
Originally Posted by
aln688
I would update to 0904, some people have the attitude if the board doesn't have a problem then don't update it ("If it's not broke, don't fix it"), while others update purely to have the latest BIOS and skip the experience of finding a problem yet undiscovered - I'm the latter.
For overclocking, my system runs at 4.2 GHz on a Mega Shadow, very well actually. Here's some of my settings, although bear in mind with every CPU being different inside, settings cannot be applied from one system to another.
CPU Ratio: 21
Base Clock: 200
DRAM Frequency: 1603
UCLK Frequency: 3208
QPI Link Rate: 7218
CPU Differential Amplitude: 800 mV
CPU Voltage: 1.23750
QPI/DRAM Voltage: 1.35
DRAM Voltage: 1.65681
Hyper-Threading: Off
Turbo-Mode: Off
Load-Line Calibration (LLC): Enabled
I hope that helps you somewhat. When overclocking, I do this, set the QPI/DRAM Voltage to 1.35 and the RAM to the recommended voltage per the manufacturer (example, my Corsair modules state 1.65), then put the CPU Voltage to a value very low, such as 1.15. Then do a 5-minute test (Problem Size = 10000) in LinX, then a full memory test in LinX (Problem Size = 36585), then a 24-hour test in Prime95 Blend.
If any of the tests fail, keep bumping up the CPU Voltage a notch until its stable. The reason is that it's too difficult to work out why a test failed, either due to the CPU, QPI/DRAM or DRAM Voltages, so you eliminate two of the voltages by putting them to their highest safe values, then you work with the CPU Voltage and notch it up until your system is stable. The main reason is, only the CPU Voltage can affect the CPU temperature, the QPI/DRAM Voltage does not.
For my system, I left the QPI/DRAM Voltage at 1.35 and DRAM Voltage at 1.65 as that is what the board set when I chose XMP from the profiles in the BIOS, and those aren't unreasonable values considering I'm running at 4.2 GHz and I have 12GB's of 1600 Mhz CL7 RAM modules.
With the values above, my system is stable for 24 hours in Prime95 Blend and 20 passes in LinX using all 12GB's of memory, with no reboots, freezing or erroring in LinX or the Prime95 results.txt file.
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