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Windows 7: Radeon HD 4870 X2 and 4890 Crossfire?


22 Aug 2011   #1

Windows 8 Pro x64
 
 
Radeon HD 4870 X2 and 4890 Crossfire?

I want to upgrade the graphics in my desktop (see system specs) and I've been seeing 4870 X2s on eBay from sellers with very good feedback for around $150-$200. Is it possible to Crossfire my 4890 with a 4870 X2? If not, I will probably still buy the card because dual-GPU and 2 GB of GDDR5 isn't exactly slow

Another issue is I'm not entirely sure if the cooling of my case is enough to do that safely or not... or even if my PSU could handle a triple-GPU setup.


My System SpecsSystem Spec
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23 Aug 2011   #2

Windows 7 Ultimate x64.
 
 

I know the chips need to be the same for nvidia so I suspect it will be the same for ATI, so no, your out of luck.
My System SpecsSystem Spec
23 Aug 2011   #3
Microsoft MVP

Win 7 Ultimate x64
 
 

Can it be done? According to this,

Radeon HD 4870 X2 and 4890 Crossfire?-cf_combo_chart-v02.jpg

yes. The case will probably be fine as long as it has sufficient fans and airflow. Power supply, no idea without seeing the specs on it.


My System SpecsSystem Spec
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23 Aug 2011   #4

 
 

Quote   Quote: Originally Posted by Windows i7 920 View Post
If not, I will probably still buy the card because dual-GPU and 2 GB of GDDR5 isn't exactly slow
It's still only 1Gb usable though.

1GB per GPU that is shared across the cards. Usable VRAM isn't accumulative. The 2GB is technically correct in that the card physically has 2GB - but mentioning only 1GB is usable is not good marketing)

4870x2 + 4890 = no worries.
My System SpecsSystem Spec
24 Aug 2011   #5

Windows 7 Home Premium 64bit
 
 

Quote   Quote: Originally Posted by Windows i7 920 View Post
I want to upgrade the graphics in my desktop (see system specs) and I've been seeing 4870 X2s on eBay from sellers with very good feedback for around $150-$200. Is it possible to Crossfire my 4890 with a 4870 X2? If not, I will probably still buy the card because dual-GPU and 2 GB of GDDR5 isn't exactly slow

Another issue is I'm not entirely sure if the cooling of my case is enough to do that safely or not... or even if my PSU could handle a triple-GPU setup.
Take it from my experience (and I have a good enough idea of one seller you've seen) do NOT buy an X2 off of eBay. You'd be better off buying a 560Ti or something.
My System SpecsSystem Spec
25 Aug 2011   #6

Windows XP
 
 

Quote   Quote: Originally Posted by Windows i7 920 View Post
I want to upgrade the graphics in my desktop (see system specs) and I've been seeing 4870 X2s on eBay from sellers with very good feedback for around $150-$200. Is it possible to Crossfire my 4890 with a 4870 X2? If not, I will probably still buy the card because dual-GPU and 2 GB of GDDR5 isn't exactly slow
.
4870 x2 supports Crossfire.
Here is a promo for 4870 x2 2GB
SabrePC Limited Quantity Sale
$149 plus free shipping for new one.

FYI
My System SpecsSystem Spec
25 Aug 2011   #7

Windows 7 Pro x64 SP1 and Mac OS X 10.8.3
 
 

Quote   Quote: Originally Posted by RST101 View Post
I know the chips need to be the same for nvidia so I suspect it will be the same for ATI, so no, your out of luck.
That is untrue for ATI and AMD cards. AMD does not screw you over with crossfire like Nvida does. With AMD cards you can upgrade and still keep your old card to crossfire with the new one. Besides if you have a newer high end MB you can do hydra setup. Witch you can crossfire/sli any cards regardless if one is ATI/AMD and one is Nvida. Note, the drivers for Hydra a realy still in the beta era. Unrefined I would say.
My System SpecsSystem Spec
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 Radeon HD 4870 X2 and 4890 Crossfire?




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