BIOS and Overclocking
| FSB Data Rate | FSB-400 to FSB-3000 MHz (1 MHz) |
| Clock Multiplier Adjustment | Yes |
| DRAM Linked Ratios | Automatic, 1:1, 5:4, 3:2 |
| DRAM Unlinked Data Rate | DDR3-400 to DDR3-2500 |
| PCIe Clock | 100 to 200 MHz (1 MHz) |
| CPU Vcore | 0.51250 to 2.00000 Volts (0.00625 Volts) |
| CPU FSB Voltage | 1.20 to 1.55 Volts (0.05 Volts) |
| Northbridge (SPP) | 1.30 to 1.55 Volts (0.05 Volts) |
| Southbridge (MCP) | 1.50 to 1.75 Volts (0.05 Volts) |
| DRAM Voltage | 1.50 - 2.275 Volts (0.025 Volts) |
| CAS Latency Range | tCAS: 5-11; tRCD: 1-15; tRP: 1-15; tRAS: 1-63 |
XFX nForce 790i Ultra BIOS settings offer a little broader frequency range than most previous-generation products, but the improvements are comparable to current third-party designs from Asus and MSI. Nvidia’s scarcity of manually-selectable “linked” memory ratios comes back over and over again.
The deceptively-named System Clocks BIOS menu provides only PCI-Express and HyperTransport Interconnect frequency adjustments, otherwise focusing on bus multipliers.
FSB and Memory clock speeds are found within the FSB & Memory Config menu. This is also where the memory timing sub-menu link appears.
Memory timings are adjustable to all reasonable settings, allowing top performance at any reasonable memory speed.
Voltage settings are a little more conservative, but broad enough to take most hardware to its limit.
