I just tested Resident Evil 0 with Same/Lesser Specs then you and i am getting full speed.
AMD Phenom (Four-Core 3.2Ghz)
4 GB
Radeon HD 5570 1GB
Your system can indeed handle it.
Install CPU-Z and GPU-Z and do screenshots
Get them here
http://www.cpuid.com/softwares/cpu-z.html
http://www.techpowerup.com/gpuz/
AMD Phenom (Four-Core 3.2Ghz)
4 GB
Radeon HD 5570 1GB
Your system can indeed handle it.
Install CPU-Z and GPU-Z and do screenshots
Get them here
http://www.cpuid.com/softwares/cpu-z.html
http://www.techpowerup.com/gpuz/