I live in the UK and need a card that will run games like ArmA2 and BC2 well. I use 1024x768 resolution on a Mitsubishi LCD1511M monitor. But I also play alot of older games such as Battlefield 1942! I have a budget of around £80-£90 and my specifications can be found below. I live in Leeds so I usually buy from CCL-Online http://www.cclonline.com
it could possibly... but not much... and again, if you can get a 5770 for the same price as a 5670.. why not? also since your am2+ motherboard can also take a cpu upgrade too... than you could end up eventually with a great small-resolution-gaming-machine... (add something like an athlon 2 x3 later on -> cheap + great for gaming)
What of a Sapphire Radeon 5750HD 1GB? Would that bottleneck and could my PSU run it right? And is it better than my old 9800GT 512MB? The whole reason for this is because my 9800GT broke and I am looking for something a little better as I get a new card...
your 500w PSU can run all mentioned cards (+more). your dual-core @ 2.8GHz CPU is ok for gaming too.. especially for 1024 resolution. the 5750 1gb is more 'balanced' with your current setup... however - again the 5750 is inferior to the 5770... so when a good deal like that comes along - where you can get the better card for the same price... i'd go for the better one of course...
and i really don't see much of a bottle neck for either card... and even if there is a slight one... it'll be relative to each cards' performance
At 1024 x 768 it does not take much of a graphics card to get good frame rates.
If you do upgrade the graphics card, jump a couple of tiers in capability, otherwise you will be disappointed with the results.
To help assess your options, run these two tests:
1) Run your games, but reduce the resolution and eye candy to a minimum. This will simulate what will happen if you upgrade to a stronger graphics card. If your FPS improves, it indicates that your cpu is capable of driving a stronger graphics card to higher levels of FPS.
2) Keeping your graphics resolution and settings the same, reduce your cpu power. Do this by removing the overclock, or by using windows power management to set a maximum cpu% of perhaps 70%. If your FPS drops significantly, it indicates that your current cpu is a limiting factor, and that a faster cpu would help.