The Maximus Formula Thread - Help/OCing/Guide/Rampage conversion

[panfist]

So seems that fix for 45nm clocking on x38/48 is FUD?

I'm trying to figure out what you mean...but my head just sploded.

[ChaosMinionX]

I'm trying to figure out what you mean...but my head just sploded.

Overclocking limitations of X38/48 chipsets with 45nm Penryn chips (X3350, Q9450) especially of the Asus variety have a really hard time breaking 440FSB.

It was said that Asus was working on this issue according to a Dutch forum, and someone who had contacted Asus BIOS Engineers to figure out the problem.

Nothing has been seen of this since about 2 weeks ago.

[panfist]

Overclocking limitations of X38/48 chipsets with 45nm Penryn chips (X3350, Q9450) especially of the Asus variety have a really hard time breaking 440FSB.

My FSB has no problem breaking 440MHz, but my E8400 isn't a very good one because past 3.4 or 3.5GHz, it needs 1.36V or more to stay stable...which is more than I want to feed it 24/7. If they do release a BIOS that let's me drop my vcore that would be awesome, but I'm pretty happy with 3.4GHz @ 1.3Vcore.

Anyway I just got my GSkill 2x2GB PC8000 kit and I'm beginning to mess around. It would not boot at 800MHz 4-4-4-12 2.1V, but it will at 2.14V. That's in the motherboard, I'm going to measure with a multimeter tomorrow because I don't want to feed too much past the rated 2.1V. The bad performance at 800MHz leads me to believe that maybe it won't boot at the rated 5-5-5-15 1000MHz, if so then I will RMA the pair.

I just did some brief benchmarks in Everest...at 780MHz 4-4-4-12 my latency is 66ns. At 800MHz 4-4-4-12 my latency is 72ns. I haven't messed with the subtimings yet, but if I'm stable overnight at 4-4-4-12 800MHz (and they actually boot at the rated speed tomorrow) I will begin messing with the subtimings.

I hope that I can find some settings around 420MHz FSB (x8 multi) with latency at or under 66ns. Those would be my ideal 24/7 settings.

EDIT: I still would like to know two things...1.) is the vdroop mod reversible if I don't like it....2.) where the heck do you measure vcore with a multimeter??? CPU-Z is reading that my voltage fluctuates by up to 16mV under load. It could be more, I think the smallest change it registers is 8mV. This seems like a lot to me...

[ChaosMinionX]

My FSB has no problem breaking 440MHz, but my E8400 isn't a very good one because past 3.4 or 3.5GHz, it needs 1.36V or more to stay stable...which is more than I want to feed it 24/7. If they do release a BIOS that let's me drop my vcore that would be awesome, but I'm pretty happy with 3.4GHz @ 1.3Vcore.

Anyway I just got my GSkill 2x2GB PC8000 kit and I'm beginning to mess around. It would not boot at 800MHz 4-4-4-12 2.1V, but it will at 2.14V. That's in the motherboard, I'm going to measure with a multimeter tomorrow because I don't want to feed too much past the rated 2.1V. The bad performance at 800MHz leads me to believe that maybe it won't boot at the rated 5-5-5-15 1000MHz, if so then I will RMA the pair.

I just did some brief benchmarks in Everest...at 780MHz 4-4-4-12 my latency is 66ns. At 800MHz 4-4-4-12 my latency is 72ns. I haven't messed with the subtimings yet, but if I'm stable overnight at 4-4-4-12 800MHz (and they actually boot at the rated speed tomorrow) I will begin messing with the subtimings.

I hope that I can find some settings around 420MHz FSB (x8 multi) with latency at or under 66ns. Those would be my ideal 24/7 settings.

EDIT: I still would like to know two things...1.) is the vdroop mod reversible if I don't like it....2.) where the heck do you measure vcore with a multimeter??? CPU-Z is reading that my voltage fluctuates by up to 16mV under load. It could be more, I think the smallest change it registers is 8mV. This seems like a lot to me...

I probably should have been more specific..... they dont do well at all when clocking a quadcore 45nm.... thats where the 440FSB comes in, and I highly doubt its the chip as almost everyone has run into the same problem.

@Tony - Awesome info man , think you could explain a little what exactly the channel clock skew option does?