INFO: Abit KR7A(-R) Optimal Bios settings
As far as the KR7A is concerned here are a few tips that worked for me. These settings are what I use for maxed performance.
CPU Speed: User Define
FSB: Your choice
Speed Error Hold: Disabled
Voltages: As you see fit. I recommend you start with 2.75 DDR voltage to overclock.
CPU Command Decode: This is an important setting! For <150FSB set to Ultra, 150-200FSB set to Fast (using Ultra above 150 or so can cause stability issues...Your Mileage May Vary)
Advanced Chipset Features Setup-
System Hole, System BIOS and Video RAM: All Disabled
DRAM Clock/Drive Control-
DRAM Clock: 133MHz (do not set to SPD if overclocking)
DRAM Timings: Manual
DRAM CAS Latency: 2
Bank Interleave: 4-way
Precharge to Active: 2T
Active to Precharge: 5T (6T is more stable only if needed)
Active to CMD: 2T
DRAM Command Rate: Another important setting! Use 1T at 133 to 150 or so, 2T at higher FSB speed. 1T will limit your overclock so experiment with it. I have found that you'll get better overall performance by using 2T and running a higher overclock)
AGP and P2P Bridge Control
AGP Aperture Size: 128M (smaller of 128 or 1/2 of RAM)
AGP Mode: 4x (works fine to 200FSB for me)
AGP Driving Control: Auto (works fine for me)
Fast Write, Read Master and Write Master: All disabled (for max stability)
CPU and PCI bus control-
Default settings fine
If using 2 sticks of memory try using DIMMs 2 and 4 (works better for many users when overclocking).
Hope that helps!
Thx Jmke, this one helped a lot.
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