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Home > Hardware Reviews > PC Parts

Monday, April 30, 2007
EVGA 680i LT Motherboard

4. BIOS

The BIOS is from Phoenix:

In the Advanced Chipset Features, we can control all the major configurations for the board:

First, let's take a look at the System Clocks:

Here you can set the CPU Multiplier and PCIe MHz speeds. Disabling Spread Spectrum will allow higher overclocking speeds. The next setting (FSB & Memory Config) is probably the most important, since from here you can control the FSB and memory speed/timings:

As with all 680i boards, the FSB and memory can work either linked or unlinked:

This allows very good control of overclocking, since for example, memory MHz could stay low (800MHz), while CPU FSB increases, independently. Auto mode usually selects "Safe" settings. You need to adjust them in order to get the maximum speed. If FSB and Memory work together, you can set the FSB:RAM ratio:

Each setting represents a different FSB:RAM ratio, so be careful what you select:

  • DDR2-533 (1:1)
  • DDR2-667 (4:5)
  • DDR2-800 (2:3)

In the memory timings sub-screen, we can set all known settings. Here, there are two options "Optimal (auto)" and "Expert (manual)":

Passing to the "CPU Configuration" screen, we can disable C1E:

Lastly, system voltages can either be set Auto or manual:

Memory, CPU, FSB and SPP voltages can be set according to the following table.

BIOS Setting Feature:
CPU Clock Multiplier
Auto, 6x-11x in 1X increments
CPU bus frequency
Auto, 400 to 2500 QDR (100~625)
in 1MHz increments
CPU voltage
Auto, 0.80000V to 1.60000 in 0.00625V increments
DRAM voltage
Auto, 1.80V to 2.50 in .10V increments
PCI Express frequency
100MHz~200MHz in 1MHz Increments
NB voltage
Auto, 1.2V, 1.3V, 1.4V
FSB voltage
Auto, 1.2V, 1.3V, 1.4V

Compared to the standard 680i BIOS, the 680i LT cannot control HT and MCP voltages, while the FSB/NB voltages are limited to 1.4V. Hardware monitor is needed to see how hot your CPU runs:

What's rather inconvenient is the fact that the official EVGA flasher works only under DOS(!)




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