It's actually not customized by me but if I remember correctly, my refurbished HP Pavilion P7-1240 has 1 TB hard drive, Intel i3 with 3.4 GHz processor, 10 GB memory, and I believe an AMD Radeon HD 7660D Graphics Card running on Windows 7.
Still nice in my opinion since I don't really have a lot of graphics-heavy PC games like the Far Cry Series and my games still play really well on high settings. Bought the system a couple of years ago and have not regretted the purchase considering all the games and experiments I've done on this awesome machine.
It'll probably be awhile since you'll hear me asking for any advice but thank you for accepting to help when the time comes.