AMD PHENOM II X4 955 PROCESSOR REVIEW BY ULTIMATE HARDWARE - "AMD Phenom II X4 955 review also featuring the AMD Phenom II X4 920. The AMD Phenom II X4 955 type Deneb is a Socket AM2+ Processor operating at 3200Mhz while the AMD Phenom II X4 920 is also type Deneb but operating at 2800Mhz which means the AMD Phenom II X4 955 should be 13% faster than the AMD Phenom II X4 920. Will the benchmarks show a clear advantage for the AMD Phenom II X4 955"