The PowerColour Radeon X1950 Pro SCS3 is well named when referred to as the Silent Edition.  The huge passive heatsink is larger than the actual card, and provides enough surface area to outperform the active cooling solution on an ASUS EAX1950 Pro.  Elite Bastards tried it out on some of the newer games, including the newly available S.T.A.L.K.E.R., so you can get an idea how that game will perform on a system based around a X1950 Pro.
“We spoke in our introduction of the pitfalls of creating a passively cooled high-end board, and the largest of those pitfalls is, of course, heat output. Which brings us to the monster of a heatsink we have before us – This thing is huge! The solution employed by PowerColor is generally based around Arctic Cooling’s Accelero S2 cooler, and uses quad heat pipes to pull heat from the GPU away from the core, where it is dissipated by the large surface area and fins of the heat sink via cold air moving through the case (thus assuming reasonable ventilation in your chassis of course). The memory on the board also finds itself equipped with heat sinks to pull heat away from the RAM, where once again it is moved away by those thirty-one fins.”

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