Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Can i crossfire a 4870x2 and a 4870

Can i crossfire a 4870x2 and a 4870

Forum Graphic & Displays : Graphics Cards - Can i crossfire a 4870x2 and a 4870

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
Word :    Username :           
 
georgep001   08-16-2008 at 02:43:15 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

Add a reply
Sponsored Links
Register or log in to remove.
doomturkey   08-16-2008 at 02:49:26 AM
- 0 +

Yeah you should be able to. As long as your PSU can handle it.

Reply to doomturkey
invisik   08-16-2008 at 03:11:04 AM
- 0 +

yup u can!
=]
make sure there both clocked the same in case u oc either cards.

------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
Reply to invisik
foxhound009   08-16-2008 at 03:19:53 AM
- 0 +

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

Message quoted 1 times
Reply to foxhound009
doomturkey   08-16-2008 at 03:35:12 AM
- 0 +

foxhound009 wrote :

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?

------------------------------ Q6600 @ 3.6ghz|ASUS P5Q pro|Powercolor HD4870|8gb OCZ reaper DDR2 800 @4-4-4-12 1:1|WD caviar 640gb + Samsung Spinpoint 500gb|Antec 900|PC P&C Silencer 610W|Xigmatek HDT S1283|X-fi platinum
 Reply to doomturkey
georgep001   08-16-2008 at 04:14:04 AM
- 0 +

i already have 2 4870s im giving one back for a 4870x2 and i have a 650 watt cooler master extreme power duo


Message edited by georgep001 on 08-16-2008 at 04:28:01 AM
Reply to georgep001
aevm   08-16-2008 at 09:09:30 PM
- 0 +

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.

Reply to aevm
georgep001   08-16-2008 at 11:42:11 PM
- 0 +

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.

Reply to georgep001
dagger   08-17-2008 at 12:15:48 AM
- 0 +

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

------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
Ask the community Add a reply
Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Can i crossfire a 4870x2 and a 4870
Go to:

There are 1166 identified and unidentified users. To see the list of identified users, Click here.

Forum map
Bestofmedia Forum ©
2000-2009 Bestofmedia Group
Page generated in 0.355 seconds
Please mind

You are about to answer a thread that has been inactive for more than 6 months.
If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.

Add a reply Cancel
Sponsored links
  • Ask the community now
  • Publish
Ad
Related Topics
See all relatives topics
They won a badge
Join us in greeting them
How do I win badges?