Power supply requirement:Thermaltake vs ATI Radeon

In Thermaltake website (http://www.thermaltake.outervision.com/), 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.
3 answers Last reply
More about power supply requirement thermaltake radeon
  1. I'd go with the 450 figure at the least. You want some headroom between your estimated usage and PSU rating.
  2. for real
  3. If you aren't adding much more hardware then go with this psu:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139003

    If you want more headroom for a more powerful video card later down the road then spend the extra few bucks now and avoid having to replace the psu along with the new card. This is the best buy atm from Corsair:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005
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