As soon as I can get OS, I'll post temps w/ my Arc system with factory fans.
Core i7 920 with Scythe Mugen v2 CPU Cooler with NZXT 120mm Fan 1300 RPM, 47.27 CFM / 25.35 dBA, EVGA X58 (extended ATX), 295 GTX, Mushkin 4GB DDR3, Mushkin Callisto SSD, and NZXT 850 PSU with 140mm cooling
X58 is E-ATX , which explains why cable management holes are partially covered on other side.