No problem. I tried 1.74V on cheap Kingston KVR1333. It isn't even hot when touched.

You just have to ensure Vtt difference is not more than 0.5V. Usually motherboard BIOS will take care of this for you.

Cheap value RAM only. Moreover it comes with warranty. I wish I can burn it off but it just wouldn't.

How much VTT you using for 4000 uncore?

How much can the PWM withstand? DFI monitoring software already show red @ 60C.

The 21th multiplier is being throttled down @ 4GHz settings. Temperatures are fine except for PWM that is over 70C. Is it over-current protection?

I did Set VR Current Limit Max: Enabled and it no longer throttle down. Thanks

I manage to hit 4GHz, but the system couldn't sustain. While Linx never gave error and neither Windows BSOD or acted weirdly, DFI monitoring software alarms me for a great dip in voltage for
Vdimm: ~1V
+5V: 0.somethingV
Vcore: 0.9V

Then few seconds later whole system will shutdown (not restart/BSOD) and stay off until I manually start the system. I also noticed that the PWM temperature are 75-76C when this happened.

PWM overheating? PSU can't cope?

PWM OCP set to 140A. PSU is Silverstone ST-56F

This post has been edited by mengsuan: Nov 17 2010, 11:47 PM

Okay, I'll get a fan to blow and try again. If I remove the PWM heatsink, warranty would be void. Moreover I heard it's difficult to align the heatsink for perfect contact again.



Sidenote: Why -12V rail has a ridiculous reading?

This post has been edited by mengsuan: Nov 18 2010, 12:01 AM

You sure your HDD can survive 126MHz PCI-E clock?

Could be data corruption or premature HDD failure.

PCI-E clock will affect the stability HDD, sound card, ethernet controllers, graphics card and possibly other devices also.

Minor tweaking can improve stability but 126MHz is usually too high for a stable set up.

This post has been edited by mengsuan: Nov 19 2010, 09:39 PM

Can I bring my i7 920 over to your house and let you clock to things like 4.6GHz? Lol.. Even with CM212+, anything above 4GHz is too hot to handle.

Don't worry. I've tortured my i7 920 at that kind of temperature. Still rocking

Well, not always. In the end I upgraded HSF. This was stock HSF:

Can't remember. I think I tried up to 3.8GHz before, on Hyper 212+. PWM too hot for prolonged usage.

So I'm back to 3.3GHz@1.0V now actually. Save some power.

Yup. Huge difference but motherboard PWM still hot and limiting my overclocking.

My supposedly stable DFI DK x58 machine starts to not respond from a suspend. I prime kao kao already, I can't find the issue.

This post has been edited by mengsuan: Aug 9 2011, 10:34 PM

When computer enters to sleep, it wouldn't wake up randomly. Not always, just rarely. Then motherboard diagnostic code is CF - something to do with memory. Then it won't be able to start until I reset CMOS

Hmm, last time it wasn't like that and this doesn't occur every time.

The only thing I think of is, I flashed the BIOS without reloading the proper version of DFI ABS profile(the one that saves your BIOS settings). Their lousy website download can't work either. Piff

This post has been edited by mengsuan: Aug 10 2011, 11:10 AM

Thanks. Will try.

At the mean time I'm stressing my system, I fiddle around with PWM and DRAM phase. What does the 1 or 2 phase and phase frequency do?

This post has been edited by mengsuan: Aug 10 2011, 09:21 PM

I changed my motherboard to wake up with keyboard hot key only aka Ctrl+F1 etc. Power button will not wake up the system now. And you know what, so far it works fine! Maybe my casing's power switch is not good already, giving intermittent signal when pressed(?)

I am changing the phases and phase frequency to reduce PWM temperature. What I noticed so far is, 2 phase is cooler than using single phase. Tonight is to find out about the phase frequency.

Reading this thread reminds me of DFI's promise to release a program called Smart PWM for their boards. Until now, it's no where to be seen. Piff

On the fly control of voltage and phases. From the advertisement they made, users can see the current draw from each PWM phase live in Windows.

Yeah but the program never came. Kinda sad with what DFI is today. My Lanparty motherboard is forever alone.