> Tai kad tam Dell Toweryje 120 Gb hardas tik ir 4 Gb RAMo - tuoj upgreido reikalaus.

Tas 120GB bent SSD.. na ok, pakoreguokime:
http://www.rde.lt/products/lt/148/66113/sort/1/filter/0_0_0_0/OptiPlex-790-Tower-i5-2400-8GB-500GB-DVD-W7Pro-atnaujintas-stacionarus-kompiuteris.html

370 Eur - Tower (kad sukistum normalia GPU) i5-2400 8GB 500GB DVD W7Pro
  58 Eur - normalesnis PSU tarkim
http://www.rde.lt/products/lt/415/47111/sort/1/filter/0_0_399.400_40120/HYPER-M-500-500W-Modular-maitinimo-blokas.html
Kompas 428 Eur

+GTX1060:
220 Eur - http://www.skytech.lt/gtx-1060-3gt-msi-geforce-gtx-1060-3gb-gddr5-192-bit-hdmi-dvi-p-322742.html
260 Eur - http://www.rde.lt/products/lt/417/67534/sort/1/filter/130.440_0_0_0/GTX-1060-GAMING-X-3G-vaizdo-plok%C5%A1t%C4%97.html

Beveik telpa i tuos 600 Eur