Installation & Testing
As we said in the intro CP-Series power supplies only fit in 3 Antec cases currently, the Twelve Hundred, P183, and P193. Luckily we just reviewed the P183 so we have it here to use for this review. With the P183 case you have to remove an ATX bracket on the case so the CP-850 will fit. Once you have it removed you can go ahead and install the power supply by just sliding it in and securing it with screws.
Our system for benchmarking is comprised of a ASUS P6T Deluxe motherboard with a Intel Core i7 965 @ 3.2 GHz, 12 GB DDR3 memory, ATI Radeon 4870 x2, two 256gb ssds, two 1TB SATA drives, and a Blu-ray drive all inside the Antec P183 case, which has 2 120mm fans.
Initial spot checks at idle showed 3.30V, 5.04V and 12.04V on the 3.3V, 5V, and 12V rails respectively. We used OCCT Perestroika to do load testing. Here are the output graphs comparing the voltages of the CP-850 with the Antec Truepower 1000W. The CP-850 graphs are on the left and the Truepower 1000W’s are on the right.
The 3.3V did undervolt, but it was within the +/- 5% we like to see. It was definitely much more stable that the Truepower 1000W results.
The 5V rail under load was also very stable and rippled within our +/- 5% that we like to see.
The 12V rail was also very stable, with only a few ripples. Once again if you compare the graphs the CP-850 is definitely more stable that the Truepower 1000W.