My PC specs.
Motherboard : gigabyte GA-M68MT-S2
2 PCIE slots : 1 PCIEx16 & 2 PCIEx1
Processor : AMD Phenom ii x6 1045T
Hard drive : 1TB HDD
Ram : 4gb
PSU : 200W
I am going to buy 2 asus rog strix gtx 1080 ti OC will it work on my built ?
Do I need to modify or completely upgrade to a new system ?
Yes, it would work but you get PSUs 80+ gold/platinum, 1080'tis has TDP 250W. I suggest you buying PSU have 1000W or 1200W and RAM 4GB is enough