Upgrading Old Desktop

[light94]

I'm looking to upgrade my old desktop that I haven't used in a long time.

These are the components that I have:
COOLER MASTER Elite 330 RC-330-KKN1-GP Black SECC ATX Mid Tower Computer Case
Newegg.com - COOLER MASTER Elite 330 RC-330-KKN1-GP Black SECC ATX Mid Tower Computer Case

GIGABYTE GA-M61P-S3 AM2 NVIDIA GeForce 6100 / nForce 430 ATX AMD Motherboard
Newegg.com - GIGABYTE GA-M61P-S3 AM2 NVIDIA GeForce 6100 / nForce 430 ATX AMD Motherboard

EVGA 256-P2-N615-TX GeForce 7600GT 256MB 128-bit GDDR3 PCI Express x16 SLI Support Video Card
Newegg.com - EVGA 256-P2-N615-TX GeForce 7600GT 256MB 128-bit GDDR3 PCI Express x16 SLI Support Video Card

FSP Group SAGA+ 400R 400W ATX12V Power Supply
Newegg.com - FSP Group SAGA+ 400R 400W ATX12V Power Supply

AMD Athlon 64 X2 3600+ Brisbane 1.9GHz Socket AM2 65W Dual-Core Processor ADO3600DDBOX
Newegg.com - AMD Athlon 64 X2 3600+ Brisbane 1.9GHz Socket AM2 65W Dual-Core Processor ADO3600DDBOX

G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-2GBNQ
Newegg.com - G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-2GBNQ

Seagate Barracuda 7200.10 ST3320620AS 320GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording Technology) ...
Newegg.com - Seagate Barracuda 7200.10 ST3320620AS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording Technology) -Bare Drive

Sony Optiarc 18X DVD±R DVD Burner Black SATA Model AWG170S-B2 - OEM
Newegg.com - Sony Optiarc 18X DVD±R DVD Burner 18X DVD+R 8X DVD+RW 8X DVD+R DL 18X DVD-R 6X DVD-RW 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM Black SATA Model AWG170S-B2 - CD / DVD Burners


What components am I able to still use? I was thinking:

1) Keep: case, HDD drive, dvd drive
2) Replace: mobo, gpu, cpu, and ram
3) Not sure if I can still use the PSU?

I want to keep whatever is still compatible with newer parts and upgrade the PC with better budget parts. This PC will only be used to play Diablo 3 and Heroes of Newerth at high settings.

Recommendations for budget, new parts will be appreciated as well.

Thanks!

[SpicySnow]

1. Yep, all good.

2. O.o yea that's like the gut of the computer, your pretty much replacing the ENTIRE computer.

3. 3 reasons: You want to have about 500W-600W
500W psu are very cheap, $35 to $45 from a good brand if you wait for good deals,
PSU is extremely important, a psu failure can kill your motherboard, gpu, hdd, along with the psu. Very expensive. + Your psu is a nobrand.


Recommendations:

i5 processor - i3-2120 if extreme budget
z77 mobo
2x4Gb 1600mhz ddr3 RAM
7870 or 660 Ti (Both of these are a little overkill, but the 660 and 650 ti have yet to be released.)
Including the psu, this will cost you under $700.

If you wait for new mid-range video cards and go for the i3 instead, it will cost you about $500. With $500, HoN will max out. D3 I think you will have a little trouble - you'll have to make due with medium-high. In some cases very high graphics. (This is speculative since the actual performance of the 660 hasn't been released yet)
[Edit] Was talking about 660 not 660 Ti. Seems like the 660 Ti is a bit more expensive than I had expected.

[CrAzYsIm]

The 660Ti has been relased and there are benchmarks out. Its a great $300 performer.
GeForce GTX 660 Ti Review: Nvidia's Trickle-Down Keplernomics : The Kepler Trickle-Down Continues
AnandTech - The GeForce GTX 660 Ti Review, Feat. EVGA, Zotac, and Gigabyte

[light94]

Thanks for the replies. I forgot to mention that I'm trying to shoot for ~$300 for the parts I need. It's fine if the games run on low med-high as long as they don't lag or skip. Don't need a monitor, OS, or keyboard/mouse.

[SpicySnow]

$295-ish. I didn't do any price shopping, you should check around with various vendors to find better prices.
But this is probably your best bet if you want to keep under $300.

Also, I just pulled a random AM3+ mobo, you might want to look around for a better one.

$60 AM3+ Mobo
Amazon.com: ASUS Socket AM3+ - Hybrid Crossfire Integrated Graphics Support AMD 760G DDR3 1600 Micro ATX Motherboards M5A78L-M LX: Electronics

$100 AMD Phenom II X4 965
Amazon.com: AMD Phenom II X4 965 AM3 3.4Ghz 512KB 45NM 125W 4000MHZ: Electronics

$20 4Gb RAM - can add one in the future if needed.
Amazon.com: Kingston Technology HyperX Blu 4GB 1333MHz DDR3 Non-ECC CL9 DIMM KHX1333C9D3B1/4G: Electronics

$115 HD 7770
Amazon.com: Sapphire 11201-00-20G Radeon HD 7770 GHZ 1GB DDR5 HDMI / DVI-I / Dual Mini DP PCI-Express Graphics Card: Electronics