I have just recently bought a custom gaming PC but can't run Deus Ex well.?

CPU: AMD FX 4100 Black Edition

Operating System: Microsoft庐 Windows 7 Home Premium 64-bit

Motherboard: Gigabyte M68MT-S2P

Memory: 8GB DDR3 1333mhz (2x 4GB)

Hard Drives: 500GB S-ATAII 3.0Gb/s

Optical Drive: 22x DVD卤RW DL S-ATA

Graphics card: NVIDIA GeForce GTX 550 Ti 1GB

Sound card: Onboard 7.1 Audio

Case: Xigmatek Asgard

PSU: 400W Xigmatek



As you can see these are pretty decent specs. I have seen plenty of YouTube viedos running Battlefield 3 on a computer with the exact same specs as these on High to Ultra settings with no problems at all. But I cannot play Deus Ex Human Revolution without there being an insane amount of lag, I didn't even have this problem on my old computer with much worse specs. Can anyone suggest a solution?I have just recently bought a custom gaming PC but can't run Deus Ex well.?
http://crashfixes.com/deus-ex-human-revo鈥?/a>