Video card help

[peter2004]

ok my new computer is a gateway now it has a hd 3450 and right next to it is the tv turner, and because of the turner it's a tight fit and it's on one of those small pci express slot, now the cards has to be siggle slot with out a big fan of heatsink i want to be able to play new games my specs are

Intel® Core™2 Quad Processor Q9300 (2.5GHz, 1066MHz FSB, 6MB L2 cache)
Genuine Microsoft® Windows Vista® Home Premium (64-bit) with SP11
4096MB 800MHz DDR2 Dual Channel Memory (2 x 2048MB Modules)9
ATI Radeon™ HD3450 Graphics with 256MB of Discrete Graphics Memory9
640GB 7200RPM SATA II hard drive5


also it would be nice if i didn't have to change my power its 300watt if i do it's not a prob but rather not, i know the 12V rail has 14amps

 

[Twoboxer]

The 4650 & 4670 are available in single slot, require no additional power connector, but specs call for a 400W minimum psu.

Once you replace the psu, other single slot options may be available, like this HIS 4850:

http://www.newegg.com/Product/ShowImage.aspx?CurImage=14-161-235-S02&ISList=14-161-235-S01%2c14-161-235-S02%2c14-161-235-S03%2c14-161-235-S04%2c14-161-235-S05%2c14-161-235-S06&S7ImageFlag=1&Item=N82E16814161235&Depa=0&WaterMark=1&Description=HIS%20Radeon%20HD%204850%20H485F512P%20Video%20Card%20-%20Retail

If you replace the psu, and can move that tuner card to another slot, other options are available.

What is the Gateway model number?

 

[evongugg]

According to my calculations you need a power supply with 18 amps on the 12v rails for that setup.
300W with 14 amps is too low.