The Memonex MOD EX 600W power supply performed quite well, but the arrangement of the modular cables and power supply sockets is flawed and, for this reason alone, it shouldn't be used with a single high end graphics card or dual card configurations. The inclusion of only two SATA power connectors will severely limit its usefulness, especially in the enthusiast market, two just isn't enough! The electrical performance of the Memonex MOD EX 600W was quite good, but it has poor efficiency at full load. It's certainly capable of powering an internet or office PC with a single PCI-E connected mid range graphics card, but for anything requiring more power, especially on the PCI-E front, the Memonex isn't recommended.