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nvidia and radeon gpu in same machine?


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#1 vigge_sWe

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Posted 22 June 2011 - 04:38 AM

I had a nvidia GTX 460, but I bought a radeon 6870 card for bitcoin mining, as nvidia cards are not very good at it. I wonder, can I somehow use the GTX 460 as main GPU for gaming and 3D, as the 6870 is nowhere near the performance of the 460, and put the 6870 as a secondary GPU, only in use of the bitcoin mining program (guiminer), that supports to chose which device to mine on?

Many people I asked before I bought it, even the guy in the store, said it would work, but now that I bought them everyone seems to have changed opinion about it?

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#2 s1lents0ul

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Posted 22 June 2011 - 06:01 PM

perhaps you need to check compatibility of the cards with your Motherboard first, before trying to get them tow ork. If they are compatible, try choosing default in BIOS.
==]--s1lents0ul-->

#3 the_patriot11

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Posted 22 June 2011 - 10:33 PM

Do you have a motherboard with dual PCI express lanes? you cant link the two together unless you have a hydra enabled board, but you should be able to, in theory run them as seperate video cards. Though, I should say this-Im not sure where your getting your sources, but unless you have a overclocked 460, the 6870 outperforms the 460 in almost every way, and even a overclocked 460 doesnt offer a huge performance increase. A standard 1 gb 460 offers a vantage score of 16320, while the 6870 offers one of 17287. Not a tremondous increase, but one nonethless, and it has several other features the 460 does not have, youd probably need either a 485 on up or a 5xx series nvidia card to beat out the 6870.

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#4 dpunisher

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Posted 22 June 2011 - 10:48 PM

If you are only concerned about mining, you should be good to go, as long as you have the right mobo slots, a decent power supply, and are using WIN7 or XP.

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#5 vigge_sWe

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Posted 23 June 2011 - 05:44 AM

Do you have a motherboard with dual PCI express lanes? you cant link the two together unless you have a hydra enabled board, but you should be able to, in theory run them as seperate video cards. Though, I should say this-Im not sure where your getting your sources, but unless you have a overclocked 460, the 6870 outperforms the 460 in almost every way, and even a overclocked 460 doesnt offer a huge performance increase. A standard 1 gb 460 offers a vantage score of 16320, while the 6870 offers one of 17287. Not a tremondous increase, but one nonethless, and it has several other features the 460 does not have, youd probably need either a 485 on up or a 5xx series nvidia card to beat out the 6870.


Yeha I got 2 PCI-e x16 slots and both cards work separately (When only one of them are installed, I mean).

I don't really know much about performance, but I based that on that on my GTX 460, I could run both Trackmania Nations and Terraria at the same time with none of them lagging, while on the 6870 both lagged. But eh, such performance doesn't matter really, but it's quite hard for me to accept ATI cards as I've been a nvidia fanboy for 10 years now :P

Edited by vigge_sWe, 23 June 2011 - 05:45 AM.


#6 the_patriot11

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Posted 23 June 2011 - 11:45 PM

The ability to multi task is rarely a GPU fault, I dont know which specific cards you have, but the ATI card may take more CPU power to run then the NVIDIA card which may be the limiting factor. Also, if you tried running the ATI card as the primary card, with the NVIDIA card still installed, or with the nvidia drivers installed, this could be the problem as well, ATIs catalyst software has a bit of a dislike for NVIDIA drivers and the two often don't get along when on the same system. Also, keep in mind, slight differences in design focus, ATI Focuses more on the Actual graphics-on the eye candy-while NVIDIA Seems to focus more on achieving the fastest framerate. Theres nothing wrong with NVIDIA or ATI Cards-its a matter of preference, but the 460 is getting slightly antiquated, I would still try removing all NVIDIA drivers from your system and running just the ATI Card by itself and see how it runs, or perhaps save up and by a 560. When you run two video cards in the same system when theyre not linked-as in running seperatly, they will actually slow down your CPUs performance because its having to send seperate sets of commands to each video card, and it doesnt always have a good result unless you have a really powerful CPU, and even then your better with either a single card, or 2 linked cards (SLI or crossfire)

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#7 vigge_sWe

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Posted 24 June 2011 - 04:11 AM

Ah. I think I have decided to sell the GTX 460 though, as the both GPUs didn't fit under each other. One can be put sideways in the case though if I buy an extender, but I am thinking of getting another 6870 then and use crossfire with it :P

#8 the_patriot11

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Posted 25 June 2011 - 01:51 AM

That would be a sweet setup, just make sure your motherboard is crossfire certified, you mentioned earlier you were a NVIDIA fan boy, I would hate to see you buy another 6870 and try to get them to work in a SLI motherboard. I assume, your PSU is strong enough since you were at least attempting to run both the 460 and the 6870 on the system at the same time.

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Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

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#9 vigge_sWe

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Posted 25 June 2011 - 03:50 AM

That would be a sweet setup, just make sure your motherboard is crossfire certified, you mentioned earlier you were a NVIDIA fan boy, I would hate to see you buy another 6870 and try to get them to work in a SLI motherboard. I assume, your PSU is strong enough since you were at least attempting to run both the 460 and the 6870 on the system at the same time.


The mobo is a Gigabyte GA-X58A-UD3R, and it says for multi-GPU support: CrossFireX, SLI, 3-Way SLI.

I got a Corsair CMPSU-750TX 750W, it has 4 connectors for PCI-e, would that be enough?

Edit: Although I've been recommended not to crossfire as it would hurt my bitcoin performance if I do, and I would better just have them installed separately?

Edited by vigge_sWe, 25 June 2011 - 03:56 AM.


#10 killerx525

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Posted 25 June 2011 - 11:30 AM

Yes that power supply should be able to power it up and i believe you just have enough PCI-E power connectors. :thumbup2:

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#11 the_patriot11

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Posted 25 June 2011 - 12:06 PM

I dont know anything about bitcoins, or how it works, crossfiring can slow down overall computer performance, though its usually marginal if you have a powerful system which it sounds like you do. Im running a crossfire setup now without any major issues, but like I said, I cant comment on whether bitcoin will work better or not.

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Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.

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