i just update BIOS which is 1408, seems nothing gained. Voltages are all the same with last setup. Hoping to decrease volt a bit~

Haihzzz...

what ram u use bro??
same like ur siggy??
how much vtt is needed to achive 2000Mhz ram speed w/ 4k uncore??

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.

For uncore 4000Mhz u just need VTT around 1.4-1.5v. Watch out for PWM temp windows will reboot once this evil temp hit ~ 100C

P6T doesnt hv PWM aka VRM sensor this cant check its temp 
Even R3E also u hv to plug sensor cable on this area but is not quite accurate.
DFI will throttle once PWM temp exceeds 85C. Ur hybrid digital PWM can withstand temp up to 105C.
But according to Jimmy the DFI engineer, overheat PWM won't cause shutdown 
Somehow this guy keeps mum when I questioned uptil now DFI still didn't managed to overcome the high PWM issues in their boards.
Most DFIs died due to evil code 88 error, this stupid guy replaces the burned CPU PWM IC,w/o knowing that actually it's caused by electric-attribute changed of some components on CPU VCore circuit and damage PWM IC again. Pity those DFI buyers RMA few times again and again. There are many DFI boards still waiting RMA turn at local distro atm.. Good luck.
But now I'm glad that this MF mobo maker has stopped producing LP boards.

It's not too late before the upcoming Sandy Bridge... 

eh...just got my hands on E760,nb/sb quite hot....55c lol
need to buy new mobo wb to cool down the temp...

i think it depend on both bro...
IMC+good mobo = nice vtt
no??
plz correct me if im wrong....

@chenhui87
change ur proc with me+i topup??  

not really sure what's d different .
but r3f should be more than enuf to push ur proc up to 4.2ghz .

if ur planning for WC, then im not sure if r3f WB available or not .

yeap
its up to ur proc imc strength and ur ram capability .
mobo confirm can reach no problem

hahaha
 
im loyal for now

VTT to vdimm combo is the key to achieve a stable 2k dram.

Be sure to active cool the PWM area with fan or waterblock to take care of that VTT >1.4v

Sort out vcore, set BCLK to 200, core multi x17. Test the dram 2k. Once passed then only go for core 4GHz +.

i'm pretty sure that ive seen someone did clock dram 2k on P6T here before.

Sounds like a degrading IMC or wrong bios settings especially those related to RAM. If that's the case you would see "6GB RAM installed (4GB useable) in System Properties in windows.

Try upping VTT voltage.