The Zalman TNN500A comes with two such units: the longer is for ordinary GPUs and the shorter is for GPUs whose protective frame protrudes above the die surface. The snapshot below shows you the bases of these units with the fastening brackets, which can be moved and rotated for an easy installation on any graphics card.
A GeForce FX 5200 graphics card didn’t die during the installation into the Zalman TNN500A, although got very close to that at moments. You know, it takes quite an effort to put the graphics card into this system case. It is practically impossible to insert the card into the AGP slot and lay its bracket on the vertical aluminum bar that holds down expansion cards without applying brute force. I could only install the card easily, like in an ordinary case, after I unscrewed that bar and put it back only after the card was in its slot.
Getting some experience with graphics card installation, I went for a risk and, against Zalman’s recommendations, installed a powerful card from PowerColor based on a new-generation graphics processor, the RADEON X800 Pro from ATI Technologies.
I used the short fastening unit for that graphics card:
I had no problems installing it onto the RADEON X800 Pro:
I will try to prove Zalman’s claims that the GPU cooling system can handle up to 50W of heat. Power consumption and heat dissipation of the RADEON X800 Pro are similar to that value (according to this article called Power Consumption of Contemporary Graphics Accelerators. Part I: Graphics Cards on ATI Chips).