Appreciate that there are several versions of this question (might be better placed in another section)but just looking for some quick feedback. Thinking of upgrading my Dell XPS 420 (bought back 01/2008).
XPS 420 PREMIUM Q6600 QUAD CORE 2.4Ghz
3GB DUAL CHANNEL DDR2 667MHZ
SINGLE 768MB NVIDIA GEFORCE 8800 GTX
425 WATT PSU (Assumed on some research)
WINDOWS VISTA HOME PREMIUM 32bit
Thoughts are to upgrade to 4-6GB RAM (should I replace all the RAM?), Sapphire RADEON HD 5850 (price point £216 and DirX11 seem to indicate a solid upgrade), and Windows 7 64bit (to maximise on the RAM).
Research I have done suggests that HD5850 is actually less power hungry than the 8800GTX (Maximum board power: 151 Watts vs 155 Watts)but is this the reality? Sorry I don't know what motherboard it has but is it likely I will have problems with that?
Any other thoughts on a doing the upgrade in a better way or indeed would it better to hold off and buy something in 12-18 months?