The Thermaltake Toughpower GF3 850W wins in 3 out of 9 comparable specs, with 5 ties. Its biggest advantage is 12VHPWR Connector (100% better).
Focus GX-850 wins in 1 spec (PCIe Connectors: 100% better).
Recommendation
Choose Toughpower GF3 850W if you want the best overall performance — especially 12vhpwr connector.
Choose Focus GX-850 if pcie connectors matters more to you.
