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I recently build a new system, specs below:

CPU   -   E6750 @ 2.66GHz 333Hz FSB
GPU   -   XFX 8800 GTS XXX ed
RAM   -   Corsair TWIN2X2048-8500C5D
Mobo   -   P5N32-E SLI

Power  -  Enermax infinity 720W,

The memory is rated at 2.2V Vdimm PC 8500 and is SLI certified.  However when I go into the bios (1103) and change the memory type to SLI (0% CPU overclock) the systems boots normally.  When I check voltages in PC Probe II they seem awful high: NB is at 1.4V and Vcore is at 1.5V.  Is that normal? 
When I decided to set memory to unlincked and all of the voltages manually (Vcore - 1.35, SBcore 1.54, CPU VTT 1.25 and NB 1.23) I couldn't even get into Windows.  I reset the BIOS to defaults and was able to load the OS, LAN died.  I kept getting "slow connection" message until the cleared CMOS!!!
I wonder if anyone has suggestion as to what I am doing wrong.  Also is it better to set the voltages manually of keep them on auto?  Any suggestions as to what a good OC profile for the type of system I put together is.  Thanks.


Thanks for the info.  I actually did finally get it to work.  The problem was a 12V 4pin/8pin connector located next to the CPU socket.  The cable from my PSU was not plugged in all the way.  I have an Antec P182 case with the PSU compartment all the way at the bottom.  I just got an 8 pin EPS extension cable and everything works fine. 

 What made you think that Core 2 Duos will not work with a 8 pin EPS connector?  All things considered the potential is still the same.



 Recently I decided to upgrade so I went with P5N32-E SLI Mobo, E6750 CPU, Enermax 720 SLI for power, XFX 8800 GTS GPU, Corsair Dominator TWIN2X2048-8500C5D  in an Antec P182 case coupled to several WD hard drives.  Unfortunately after spending about 5 hr putting it all together the system didn't post.  Does anybody knows if E6750 requires an 8pin EPS or just a 4 pin 12V? 

I do not have a spare system to test each of the components so I am thinking my Mobo is probably dead although I am not sure.   Any suggestions on how to get system to post are appreciated.  Thanks.

I am running a P4 2.53 Ghz with 2GB of RAM and X1950 Pro. I think that my CPU is a bottleneck, although I am not completely sure.
What CPU do you guys think is a bottleneck for Radeon Sapphire 1950 Pro 512 GDDR3?
I am thinking of upgrading my CPU. I am running a northwood 2.53 on Windows XP SP2. Does anybody know if I would have to reinstall the OS is I swap CPU's (Northwodd 2.53 for Prescott 3.4). Thanks.
I am pretty sure I reset CMOS properly. I even took the battery out for about an hour. I now think the reason why I fried my MoBo has to do with the voltage settings. I don't think the ABIT's IS7-E2 can function with 90nm CPU's, it was designed for 130nm process. Hence the voltage settings are different. I ordered a new MoBo from MSI (Neo-2 Platinum Ed) and, hopefully, it will post. I am just concerned about the CPU and memory which may have gotten fried in the process. Also I have an Antec 500 Watt PSU, so it should, in theory, be able to handle Prescott (hopefully).
I recently decided to upgrade from my P4 2.53 (533MHz) to a P4 Prescott 3.4 (800 Mhz). I have (had) Abit IS7-E2 motherboard and after checking for compatability did not hesitate to swap processors. After the swap the system posted and a few seconds later system shut down. Even though I did reset the CMOS I did not even get a post with my old processor. Does anyone know if the mobo is fried along with the CPU and memory or just the mobo? Thanks for the info.