Legit Reviews posted an article on the AMD Phenom TLB Patch
AMD Phenom TLB Patch Benchmarked and Explained
Using the PCMark Vantage test suite the difference between having the TLB patch workaround enabled and disabled was night and day. The system didn't feel any slower on the test bench, but the results showed differently. The performance difference ranged from 2% to 11.7% depending on the testing. It's obvious that the TLB workaround impacts performance...
AMD Phenom TLB Patch Benchmarked and Explained