Here's a quick Upgrade just over 300... I didn't even shop around..
MSI "K8T NEO-FSR" K8T800 Chipset Motherboard for AMD Socket 754 CPU -RETAIL
Specifications:
Supported CPU: AMD Athlon64 Processors
Chipset: VIA K8T800 + VT8237
RAM: 3x DIMM for DDR400/333/266 Max 2GB
IDE: 2x UltraDMA 133 up to 4 Devices
Slots: 1x AGP 8X/4X, 5x PCI 2.2(32-bit,3.3V/5V)
Ports: 2xPS2,1xLPT,1xCOM,1xLAN,8xUSB2.0(Rear 4),SPDIF Out,Audio Ports
Onboard Audio: Realtek ALC655 6-Channel Codec
Onboard LAN: Realtek 8110S GbE
Onboard SATA/RAID: VT8237, 2x Serial ATA, RAID 0/1
Form Factor: ATX more info-> N82E16813130449 $70.00 $70.00
AMD Athlon 64 3000+, 512KB L2 Cache 64-bit Processor - Retail
Specifications:
Model: AMD Athlon 64 3000+
Core: Newcastle
Operating Frequency: 2GHz
FSB: Integrated into Chip
Cache: L1/64K+64K; L2/512K
Voltage: 1.5V
Process: 0.13 Micron
Socket: Socket 754
Multimedia Instruction: MMX, SSE, SSE2, 3DNOW!, 3DNOW!+
Packaging: Retail Box (Heatsink and Fan included) more info-> N82E16819103486 $146.00 $146.00
Mushkin Dual Pack 184-Pin 1GB(512MBx2) DDR PC-3200 - Retail
Specifications:
Manufacturer: Mushkin
Speed: DDR400(PC3200)
Type: 184-Pin DDR SDRAM
Error Checking: Non-ECC
Registered/Unbuffered: Unbuffered
Cas Latency: 2.5-3-3
Support Voltage: 2.5V-2.6V
Bandwidth: 3.2GB/s
Organization: two 64M x 64 -Bit
Warranty: Lifetime more info-> N82E16820146299 $136.25 $136.25
Subtotal » $352.25