The heatsink base is larger, too, and is covered with ARCTIC MX-1 thermal grease:
As you can see, the retention mechanism is different from the one used on Accelero S2, so the S1 cooler fits on a smaller list of graphics cards. To be more exact, this cooler can only be installed onto AMD Radeon X1950, X1900, X1800 series and NVIDIA GeForce 7950, 7900, 7800, 6800 series solutions.
For our tests today we will use Radeon X1950 XT graphics card from Sapphire. This is what it looks like with Accelero S1 cooler installed:
And this is the same graphics card and cooler with the 120-mm fan attached to it the way we have already described above:
You can easily notice that the fan was shifted a little bit so that the airflow from it could also get to the PCB power elements.
Arctic Cooling Accelero S1 is selling for $29 USD. In conclusion I have to add that both S1 and S2 models come with 6-year manufacturer’s warranty.