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Duel video cards?


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#1 xXxexpertxXx

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Posted 19 February 2014 - 11:09 PM

I have a crossfire cable. and i was wondering, I got a new Radeon, r9 270x 2 gigs and a 560 ti! and my MB supports 2 pci slots would it be benificial to be if i connected them both? how much better of a performance would it be?


Edited by hamluis, 20 February 2014 - 01:06 PM.
Moved from Win 7 to Internal Hardware - Hamluis.


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#2 Datcoolguy

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Posted 20 February 2014 - 11:11 PM

Pretty sure if you tried that you actually would get a Duel of video cards, since you can't place an AMD and an NVIDIA card and have them both work together. The crossfire bridge doesn't work with Nvidia and the sli bridge doesn't work with AMD.

 

Also i think newer versions of crossfire are working trough the PCI slots themselves rather than requiring a physicall bridge.

 

Anyways, you CAN'T use crossfire to link an AMD card with an NVIDIA card, no matter what model of each.


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#3 xXxexpertxXx

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Posted 21 February 2014 - 05:51 PM

Pretty sure if you tried that you actually would get a Duel of video cards, since you can't place an AMD and an NVIDIA card and have them both work together. The crossfire bridge doesn't work with Nvidia and the sli bridge doesn't work with AMD.

 

Also i think newer versions of crossfire are working trough the PCI slots themselves rather than requiring a physicall bridge.

 

Anyways, you CAN'T use crossfire to link an AMD card with an NVIDIA card, no matter what model of each.

ok thank you for your input appreciate it,.,also how good is duel video cards i mean if i were to get another 560 and run it with my 560 i have would HOW much better is it?? then just 1 graphics card.



#4 GreenGiant117

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Posted 05 March 2014 - 01:58 PM

 

ok thank you for your input appreciate it,.,also how good is duel video cards i mean if i were to get another 560 and run it with my 560 i have would HOW much better is it?? then just 1 graphics card.

 

 

Depends on your motherboard, you could see up to about a 50% improvement or you could actually see a rather large loss of performance (down to 1/8th to 1/16th original performance), again all depends on your motherboard.

Though to be honest its usually not worth it unless you have a specific need for it, my buddy has a system where he was running an AMD 7870 with eyefinity across 3 monitors, he got another one and connected in crossfire and his gaming performance dropped, he had about a 20% drop in frame rates, and instead of screen tearing one line on one screen he got 2 lines of screen tearing on that one screen. His motherboard was designed for crossfire too.



#5 zingo156

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Posted 05 March 2014 - 02:32 PM

I no longer recommend crossfire or sli either. Heat from the bottom card usually affects the top card. Also the amount of power used can get pretty high. I used to have crossfire and in my computer room the temperature was always high even with a window open in winter. It was a 750 watt space heater before I got my newer more powerful single card. I would always recommend getting the best single card you can afford. If you can afford 2 270x's you could get certain 290x's for the same cost and have less power consumption, less heat. Of course in most situations crossfire 270x's may come out ahead of the 290x in performance. I just do not think the heat and power consumption make it worth it.


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