i have an ati 4850 right now. came in my dell xps...and i know...well, not very much about pc hardware.

i was looking at newer cards and they seem to range between like 50 bucks and like a grand. really a 1000$$ firestream? wtf is that?


anyways, what can my computer 'handle' and actually use all of the cards potential? and i'd like to spend less than 300 if possible~~~ my computer buddies would be installing the card...so dont include installation.

System Information
------------------
Time of this report: 2/19/2010, 13:47:51
Machine name: OWNER-PC
Operating System: Windows Vista™ Home Premium (6.0, Build 6002) Service Pack 2 (6002.vistasp2_gdr.091208-0542)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Studio XPS 435MT
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (8 CPUs), ~2.7GHz
Memory: 4086MB RAM
Page File: 1764MB used, 6615MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
DxDiag Version: 7.00.6002.18107 64bit Unicod


Display Devices
---------------
Card name: ATI Radeon HD 4800 Series
Manufacturer: ATI Technologies Inc.
Chip type: ATI display adapter (0x9442)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_9442&SUBSYS_05021028&REV_00
Display Memory: 2292 MB
Dedicated Memory: 505 MB
Shared Memory: 1787 MB
Current Mode: 1600 x 900 (32 bit) (60Hz)
Monitor: Generic PnP Monitor
Driver Name: atiu9p64 aticfx64 aticfx64 atiu9pag aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
Driver Version: ()
DDI Version: 10.1
BGRA Supported: Yes
Driver Attributes: Final Retail
Driver Date/Size: , 0 bytes
WHQL Logo'd: n/a
WHQL Date Stamp: n/a
Device Identifier: {D7B71EE2-D702-11CF-5764-0325A1C2C535}
Vendor ID: 0x1002
Device ID: 0x9442
SubSys ID: 0x05021028
Revision ID: 0x0000
Revision ID: 0x0000
Video Accel: ModeMPEG2_A ModeMPEG2_C



any info would be great, thanks : )


p.s. for w/e reason my graphics card runs around 91*C under load...yikes?