Hey guys, I'm going to be building a new computer for the first time and just wanted some feedback on the parts needed to build my computer

So here's a list of parts i thought would be good enough for a gaming computer. So here it is: (please tell me if i need anymore items to make my computer run)

-Intel Core 2 Duo E8400 3.0 GHz 6M L2 Cache 1333MHz FSB LGA775 Dual-Core Processor--$164.99
Newegg.com - Intel Core 2 Duo E8400 Wolfdale 3.0GHz 6MB L2 Cache LGA 775 65W Dual-Core Processor - Processors - Desktops

-EVGA 123-YW-E175-A1 nForce 750i SLI FTW 775 Mainboard--$120.95
Amazon.com: EVGA 123-YW-E175-A1 nForce 750i SLI FTW 775 Mainboard - Retail: Electronics

- Western Digital Caviar Blue 500 GB Bulk/OEM Hard Drive 3.5 Inch, 16 MB Cache, 7200 RPM SATA II WD5000AAKS--$62.98 (free shipping)
Amazon.com: Western Digital Caviar Blue 500 GB Bulk/OEM Hard Drive 3.5 Inch, 16 MB Cache, 7200 RPM SATA II WD5000AAKS: Electronics (i was going with 320gb first until i found this...almost same except it's 500gb and a few $$ more so i thought this is a better deal)

-XFX Geforce 9800 gtx+--$139.99
Amazon.com: XFX PVT98WYDFH GeForce 9800 GTX+ 512MB DDR3 PCI-E 2.0 Video Card: Electronics

-Crucial Ballistix 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory--$49.99
Newegg.com - Crucial Ballistix 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Desktop Memory

-Still need a case for the computer and i wasn't sure which one would be good enough to fit all this in so please give me recommendations

Total so far: $530.91

If there are any better deals any of you guys find please do tell
Also, i am on a tight budget and looking to build a decent gaming computer for about $800 or lower
And finally please correct any mistakes and sorry for any obvious mistakes as i am a beginner in building a computer.

(sorry if this is the wrong section on forums )

The motherboard and cpu are a great match from what I can determine. There have been no bad reports for either one and infact the overclocking capabilities are very good and you should be able to reach mark6 benchmarking of the mid 17,000's .
The graphics card is an excellent choice other than the size and you must take care with this....it is extremely long and in some cases will not fit without some modding by cutting some metal framework out and then it must be a good job or stand the option of grounding/arching across the card to frame.

I personally don't have a liking to large capacity drives as they just do not hold up as long as the smaller drives do. Major draw back. I would opt for a couple of twin 250's and set up a RAID array for the faster speeds and protection of your data because of the overclocking issues. If you must have a super large drive then use it for external back up purposes as it is not constantly running and wearing out.

The graphics card is a very cool running card and does not generate a lot of heat source but that CPU when overclocked will so you will need to look at a nice heat sink and fan other than a stock one or you will be having frame rate issues and have to slow the thing down to dissipate the heat.
I would also check out the thermal paste and choose the best around to help with the cooling....Do Not Use Thermal Tapeon this system or you will also have heat issues as thermal tape does not dissipate heat that well.

The memory is good but may be hard to regulate when overclocking....this is dependent on your operating system that you plan on installing. Windows XP (Home or Pro) will not recognize more than 3 gigs of memory and may cause issues with reading the 4 gigs. Not that much of an issue but it may not read properly and you may get false readings and cause you to over clock and burn something.

The power supply needed for this set up should not be less than 600 watts and needs to have the 24 pin connector for the board and the other 6 pin for the SLI graphics card. The 6 pin can be by an adapter.

For the case. Check the mobo dimensions and compare to the views of the case to make sure that you have room for the board to fit and clearance for the graphics card as well.
Buy you some extra right angle Sata cables to be on the safe side. I would also look into a sata optics drive for that extra data transfer speed as well.

Good luck!

Thanks for all this good advice and i still had a few questions. I only went with a bigger hard drive because I found a good deal on 500gb. At first i was going with a 320 gb for a few $$ cheaper. Also, i do not plan on overclocking this computer...maybe some other time but not right now, as i am not a hardcore gamer that needs all that extra power. Also, i think cooling this thing may be a problem at the moment... do i need to buy fans? water cooling? or will i get stock coolers with the motherboard and graphics card? Finally, is it possible for you to help me find a case that would fit that card? ty

Let me see what I can do....
What are you looking for in the case?
window?
power supply?
color?
front cover or open faced?
Front panel access to headphone jack, USB etc.?
Extra Fans for cooling?
Lots of things to think about!!!!

Hey i just found out my cousin knew how to build computers too lol and he just game me an awesome build so ty for all your help