Swapped out my Pentium D 3.46Ghz 955XE Extreme Edition for my Intel Core 2 Duo E6600 B1 Step 5 cpu to see how well the Scythe Infinity cools compared to other air and water cooling I tried. Cooling used: stock Pentium D 2.8Ghz 920D heatsink + Sunon 80x25mm 49cfm fan Thermaltake Big Typhoon + Thermaltake 120x25mm 81cfm fan Scythe Infinity + 2x Thermaltake 120x25mm 81cfm push-pull Corsair Hydrocool 200EX + Thermaltake Big Typhoon LGA775 mounting gear Swiftech G4 Storm Water + Thermochill 120.3/MCP650 Pump A few notes: This is first time i have used my E6600 B1 cpu since i re-lapped the IHS, first lap was half ass job with alot of scratches but this time it's alot smoother and shiny. Please keep in mind other results were done at different room ambient temps compared to current Scythe Infinity tests. I'm using a different power supply, before it was either 700W OCZ GameXStream or 1KW PCP&C SLI psu. Now, I am using the new 850W OCZ GameXStream which has 4x +12v rails rated at 20 amps each - of which 2x +12v rails are for independent PCI-E connector power. I've figured out how to use Intel D975XBX Bad Axe's Intel Desktop Utilities (IDU) application which reports temps, vcore etc. It seems if at any time within a windows session you load cpuz, clockgen etc, you will cause IDU to freeze or hang. The only way for IDU to work properly is if within the windows session you don't load cpuz or clockgen if you intend to run IDU. Due to IDU issue and fact D975XBX Bad Axe board from bios only allows max 400fsb, it means for tests at >400fsb that require increasing fsb from clockgen, I will have to only use coretemp app to show temps and not use IDU. System: Intel Core 2 Duo E6600 QPGE B1 Step 5 ES Scythe Infinity + 2x Thermaltake 120x25mm 81cfm push-pull Intel D975XBX Bad Axe rev304 1334 bios 128MB Gainward FX5200 PCI card 2x1GB Gskill PC6400PHU2 HZ Micron D9GMH 0629 batch 3x 320GB Seagate 7200.10 SATAII hdds Pioneer DVD-RW Burner 1.44MB FDD 850W OCZ GameXStream How does Scythe Infinity compare to other cpu cooling solutions I have used on the Intel D975XBX Bad Axe platform ? E6600 stock @2400Mhz at 1.275v (bios = 1.254v) Dual stressprime orthos small FFTs load with Coretemp temps reported for: ======================= Room temp: ~20-22C Cooling used: stock Pentium D 2.8Ghz 920D heatsink + Sunon 80x25mm 49cfm fan Bios idle: 52-56C Windows idle: 40-43C Windows load: 74-75C Rise above ambient delta = 53-55C Rise above windows idle delta = 32-35C ======================= Room temp: ~21-24C Cooling used: Thermaltake Big Typhoon + Thermaltake 120x25mm 81cfm fan Bios idle: 38-40C Windows idle: 32-33C Windows load: 47-48C Rise above ambient delta = 24-27C Rise above windows idle delta = 13-16C ======================= Room temp: ~20-22C Cooling used: Corsair Hydrocool 200EX + Thermaltake Big Typhoon LGA775 mounting gear Bios idle: 31-32C Windows idle: 24-28C Windows load: 36-40C Rise above ambient delta = 18-20C Rise above windows idle delta = 12-16C ======================= Room temp: ~26-28C Cooling used: Swiftech G4 Storm Water + Thermochill 120.3/MCP650 Pump Bios idle: 32-36C Windows idle: 31-33C Windows load: 37-44C Rise above ambient delta = 16-18C Rise above windows idle delta = 11-13C ======================= Scythe Infinity + 2x Thermaltake 120x25mm 81cfm push-pull Room temp: ~27-29C Cooling used: Scythe Infinity + 2x Thermaltake 120x25mm 81cfm push-pull Bios idle: 40-43C Windows idle: 35-36C Windows load: 50-51C Rise above ambient delta = 22-24C Rise above windows idle delta = 15-16C Idle Dual Stressprime Orthos small FFTs load .