Check out my budget workstation/gaming build! Let me know if im crazy!

Solution
What kind of CAD work and which program will you be using? These days, a lot of programs are moving to DirectX meaning gaming GPUs can offer good performance. This means you just need one GPU.

Assuming you can do that, I would look at a better CPU, that will be the main workhorse for CAD. Something like this could work well:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Xeon E3-1220 V3 3.1GHz Quad-Core Processor ($202.98 @ SuperBiiz)
Motherboard: Gigabyte GA-H87-D3H ATX LGA1150 Motherboard ($99.99 @ Amazon)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($72.99 @ Amazon)
Storage: Samsung 840 EVO 120GB 2.5"...

mtbmofo

Honorable
Jan 17, 2014
3
0
10,510
here is the full list of parts:

AMD-6300 3.5Ghz 6-core processor
Asus M5A99FX Pro R2.0 ATX AM3+ Mobo
G. SKill Ripjaws X series 8Gb (2x4Gb) DDR3-2133
Kingston SSDNow V300 series 120 GB
CoolerMaster RC-912-KKN4 ATX Mid Tower
Apevia 650w ATX Power Supply
ATI FirePro V3900 1GB video card
XFX Radeon HD 7870 2Gb video card

The gaming GPU i havent set in stone yet, my budget for that is roughly ~$150-$180

Price for Kit so far: $797.89
 

Transmaniacon

Distinguished
What kind of CAD work and which program will you be using? These days, a lot of programs are moving to DirectX meaning gaming GPUs can offer good performance. This means you just need one GPU.

Assuming you can do that, I would look at a better CPU, that will be the main workhorse for CAD. Something like this could work well:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Xeon E3-1220 V3 3.1GHz Quad-Core Processor ($202.98 @ SuperBiiz)
Motherboard: Gigabyte GA-H87-D3H ATX LGA1150 Motherboard ($99.99 @ Amazon)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($72.99 @ Amazon)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Disk ($88.99 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: EVGA GeForce GTX 660 2GB Video Card ($159.99 @ Newegg)
Case: NZXT Source 210 Elite (Black) ATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($59.99 @ NCIX US)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($14.99 @ Newegg)
Total: $799.89
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-17 12:44 EST-0500)
 
Solution

mtbmofo

Honorable
Jan 17, 2014
3
0
10,510


Thanks For the reply Transmaniacon,
Primarily using Solidworks for most of my stuff, as well as CAM software. I want to stick with a Solidworks certified gpu for my work stuffs because i have had frustrations with gaming card "workarounds". But i hear they are dismal on gaming. So thats why i need a dual PCIEx16. Nice find on the gtx 660!.

forgive my ignorance but im not sure how a 3.1ghz quad would be faster then a 3.5ghz 6-core. maybe i dont know what im talking about haha, this will be my first pcbuild.