I run the game on ultra 1360x768
Windows 8 64-bit
Vishera 32nm Technology
8.00GB Dual-Channel DDR3
Gigabyte Technology Co., Ltd. GA-78LMT-USB3 (Socket M2)
2048MB NVIDIA GeForce GTX 770 (MSI)
466GB Hitachi HDS721050DLE630 (SATA)
TSSTcorp CDDVDW SH-224BB ATA Device
High Definition Audio Device
What speeds are your RAM sticks running at? And, at 720p, 150fps is what you should be getting, I've read many threads and heard of many angry customers that are displeased with the performance of the 770, this seems to be a major isssue and will most certainly be addressed by nVidia. You have decent specs, there's no reason your GPU should be that slow. Wait, what power supply do you have?
Overclock your RAM to 1333 or if possible, 1600, it'll give you better performance, but nothing too great. You don't have a great motherboard, but that still shouldn't give you this kind of performance. nVidia will get it fixed, they better, because they've got one of the largest and most demanding fan bases, and paying 400 bucks for a GPU that doesn't peform is not exactly something gamers want to experience. I'm having my own customers complain that their GPU is basically slacking out.