Corsair AX850 Watt Gold Professional Series Power Supply Unit. The Ax850 Professional Series came out around 2010… 2013, I order a second but they was out of stock / back order. Instead they sent me the Ax1200 Gold Professional Series Psu and no, I wasn’t upset at all. Here’s my point. Ax850 Professional Gold Series Psu has about 2 years of performance time log in on it. In a smoke free environment. Please examine this item carefully, high res photo’s will reveal all. I blew off the. On all cables under low pressure. No force air was directly or indirectly applied to the actual power supply unit itself.