way too small and performance will be hurt.
August 16, 2008 9:42:11 PM

anything thats in the same seies will work a 4870 and a 4850 can be cf cause there both 4800 series graphics cards a 4870x2 and a 4870 should be able to be crossfired since there still both 4800 series cards.
August 16, 2008 10:15:48 PM

Those are single cards. I'm not sure is there are drivers out yet that support crossfirex when an x2 card is involved.
!