Here are the hardware specs from my new SimRacing computer that I built in April of this year. With this hardware you can run
any Car Sim with everything on high or ultra, with real weather, at night; and as many cars as you like, and you'll still have well over 80fps at all times. I'm running a 34" 21:9 LG monitor with 2560x1080 60Hz, and the picture looks like glass
No stuttering,
no tearing
The Gigabyte mainboard and the Kingston RAM are
made for overclocking, so, immediatly after I'd installed Win 10 onto the new system, I o/c'ed it, using the pre-sets in the BIOS, from 3.5GHz to 4.4GHz. The sims fly, and it doesn't even run any hotter than the standard clock!
Make sure you don't skimp on the CPU cooling fan, or the PSU. There are cheaper alternatives to the parts I used, but if you're going to be overclocking, and driving in the sim for hours on hot days, top hardware with reserve margins is a good investment. I know someone who was too cheap to buy a good PSU: The cheapo china crap PSU failed after 6 months, and took his €400 GTX 970 down with it when it failed.....in the end he payed
€350 more......
A similar system to mine should fall within your budget, have fun with the new rig
Gigabyte Z170X-Gaming 5 mobo
6600K i5 Skylake @ 4.4GHz CPU
CPU Cooler: Noctua NH-U12S
MSI GTX 970 GPU ( standard clock )
Kingston HyperX 16gb 2 x 8gb DDR4-2666 RAM
Creative Soundblaster Z Soundcard
Corsair RM650X 650W PSU
2 x Samsung 850 evo SSD's
Noctua cooling fans