7770 or 7750 ?

[Pat22]

I currently own a 4 year old acer aspire am5201 - e5621a that has an onboard radeon 3450 256mb, which is really bad and I'm tired of not being able to play some of my favourite games on anything thean the lowest settings (still only around 30fps)

I would like to upgrade my video card to either a 7750, or the mush more powerful 7770.

the only problem is that my PC only has a 300W PSU, but i know that the 7750 doesnt need a PSU connection at all, while the 7770 needs only 1. My question is will my 300W old PSu have the coreect connector for the 7770 and which of these 2 cards would be best for me

I want to play tiberium wars 3 , red alert 3, aoe 3 on max settings and maybe even some skyrim on medium i hope at least.

my complete system specs are as follows:

Summary

Product Name
Aspire M5201
Operating System
Microsoft® Windows Vista™ Home Premium , Service Pack 1
Chipset
ATI RS780+SB700
Processor
AMD Phenom(tm) 9650 Quad-Core Processor 2.3 Ghz
System Memory
4096 MB
Hard Drive
WDC WD6400AAKS-22A7B0 ATA Device, 596.17 GB
Generic- Compact Flash USB Device, 0 Bytes
Generic- MS/MS-Pro USB Device, 0 Bytes
Generic- SD/MMC USB Device, 0 Bytes
Generic- SM/xD-Picture USB Device, 0 Bytes
CD/DVD Drive
PIONEER BD-ROM BDC-202 ATA Device
Video
ATI Radeon HD 3200 Graphics
ATI Radeon HD 3400 Series
Total Available Graphics Memory
2175 MB
Audio
AMD High Definition Audio Device
AMD High Definition Audio Device
Realtek High Definition Audio
Network
Marvell Yukon 88E8071 PCI-E Gigabit Ethernet Controller
D-Link WUA-2340 USB Adapter
UUID
00226803EF0720081018074903000000
Serial Number
PTSAZ0X02584106A922702
BIOS Version
R01-B2
BIOS Release Date
08/15/2008

 

[dudewitbow]

7750 will be the safe choice. avoid using 6 pin required gpus on an oem psu

 

[Pat22]

which one of these would you reccomend?

http://www.newegg.ca/Product/Productcompare.aspx?Submit=ENE&N=100006663&IsNodeId=1&Description=7750&bop=And&CompareItemList=-1%7C14-102-969%5E14-102-969-TS%2C14-121-633%5E14-121-633-TS%2C14-102-985%5E14-102-985-TS%2C14-161-403%5E14-161-403-TS

 

[dudewitbow]

if you arent planning to upgrade in a long time or overclock, get the more expensive sapphire one because its the fastest of the 4

edit: though the 900mhz 7750 from xfx is the same price.