I just bought my KT7A Raid last week with a 1 Gig T-bird and a "silver orb" fan/heatsink. It's a very close fit indeed, however, it works very well. You need to understand how this things attaches before you start. Once you do it's no problem. The latch goes towards the power supply. If you install backwards, it will not be centrally located over the processor and if you force it you may break your processor. Even when installed the correct way locking down the latch is tricky - don't press on the heat sink - press down on the latch until it engages the clip.