The viewport and modeling functions of AutoCAD and revit, like pretty much all CAD and 3D modeling software, are very lightly threaded. A 6 core CPU is actually a waste for modeling and design. The i7-4790K costs less and would perform better, and the E3-1231V3 costs less and performs about the same while bringing ECC memory support to the table.
Whether or not SHaggy would benefit from a many-core CPU depends on what output render settings he/she wants to use in vray. Vray supports CUDA accelerated rendering, and when using it, the CPU is not a major factor in export performance.
Quadro K2200 GPU for accurate floating point precision and 3D rendering.
Revit, AutoCad, and 3DSMax use DirectX viewports. They do not take advantage of any of the advanced openGL driver optimizations or compute precision that you get with a workstation GPU. The K2200 is a complete waste for these programs, especially for someone using a GPU accelerated export renderer. A similarly priced GTX970 will be substantially faster for all operations from viewport to export rendering in the software that SHaggy has listed.
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Brillis Wuce :
If you're going to overclock your CPU, then water cooling would be a good idea. If not, its complete overkill.
liquid heatpipes are superior to pumped liquid cooling for almost all practical applications, even overclocking withing practical ranges. A Pumped liquid cooler does not begin to out-perform a liquid heatpipe cooler until the effective size of the radiator is larger than could ever be strapped to a CPU socket. For the most part, all AIOCLC's are overpriced gimicks with a laundry list of down-sides (more noise, vibration, more failure modes, surface to surface seals that can leak, no passive cooling capacity etc).
As far as your video card, here's a quick breakdown...
Quadro cards are meant for 3D rendering and CAD programs.
The primary advantage of a quadro card in CAD, is the advanced openGL support and optimizations. Hardware wise, the K2200 is a GTX750Ti, nothing more nothing less. Flagship quadros often have ECC VRAM and higher double precision math performance than their GeForce brethren, these features do not bring anything useful to openGL CAD view-ports, and the K2200 does not have these features enabled anyway.
GeForce cards, are in fact, the industry standard used for export rendering with gpu accelerated renderers like vray, iray, furyball, and octane. In some cost-no-object implementations, Titans and K6000's are used in place of GeForce for the large VRAM buffers, but at this budget there's no reason to entertain that sort of specialized use scenario.
This is because they have higher floating point precision, which results in more accurate representation onscreen.
The K2200 does not have any advantage in FP precision or throughput over a GTX750Ti. Some Quadro cards do, this one doesn't. The only advantage to the K2200 would be for the openGL optimization and support in software like Maya an SolidWorks, none of which has been mentioned by Shaggy. It might be a good idea to use a workstation GPU for this build, but not to improve performance or support in any of the software listed, rather, to better support a more diverse selection of CAD software should he want to use something different in the future.
When you compare that to something like the GTX 970, there's a big difference. The 970 is meant to produce high frame rates in gaming, so it dumbs down the floating point calculations. This is why the Quadro cards can go upwards of $5000.
Quadro - CAD/3D
GTX - Gaming
That's a gross generalization and misrepresentation between gaming and workstation GPU's.
Workstation GPU's should be used in applications that leverage the driver for openGL or other compute optimizations, VRAM buffer size, ECC memory (where applicable on specific GPU's, not the K2200), or double precision math performance (where applicable, on specific GPU's, not the K2200).
As far as your optical drive, yes they are obsolete, and your case doesn't support it, but externals are very cheap and will work fine.
If he needs an optical drive a case that supports it should be selected. Cluttering up someones desk with an afterthought is a bad approach.
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Shaggyhardware,
I would like to make a build recommendation, but I need to know what features of Vray you would prefer to use. The CPU renderer is more full featured, while the GPU renderer is substantially faster.
Read here:
http://docs.chaosgroup.com/display/VRAY3/GPU+Rendering
Note that most of the GPU's they have tested and recommend are GeForce cards.
Check here to see if the GPU renderer is going to be adequate for your needs:
http://docs.chaosgroup.com/display/VRAY3/V-Ray+RT+Supported+Features
It would also be good to know if this build is intended specifically for AutoCAD/Revit/3DSMAX or if you intend to use any other CAD software with it at any point along the way.
Without more detailed information about the use of the software, advising on hardware to maximize performance for your budget is going to be difficult. The build previously proposed in this thread could wind up being a good approach, or could wind up being a total waste.
Professional CAD machines built for maximum modeling/design (viewport) performance come with i7-4790K's, while professional CAD machines built for maximum reliability and stability are built with E3-1200 V3 and E5-1600 V3 series CPUs with ECC memory on C226 and C612 chipset workstation motherboards. More than 4 cores are only ever selected if the machine is ALSO going to be used for major CPU based export rendering. If you can find a GPU based export renderer to suit your needs you'll get a lot more render performance for your dollar that way. I believe octane render will actually work right in revit and autocad without having to export over to 3DSMAX to support vray.
A quad core machine with dual GTX970's could probably be made to fit your budget comfortably, and would be 5X faster than the K2200 in export render performance when used with CUDA based renderers.
Generally speaking: (within the scope of building 3D modeling and CAD computers)
FirePro offers the best value for performance in advanced openGL viewports.
Radeon offers the best value for performance in basic openGL viewports.
GeForce offers the best value in DIrectX viewports and export rendering.
Quadro offers the greatest versatility in terms of API support, but does not usually represent the best value for any one specific purpose.
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