I'll ignore that comment On the HD7970 the Dell monitors will be connected like so: Monitor 1 - DVI - DVI Monitor 2 - MiniDP to DP (adaptor included) Monitor 3 - MiniDP to DP (you may need an adaptor here) You shouldn't have any issues barring the need for an additional Mini DP to DP adaptor as there is only one in the box (per my bundle). Your current HD5870's will be connected like: Monitor 1 - DVI - DVI Monitor 2 - DVI - DVI Monitor 3 - DP to DP Barring and additional adaptor you are set to go. Driver quirks aside you shouldn't have any issues. In terms of grunt your HD5870's should still hold their own (lets assume you get at least 80% scaling). The 1GB VRAM they have is the main problem for Eyefinity.