Roughly:
- Mac Pro 4,1 $900-$1000 in good condition
- GTX680/7950 - $400 - $500
- 480gb SSD $320
- 3.3 hex core - $600
I just did this as well.
- Mac Pro 4,1 $700 (4x 2.66GHz /w 5770. Sold the 5770 for $150, so we'll call it $550 out of pocket) flashed to 5,1
- 24GB Corsair ECC Registered RAM, 1333MHz
- 3.46GHz Hex Core Xeon W3690 - $650
- Gelid GC Extreme Thermal Paste - $9
- GTX 680 2GB /w EFI Firmware - $470
- Syba SD-PEX40068 Marvell 88SE9230 6G SSD RAID Caddy (Native drivers)- $43
- ORICO PFU3-4P 4-port USB 3.0 Card (Native drivers) - $38.00
- Misc power cables for running power to USB 3.0 and Orico cards - $20
- Samsung 840 Pro 256GB x 2 - $480
- 2xWD Red 2TB - $250
Total: $2660 (No OS)
For comparison, a comparable Alienware Aurora:
i7 3820 3.6GHz @ 4.1GHz Quad Core
USB 3.0/SATA III Integrated
GeForce GTX 670 2GB
16GB 1600MHz RAM
512GB "SSD" with 1TB 7200 RPM drive
Integrated Audio
$2499 (Includes Win7)
All of my components, save the RAM and CPU are new. I could've spent a little more for a comparable gaming PC from a known vendor. If I was going cheap, for a comparable system, I'd have done this:
Intel X58 System board /w SATA 3.0/USB 3.0 - $189
- i7-990x 3.46GHz (Off eBay) /w Intel HSF - $640
- Gelid GC Extreme Thermal Paste - $9
- Corsair XMS 24GB 1333MHz Non-ECC - $90
- Galaxy GeForce GTX 680 - $478
- Corsair Graphite 600T Case - $120
- Corsair HX Professional Series 850-watt - $170
- Samsung 840 Pro 256GB x 2 - $480
- 2xWD Red 2TB - $250
Total: $2426 (No OS)
My Mac Pro Premium comes out to a total of $234. And I'm sure the Mac Pro is a bit quieter.
Overall, happy with my build as both a work and a gaming system, dual booting.