Hey thanks for the response guys
After doing a heap of googling I ended up going with a gtx1650 low profile which has the best compromise of performance vs power draw - came across a couple of dudes on a forum that had done this with no probs - seems the hp elites are popular for converting to budget gaming machines
Temp shouldn't be a prob games room is in basement on south side of house so even on hottest days doesnt go above 25
Will replace the hdd with a 500gb ssd but will first add some ram - i think 16gb on top of the 8 in there at the mo should be fine out of possible 32gb
G29 Wheel and pedals have turned up, new 35" 21:9 ultra widescreen uhd led should turn up tomorrow/friday so just need to research and sort cockpit but an old desk and recliner will do for a few weeks, probably end up with something from next level or playseat
Running some cat6 for it tomorrow so it doesn't have to fight on the wifi - dont actually think it has wifi anyway but
Fingers crossed all works together ok