Frostytech have a review up on the Scythe Infinity heatsink - according to Frosty, this is one of the ten best Intel and AMD heatsinks they've tested. Nice.
"Now as you've come to expect with Frostytech, we'll skip the suspense and just tell you straight up - the Scythe Infinity is an excellent heatsink. It is currently one of the Top 10 Intel/AMD heatsinks we've tested in fact. The Infinity runs cool, and it runs fairly quietly too. Excellent attributes for sure, but because of its large size, compact PC cases may not be able to accommodate it.
The Infinity is a big heatsink for sure; it stands 155mm tall, 125mm wide and about 114mm deep with its 120mm 1200RPM fan. The scale tips at 960 grams, or just short of a kilogram."