I have a massive performance drop when I enable SLI (Core I5 650 and GTX760 SLI)

deanesterhuizen

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Mar 27, 2014
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Hi guys

Just installed 2nd GPU (for SLI)

I have a massive performance drop when I enable SLI (maximize 3d performance) in Nvidia control panel.
After I enable it and run 3dMark (Firestrike) it drops to 10 frames vs. 30 frames without SLI enabled. (doing just the fist test)

Is my CPU the problem?

- Intel® Core™ i5-650 Processor (4M Cache, 3.20 GHz)GA-P55A-UD4P
- 8 GB RAM
- GA-P55A-UD4P
- 2 x GIGABYTE nVidia GeForce GTX760 OC - 4096MB GDDR5, 256-Bit Memory Bus, PCI Express 3.0 – SLI
- Cooler Master GXII 650W
 


They are only 170w cards and as I have had SLi'd 170w cards running on a 620w PSU I would have to disagree with you on that.
 
Definitely not the PSU. If you had insufficient power to a component, the PC would BSoD or just shut down. Almost definitely your CPU is bottlenecking your system. If you are limited in funds I'd recommend taking one of the 760's back and getting a new mobo + latest gen i3-4xxx or an I5-4xxx if you can muster a little more cash.