GTX 780 clock rates

[manalokos]

We recently assembled a new machine with 4 GTX 780 and I noticed that there is a difference in clock rate between them:

two of them are at 880 MHz and the other two at 995 MHz.

Why is this happening and how can I make them all equal?

Thanks.

Best regards
Filipe

[glimpse]

might be a case where let's assume middle ones are more hot and they are downclocked in order to remain at given temperature target =) on the other side.. I had two identical cards in my rig that had 2.5 slot spacing /air wasn't an issue, 'cos they stayed in open rig /without case at all =p but when I openened GPU-Z, program told that these where runin' at diff clocks. I switched these, but then again, first cards was running more hot had different clock speeds..- from that I can only get to conclusion that some motherboards do interact with cards and influence very much how do they perform..

so it's hard to tell exactly from what we got, but I believe it might be connected with temperature =) at least that's what boost 2 /or how they call it =) does..it simply adjusting voltage and clocks to meet certain temperature target =) so it might be nothing wrong with Your rig..it just trying to keep everything under control =)