I have a cMP 3,1 with a HD Radeon 7970 GPU. CPUs are a pair of X5272s (2-core at 3.4ghz), RAM is 16GB at 800mhz (8 x 2GB). Running 10.11.6 on a SSD using one of the SATA II drive bays. For monitors, I'm running a pair of ACD 23" aluminum versions. Running Unigine Valley on high settings (not Ultra), I'm only averaging around 27fps. With the same card on my 4,1 (flashed to 5,1) I get an average framerate of 50fps... however, that is a 12 core machine with more RAM (24GB). What is keeping the GPU from reaching the performance figures I know its capable of? Is there something I'm missing or lacking?