Problem overclocking e6400 on DS3

E

excelcs

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Mar 5, 2007
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I ordered the following last week from NewEgg + slapped it together:
Gigabyte DS3, e6400, XMS2 PC-6400 2gb, Leadtek px6200td, seagate sata2 250gb, windows xp64.

So during my default install of Windows the system powered off at least twice. Eventually I got that installed. Ran memtest86 on the memory and it was faulty. So I replaced it with OCZ platinum revision 2. Which fixed the initial problem. I installed CPUZ, SpeedFan, Everest, Prime95, & Super PI. I notice my Vcore1 at default 266mhz x 8 was 1.37v. It seemed to run fine.

Then came some overclocking trials... couldn't get anything running past 366 x 8 until I upped the Vcore to 1.45 to get to 375 x 8. In order to get to 400 x 8 I had to up the vcore to 1.525. I ran Super PI, & Prime95, then memtest86 for a night and it seemed to be stable. High temps around 61C, idle around 30c. But if I power down she doesn't want to come back up. I had to reset the CMOS a couple of times. Currently I'm running at 3ghz, 375 x 8 with my vcore set in the bios at 1.475, vdimm at +0.3 (2.1v). SpeedFan & Everest are showing the Vcore at ~1.42. And when I had the system running at 3.2ghz and the vcore set at 1.525 Speedfan & Everest displayed vcore ~1.495.

I was able to run at least 430 x 7 much easier with a vcore of ~1.45. The OCZ memory had no problem handling the overclock.

This blowing out of Windows & power shutdowns concerns me.

Any advise on why I have to push the vcore voltage so high? And why 430 x 7 was easier to achieve than 400 x 8 or 390 x 8?
 
Well, I would check your BIOS version first, see if you are running F9 or earlier. Mine came with the F9 and had a terrible cold boot issue, after a flash to F10, that is completely gone. Also I had a grounding out problem with the metal backplate for my big typhoon to a solder point that was too tall on the back of the mobo. After a careful filing down and some double sided tape placement, that is gone as well. The grounding caused intermittent shutdowns or lack of booting at all....it would make a slight buzzing noise at that point as well....
 
I am not sure, thats odd, my guess is that over 400MHz fsb something changed that your cpu liked a lot better MCH timings most likely.

give the mch fsb and, bah forget the other one +.05 and then .1 and test.

Lock the pci at 100, dont use auto, I beleive that issue has been fixed but it cant hurt to lock it down even if it is at default 100. .

What bios are you running ?

Many people think the F7 bios works best for overclocking, I tend to go with the latest but I dont have that exact board., with the flash utility at the bottom of the main bios screen its pretty easy to make a couple of floppys and swap back and forth to see. I would not recommend using the windows or internet bios updates.
 
BillParrish said:
I tend to go with the latest but I dont have that exact board., with the flash utility at the bottom of the main bios screen its pretty easy to make a couple of floppys and swap back and forth to see. I would not recommend using the windows or internet bios updates.
Click to expand...


That is old info. I have not had a floppy drive in at least 4 years, and I have flashed many BIO's...including my DS3 to F10. From within Vista. I DO reccommend that you flash at STOCK speeds for stability.
 
When I got the board (last week) it had F9, I flashed it to F10.

I just tried the following.
Set the multiplier back to 8.
Set the FSB to 400 (then 401).
Set the PCI to 100 (but it always seems to go back to auto)
Set manual voltages to:
vDimm +0.3 (2.1)
PCI +0.1 then +0.2
FSB +0.1 then +0.2
MCH +0.1 to +0.3
vCore tried 1.45, 1.475, 1.5, 1.525, and 1.55

It won't even post unless I set the vCore to 1.475. Once into windows I start Orthos and within 10 seconds Orthos reports an error... until my vCore is set to 1.55. It then runs for about 10 minutes and reports an error. Even when I set vCore to 1.55 the vCore reading on SpeedFan & Everest fluctuates between 1.47 & 1.5.. but never higher than 1.5.

C1E, EIST, No Execute Memory Protect, & CPU Thermal Monitor are all disabled.

I downloaded F7 through F9 so I guess I'll give that a try. Any suggestions?
 
I can't get to 400mhz fsb either
iam running e4300 9x 378fsb is the highest i can go wiht vcore set to 1.41
i just got OCZ ram pc8800 DDR2 and i can only do 1005 mhz on that
my temps are like 26-32 c with ninja heatsink
 
Well, I think I'm done wasting time! The best (most stable) I've been able to do is 425 x 7 which is near 3ghz. I tried the F7 bios but it worked just the same for me as the F10.

I guess I might have one of the 'off' CPU chips. But it still runs almost 4x faster than the Dell E510 box I have with the duo core 2.8ghz processor chip I bought a year ago!

By the way, the OCZ platinum pc-6400 revision 2 memory works great! Set at 2.1v, 4-4-4-12 running at 425/850. I'm going to pick up another set and get this up to 4gb.

If anybody has any other ideas how to get this past 3ghz please comment.
Thanks.
 
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