Flight sims (or at least the MS products) were originally CPU intensive because graphics cards in FS4 days were not that powerful. Despite the evolution of the sim and the increasing need for a good graphics card it is still true that the CPU does a lot of work so I suspect your Intel Core 2 is throttling the system. Dell, Compaq and HP machines used to require proprietary hardware which made upgrading difficult and if this is still so your solution is correct. Get a new case and bang in a new mobo/CPU/memory bundle. Add your PSU and GTX560 plus your hard drives and DVD player plus any other bits and pieces. When you start the new machine Windows should run but it will probably come up with a warning that new hardware has been detected and Windows will need registering again. Depending on whether you had an OEM or full version this may be OK or possibly MS may say no. I’ve had mixed results over the years with them allowing some through but a couple of OEM upgrades were rejected. bones bones@xxxxxxx http://woodair.net From: jhb-bounce@xxxxxxxxxxxxx [mailto:jhb-bounce@xxxxxxxxxxxxx] On Behalf Of adamreed@xxxxxxxxxx Sent: 02 August 2011 15:35 To: jhb@xxxxxxxxxxxxx Subject: [jhb] Computer upgrade advice please?? Hey Guys Was speaking to Fred about this the other day as he has upgraded his pc, anyway heres my story; Right, I have a packard Bell intel core 2 quad Q8300 on a EG43M Motherboard. Now I know I am VERY restricted to what I can upgrade on this as its prebuilt (dont shoot me had it about 2 years I know I am silly), However I brought a GTX 560ti from Scan and a 650w PSU a few weeks back. I use Microsoft’s flight simulator, and have been told I am bottlenecking quite badly with this as i am still getting poor FPS in flight simulators. I've been advised that flight Sims run mostly off CPU not GPU, so how can i go about upgrading this? Would I be right in saying I could buy a case and then a CPU & Motherboard and id be able to do this?? by the way, ive looked on Scan and found a prebuilt over clocked bundle, Smart - Intel Core i5 2500K - Over clocked to 4.5Ghz - Updated August. Does this sound viable or am I way off?? Also wasn’t looking to spend any more than around £350 if that’s possible?? Thanks a lot, Adam.