Will this PSU be enough? 320W + 450W

Cpu: Intel Core i5 650 @ 3.20 ghz and upto 3.33 ghz with turbo boost

Ram: 4GB 1333MHZ (upgrade ram later)

Psu: 320 watts for my cpu and an (((((external FSP Booster X5 450watts independent/supplementary power supply)))))) for the "AMD Radeon R9 280X" Only.

http://www.amazon.com/FSP-Certified-Crossfire-PCI-Express-X5/dp/B002IZE5RE/ref=sr_1_1?ie=UTF8&qid=1385411289&sr=8-1&keywords=fsp+group+booster+x5+450w

will this be enough power?

320 WATTS FOR THE REST OF THE COMPUTER AND A SEPERATE 450W FOR THE GRAPHICS CARD ONLY WHICH IS ((Sapphire AMD Radeon R9 280X Vapor-X OC 3GB))

I ndid this because my pc is an oem pc HP WHICH MEANS I CANT upgrade my power supply.[/quotemsg[strike][/strike]


Wait your trying to run TWO PSUs just because the computer is OEM? That is rubbish, high risk, and NO you can't just dedicate a second power to the card to 'add' power to the computer, that isn't how it works. If you read the description the add on power is to assist with TWO CARD rigs (SLI / Crossfire) not a cheap work around because your not wanting to change out your OEM powersupply like everyone does. This product listed would be helpful to add to the power the two cards are already getting (at least 750W already - see below) from the MOBO, but there isn't enough power for the add on connections DIRECT from the PSU. That is how the device would 'fill the gap'.

The card sits and is FIRST powered by the slot, which requires a level of power output equal the the minumum requirements of the INSTALLED PSU to the MOBO. Secondary power inputted to the card is a direct draw feed to energize and power the multiple cores of multiple card we see now on the higher end videocards. That said per http://www.sapphiretech.com/presentation/product/product_index.aspx?pid=2024&lid=1# states "750 Watt Power Supply is required.
1000WattPower Supply is recommended for CrossFireX™ System." so you need to replace IN YOUR COMPUTER the powersupply with a 750W like everyone else, if not a KILOWATT (1000w) if you plan to Overclock or add a second card later.

If your case is small and you want to upgrade the system to include a high end video card, then you need to upgrade the case as well (plenty of us do that too) with the PSU, then move all the hardware into the new case. IF your PSU just sucks in the computer, then just replace it with a new one instead of trying to 'short cut' . REMEMBER: ONE SMALL FOOT DRAG across the floor then touching the CPU/GPU will FRY the card, what do you think monkeying with the powersupply instead of 'doing it right the first time' would do?