BIOS
The C51XEM2AA provides the most tweakable BIOS this reviewer has seen on a mainboard to date, so it should provide plenty of scope for the adventurous overclocker, with the following adjustments available.| Setting | Range |
|---|---|
| HT Reference Clock | 100-500MHz, 2MHz steps |
| CPU FID | x4-CPU FIDmax, x1 steps |
| PEG Slot 1 | 100-200, 1MHz steps Auto = LinkBoost (125MHz) with 7900 GTX |
| PEG Slot 2 | 100-200, 1MHz steps Auto = LinkBoost (125MHz) with 7900 GTX |
| SPP-MCP Reference Clock | 200-500MHz 200-210MHz in 0.5MHz steps 20-230MHz in 1MHz steps 230-500 in 2MHz steps Auto = LinkBoost (250MHz) with 7900 GTX |
| HT Multiplier CPU-SPP, SPP-MCP, MCP-SPP | 1-5X in 1x steps |
| Memory Frequency | 400/500/667/800MHz |
| CPU Voltage | 0.3750-1.8500V 0.3750-0.7650V in 0.0125V steps 0.7625-1.8500V in 0.025V steps |
| Memory Voltage | 1.825V-2.500V in 0.025V steps |
| HT CPU-SPP Voltage | 1.225-1.400V in 0.025V steps, 1.21V default |
| HT SPP-MCP Voltage | 1.325-1.500V in 0.025V steps, 1.42V default |
| SPP Voltage | 1.250-1.400V in 0.05V steps, 1.38V default |
| MCP Voltage | 1.525-1.700V in 0.025V steps, 1.70V default |
