Mariusz_3,
What country are you in?
Are you agreeable to used parts- especially the CPU?
For your uses, you need both a very good single-thread performance and for rendering as many cores as possible and a lot of RAM,, and a fast disk- an expensive combination.
Here is my thought:
1. HP Z620 Workstation / Computer Case Chassis with Front Panel 800W PSU 644311-005 Brand New Case / 800W Power Supply PSU / Fans > $219
http://www.ebay.com/itm/301846355856?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
2. HP Z620 Workstation System Board Motherboard Socket 2011 708614-001 > $157 or offer
3. HP 647287-001 Z420 Z620 Workstation 5-Pin CPU Fan w/Heatsink > $18
http://www.ebay.com/itm/HP-647287-001-Z420-Z620-Workstation-5-Pin-CPU-Fan-w-Heatsink-/201826545253?hash=item2efdccae65:g:aCoAAOSw~AVYqwxh
4. Intel Xeon E5-2673 v2 8-Core 3.3 / 4.0GHz 25MB 110W SR1UR Ivy Bridge-EP LGA2011 CPU > sold for $500 (20 Feb 17)
http://www.ebay.com/itm/Intel-Xeon-E5-2673-v2-8-Core-3-3GHz-25MB-110W-SR1UR-Ivy-Bridge-EP-LGA2011-CPU-/192109720945?hash=item2cbaa1b571%3Ag%3AQwEAAOSwtfhYqyCB&nma=true&si=z7qEmo%252FpE0g16jQH4f7%252BWr2HY28%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
5. Samsung 32GB 1Rx4 4x8GB PC3-14900R DDR3-1866Mhz ECC REG Registered Server Memory > $125
6. MSI GeForce GTX 1060 DirectX 12 GTX 1060 GAMING X 6G 6GB 192-Bit GDDR5 HDCP Ready ATX Video Card > $275
https://www.newegg.com/Product/Product.aspx?Item=N82E16814127963&cm_re=gtx_1060_6gb-_-14-127-963-_-Product
7. Samsung 850 EVO 500GB,Internal,2.5" (MZ-75E500B/AM) SSD > $125
http://www.ebay.com/itm/Samsung-850-EVO-500GB-Internal-2-5-MZ-75E500B-AM-SSD-/282367650322?hash=item41be6c6a12:g:g~AAAOSwnHZYikv6
8. WD Black 1TB Performance Desktop Hard Disk Drive - 7200 RPM SATA 6Gb/s 64MB Cache 3.5 Inch - WD1003FZEX > $75
https://www.newegg.com/Product/Product.aspx?Item=9SIA6AH20X8244&cm_re=wd_black-_-22-236-625-_-Product
9. Asus Black SATA 24X DVDRW E-Green No Logo Model DRW-24F1ST/BLK/B/GEN - OEM > $20
9. Windows 10 Pro 64-bit - OEM > $150
https://www.newegg.com/Product/Product.aspx?Item=N82E16832588491&cm_re=windows_10_pro-_-32-588-491-_-Product
TOTAL= $1,589
Thereby, with a new case / chassis, GPU, and disks but used motherboard, CPU, RAM, every subsystem is high performance. and it's very expandable as an E5- v2 can be 12-core and the z620 can use two of them.
The E5-2673 v2 is a fantastic performance- 8-cores @ 3.3/4.0GHz and has a Passmark CPU Mark of 16320 and the single thread Mark is in the top tier for 8-core Xeons- 2009 - but it's also rather rare. It may be necessary to start with something like a E5-1660 v2 6-core @ 3.7/4.0 > (
13735 /
2077) for about $500 and wait for a good price on an E5-1680 v2- about $1,100 now) or better, an E5-2667 V2 (8-core @ 3.3/4.0GHz)- these are running at about $800 these days. If you buy an E5-2667 V2, a second one can be added later for 16 cores /32 threads. I have a z620 16 cores /32 thread (2.9/3.8GHz) rendering system and it will run a CPU Sketchup/Vray 3180 X 2160 rendering of a 160MB model (single lighting source) in under 11 minutes.
I'm an advocate for Quadros for this kind of work- viewport support, higher anti-aliasing and you may wish to have a look at Autodesk certified hardware as they will not or reluctantly support problems if the GPU is not certified.
Cheers,
BambiBoom
CAD / 3D Modeling / Graphic Design:
HP z420 (2015) (Rev 3) > Xeon E5-1660 v2 (6-core @ 3.7 / 4.0GHz) / 32GB DDR3 -1866 ECC RAM / Quadro K4200 (4GB) / Samsung SM951 M.2 256GB AHCI + Intel 730 480GB (9SSDSC2BP480G4R5) + Western Digital Black WD1003FZEX 1TB> M-Audio 192 sound card + Logitech z2300 2.1 speakers > 600W PSU> > Windows 7 Professional 64-bit >> 2X Dell Ultrasharp U2715H (2560 X 1440)
[ Passmark Rating = 5581 > CPU= 14046 / 2D= 838 / 3D= 4694 / Mem= 2777 / Disk= 11559] [6.12.16]
Analysis / Simulation / Rendering:
HP z620 (2012) (Rev 3) 2X Xeon E5-2690 (8-core @ 2.9 / 3.8GHz) / 64GB DDR3-1600 ECC reg) / Quadro K2200 (4GB) + Tesla M2090 (6GB) / HP Z Turbo Drive (256GB) + Samsung 850 Evo 250GB + Seagate Constellation ES.3 (1TB) / Creative Sound Blaster X-Fi Titanium PCIe sound card + Logitech z313 2.1 speakers / 800W / Windows 7 Professional 64-bit > > HP 2711x (27" 1980 X 1080)
[ Passmark System Rating= 5675 / CPU= 22625 / 2D= 815 / 3D = 3580 / Mem = 2522 / Disk = 12640 ] 9.25.16
[ Cinebench R15: OpenGL= 119.23 fps / CPU = 2209 cb / Single core 130 cb / MP Ratio 16.84x] 10.31.16
Autodesk Building Suite, Sketchup/Vray, Solidworks, Adobe CS6, Wolfram Mathematica