On 16.12.2014 15:54, Albert wrote: > really? Maybe you need 3 x E5-2680v2 for 3x GTX980 to gain best > performance? This can't, afaik, be done. The E5-2600 family is "two cpus" only. What you could do is to put two E5-2697v3 into your 2011-3 mainboard (if the budget boundary isn't crossed). Regards M.