Been testing these 3 coolers for the past few days...if I can find the strength and will to take decent pics, I will submit it as a full review Until then it's just a quick summary. First, test settings... AMD Opteron 146 @ 2.9GHz 1.45V, SI-120 + Delta 120mm 74cfm DFI nF4 Ultra-D, Evercool VC-RE chipset cooler 2x512MB OCZ Value VX RAM Cooler Master Centurion 530 case Enermax 535W Noisetaker PSU The guinea pig...HIS X1800GTO flashed to 16 pipes, clocked at 612/612 for all temperature testing. Voltages were 1.200 VGPU / 2.004 MVDDC / 2.004 MVDDQ. Arctic Ceramique used for all heatsinks except the stock cooler. Notes for each cooler... VF900 You can read Chai's full review of the VF900 here: http://www.techarp.com/showarticle.aspx?artno=327&pgno=0 I can see why it was awarded the reviewer's choice award, I like it very much as well and am keeping it permanently. Flawless base, tool-less installation, great performance Sytrin VF1 This cooler was a pain in the despite rave reviews around the net. As our fellow forum member commented previously (see link below), the screws provided interfere with installation if your graphics core has a shim around it. Imagine that...incompatible with so many graphics card out of the box, and without warning. http://forums.techarp.com/showthread.php?t=19866 I have the non-Plus version for which you use your own axial fan, and none of the screws they provide were able to mount the fan to the bracket at all. Terrible. Also, out of the two I purchased, one had a visibly convex base. Thermalright V1 Product link: http://www.thermalright.com/a_page/main_product_v1.htm Installation is a bit tedious (especially after trying the VF900 ). Performance is not too bad...however, it was intended to have the fan cooling the top portion of the heatsink which hovers on the top side of the card (see product pic at Thermalright's website). If your CPU socket is too close to the graphics card slot, then this will be a problem as it was in my config. I tested this heatsink with an NMB 80mm fan (2500rpm) tied to the bottom portion of the heatsink (referred to as "V1 single" config in the temp graph) and with the original 80x15mm fan cable tied to blow more-or-less at the top portion where it was intended to ("V1 dual"). Test results Stock cooler fan was locked at 70% speed (5100rpm according to RivaTuner) Zalman VF900 was tested with its fan at full speed (2500rpm). Sytrin VF1 was tested with a Delta 92mm fan (AFB0912HH, 58cfm, 38dBA) mounted on the supplied PCI bracket blowing at the heatsink. High setting was full 3000rpm (quite loud!) and low was 2000rpm. V1 config was explained earlier.