Need to know if these two are compatible with my computer

[CRC12]

THIS GRAPHICS CARD:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814143178

ALSO WITH THIS PSU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139005


What I'm asking is, are they both compatible with my computer? Once again, here are my specs

Machine name: DELL
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.090206-1234)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Dell DXC051
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A05
Processor: Intel(R) Pentium(R) D CPU 3.00GHz (2 CPUs)
Memory: 1014MB RAM
Page File: 1171MB used, 1267MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.5512 32bit Unicode
File System: NTFS
Total Memory: 228 GB
Free Space: 68.5 GB
I know my computer is PCI-E 1.0

Here are my motherboard details:
http://i211.photobucket.com/albums/bb194/Starlight_Kinght/CPUZ.jpg


Thanks!

My actual model is a Dell XPS 200 and what I'm really concerned with is if they will both fit in my XPS at the same time. If you look up pics of the XPS 200 its pretty small.

 

[AKM880]

Yes that PSU will be enough for a GTS250, but will your CPU bottleneck it?

 

[theAnimal]

Get an HD4770 instead, same performance but only uses 4-5A.

 

[ill b ben]

+1 on the 4670 seeing as its alrdy rather crouded and im pretty sure a 450 watt corsair would do aswel, even with a P4 D

and with the money u spare u could bump your memory to 2 gig
and even have some left, Cheers