aristide1 wrote:
Upon researching what I am doing right and wrong I found out the following:
1. My motherboards BIOS has a "SAFE MODE" that is not going to let me boot the system with an FSB above 230MHz, unless I ramp the voltage up to 1.5V from 1.35, where it will give me 5 more MHz, which is nothing.
2. People with high FSB's set their FSB in Windows after they boot up.
3. There do not appear to be any tools to accomplish this task in Ubuntu, though I will waste some time by looking for some.
This is my TForce board with the 6100 chipset. I can bypass "Safe mode" in Windows but at the expense of slower processing. Instead the future for this setup will be a X2 Black Edition with has unlocked multipliers. Even at the slower FSB one can still setup this processor to run at 3GHz.
Once my little experiment is concluded, I will have 2 similar boards, both with an X2 processor, and both running around 3Ghz. The difference will be the one will achieve 3GHz by running 10* 300MHz FSB while the other will achive it by running say 13*230MHz FSB. Both will be running Ubuntu then and I will be curious if one runs dramatically faster then the other.
I will say this (do I ever stop talking?), as I was increasing the FSB on the 7050 board there were several instances where all of a sudden checkpoints started taking longer. I suspect, like the Intel NB, that divider frequencies must have changed, slowing some settings down in order to remain stable. I don't expect to see a 1:1 correlation with overclocking percentages and time saved per checkpoints. I will also say that slower memory will definitely show up in your times.
Here's a simple way to determine the actual speed of your memory with the AMD divider setup.
Lets say you have the bargain basement X2 4000+, now at $57 at the Egg, and DDR2-800 memory (actual speed 400MHz).
So
2100 MHz (processor) / 400 MHz (memory) = 5.25
The divider can only do whole numbers and must round up, so it does
2100 MHz (processor) / 6 (the divider above rounded up) = 350MHz.
So DDR2-800 will actually run as DDR-700. This calculation is done ONCE and only at stock speeds, so if you OC you add whatever the result whatever you increased the overall FSB, 10%, 20%, 50%.
Now here a kicker with the 4000+. As you see above the memory will run slow, but the 7050 motherboard allows you to set the cpu multiplier from 10.5 to 10, which is a great thing. So you ask, why? Well
2000 MHz / 400MHz = 5 ergo,
2000 MHz / 5 (no rounding up) = 400MHz. So DDR2-800 runs at, duh, 400MHz as DDR2-800.
Now suppose you want your processor to still run at 2.1GHz, well increase the FSB 5% (negligible) and now you once again have a 2.1 GHz processor but now the memory is running DDR2-840 instead of DDR-700.
FYI a processor running 2000MHz with DDR-667 (333MHz) results in a completely even 6 divider as well, no rounding on this pair of settings.
Goal - complete a 1760 WU in under 36 hours, or 2 WU every 3 days.