There are two VS450 models. Which one do you have?
Corsair VS450 (SKU# CP-9020009) Discontinued
• OEM: CWT (Channel Well Technology)
• maximum combined +12 Volt continuous current rating of 30 Amps
• two (6+2)-pin PCI Express supplementary power connectors (F.Y.I. there is a dual +12V rail model with exactly the same SKU# but it only has one 6-pin PCI Express supplementary power connector)
• No 80 PLUS Efficiency Certification
• 3 Year Limited Warranty
Corsair VS450 (SKU# 75-001835 / CP-9020049)
• OEM: CWT (Channel Well Technology)
• maximum combined +12 Volt continuous current rating of 34 Amps
• two (6+2)-pin PCI Express supplementary power connectors
• No 80 PLUS Efficiency Certification
• 3 Year Limited Warranty
For a system using a single NVIDIA Reference Design GeForce GTX 760 graphics card NVIDIA specifies a minimum of a 500 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 30 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors. Some of the non-Reference Design GeForce GTX 760 cards have a single 8-pin (e.g. ASUS GTX 760 DirectCU II OC) or two 8-pin (e.g. MSI GTX 760 HAWK) or one 6-pin and one 8-pin (e.g. Gigabyte GTX 760 WindForce OC, EVGA GTX 760 SC w/ACX Cooler, MSI GTX 760 TwinFrozr Gaming [N760 TF 2GD5/OC]) PCI Express supplementary power connectors.
Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor.
Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.