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Installing Radeon and Nvidia together

post #1 of 8
Thread Starter 
Alright that's enough guys, The 460 is for gaming, the 5970 is for OpenCL processing

I got it working, thread has served its purpose. Move along now.


Okay so I have a GTX 460 as my primary video card and a Radeon 5970 as a secondary card

The 460 is installed/in use for a while, working

Just put in the 5970... Is there anything special I need to do since its a secondary card of a different brand during driver install? Do I need to hook a display to it to make sure it is active?

Edited by TitaniumClocker - 4/28/11 at 2:58pm
 
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post #2 of 8
why completely different cards?

idealy, the 460 would be used as physx, where as the 5970 would be the main.

but still, why? you dont fold?
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post #3 of 8
ati allow you to do this you don't need to the same 2 card to have crossfire
post #4 of 8
5970 needs to be the primary, and you can use the 460 for physX/folding
    
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post #5 of 8
Thread Starter 
The 460 is for gaming

the 5970 is for OpenCL work only, I dont care to game on it. I bought it specifically for OpenCL processing only.

Displays are plugged into both, Rivatuner/Precision/Afterburner see all 3 GPUs now
 
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post #6 of 8
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post #7 of 8
Quote:
Originally Posted by Vlasov_581;13310331 
5970 needs to be the primary, and you can use the 460 for physX/folding

This is the only sensible option. Nvidia only allow two (or more) identical cards to work together at the same time and while AMD is a little more lenient, their policy is two cards in the same series (i.e. 5870 = 58-- series, so it would work with a 5870 or a 5850, but not a 5770 or a 6870). However, the faster card will slow down to match the performance of the slower card, effectively making the 5870/5850 crossfire more of a 5850/5850.


In this case, the only way to get two different types of card to work together would be through Lucid Hydra - a feature/chip that would have to come with your motherboard.


The problem with it is that it's not... Great. Occasionally it gives staggering performance gains, but more often than not, the gain is either marginal, or non-existent. As a technology, think of it more as a trial drug in medicine. Occasionally it has great results, but sometimes it does nothing and sometimes it hurts the patient with its side-effects.


What I'm trying to say here is that there is an option, but you shouldn't take it.

(buying a new motherboard to run two GPUs = not a great idea. Especially if you'd be relying on the Lucid Hydra technology).



The only other option that presents itself is to use your 460 as a PhysX card. What that means is that in certain games that use PhysX (e.g. Mirror's Edge, Arkham Asylum or Mafia II), your 460 would be used for Physics processing. The 5970 is a superior card, and should be your primary, regardless of what else you do.


However, since Nvidia don't like enabling PhysX for their competitors you're going to have to hack in support. It's nice an easy. Please take a look here for more help.

If you're interested, here's a full list of games supporting PhysX:
http://en.wikipedia.org/wiki/PhysX#Use

The official FAQ on PhysX:
http://www.overclock.net/nvidia/589202-faq-physx.html


I hope that helps smile.gif

Edit:

Why not game on the better GPU? Also, when talking about using them together, I was referring to only gaming. Obviously different applications can use different GPUs. Folding included.


Double Edit:

If you go to the bottom of this page:
http://www.guru3d.com/article/radeon-hd-6790-review/13

You'll see a chart showing average framerates in Crysis Warhead (one of a number of games in that review). You'll see the 460 1GB getting around 36 and the 5970 getting around 61. Nearly twice the graphical performance.
Edited by Korlus - 4/28/11 at 2:59pm
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post #8 of 8
Thread Starter 
Alright that's enough guys, The 460 is for gaming, the 5970 is for OpenCL processing

I got it working, thread has served its purpose. Move along now.
 
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