Will my Mac support windows 10?

I have reserved a copy of the free windows 10 offer. But I just remembered that my bootcamp goes up to only Windows 7. I know it says that my mac model won't work and stuff but over the years I upgraded my mac and replaced some things (Hard drive stopped working :/). I upgraded RAM, my Graphics Card, Hard Drive, etc. So i'm wondering if that stuff will still apply to my mac. Here are the specs of my mac if it helps (my cpu is decent and my graphics could have been better but I can play games like Black Ops 2 max settings and stuff but shadows suck).

Specs:

CPU: Intel Core i3 540 3.06 Ghz (There is 4 cores but I've read that 2 cores for each thread so technically 2 cores. Something about hyperthreading tech)

12 GB RAM

ATI Radeon HD 4670 256 MB (now you see why shadows suck)

Apple HDD HUA722010CLA330 ATA Device (probably not needed)