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Power supply requirement:Thermaltake vs ATI Radeon

Last response: in Components
August 4, 2009 9:32:35 PM

In Thermaltake website (, using power supply calculator Thermaltake suggest that TR2-420W power supply is enough for the following configuration PC.

System Type: Single Socket
Motherboard: High end Desktop

CPU: Intel Core 2 Quad Q9650 3000 MHz (CPU Utilization: 100% TDP)
RAM: 4 Sticks DDR2 SD RAM (4GB)
Video Card: ATI Radeon HD 4850 (Video Type: Single Card)
Hard Drives: SATA 1HDD
DVD-RW/DVD+RW Drive: 1 Drive

System Load : 100% (peak load)

After Calculation The recommended PSU Wattage is 306W. And the pop up comes along with the calculation page suggesting TR2-420 W Power supply.

But according to ATI Radeon the HD 4850 card requires minimum 450W PSU.

Now I want to know whether 420W PSU is enough for the card or not.

August 4, 2009 10:01:59 PM

I'd go with the 450 figure at the least. You want some headroom between your estimated usage and PSU rating.
August 4, 2009 10:12:30 PM

for real