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DFI Expert fried another cpu? NCSA this is 4 U 2 - Page 2

post #11 of 29
Thread Starter 
Quote:
Originally Posted by slow'puter
The issue with the fried cpu is as follows:

There is a little voltage control thingy that goes crazy everytime the battery is removed from the board. It causes the system to loose the Special VID at Startup control and it sends the full amount of voltage to the cpu. It has been measured as almost 3v. Double cores and FX chips are more suceptible to fry than single core A64s.

It has been posted by DFI that updating to BIOS 12/07 fixes this issue.

Also, there are a few instances that special VID at startup control is lost when resuming from S3. Bios 12/07 addresses this too.

NCSA was running 12/07... if I recall correctly. Go fig. But it seems that Opterons are as delicate as X2 and FX chips.

SO the moral of the story is: update to 12/07 (recommended by DFI tech support, and the expert design engineer), disable S3, and if you have to up your voltage, use high voltage/low Special VID combination. And avoind removing battery, except for deep CMOS reset.
thanks that was the information I was looking for! I'll have to take a close look at the bios when I set the board up.
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post #12 of 29
Just to clarify, the good 146 is not dead... although I did think so and it happened in the arms of the Expert, so the assumption was made... However it still works but only at 2.9-3.0G and my other 146 only does 3.35G so not that great really.

The Expert is a Good MB... just do not use TCCx modules as the BIOS is not tuned for these... use BH/UTT or 1Gb modules. Also when using a high Vdimm make sure the Vcore is not at default set at least 0.025-0.05 above stock boot vcore to protect the CPU.
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post #13 of 29
Quote:
Originally Posted by ncsa
Just to clarify, the good 146 is not dead... although I did think so and it happened in the arms of the Expert, so the assumption was made... However it still works but only at 2.9-3.0G and my other 146 only does 3.35G so not that great really.

The Expert is a Good MB... just do not use TCCx modules as the BIOS is not tuned for these... use BH/UTT or 1Gb modules. Also when using a high Vdimm make sure the Vcore is not at default set at least 0.025-0.05 above stock boot vcore to protect the CPU.
ok just thought i'd point this out.. Holy crap NCSA has returned! lol
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post #14 of 29
Thread Starter 
Thanks for your response ncsa! I got your pm on dfi-street too. Glad you're back and your cpu still works.

I am a bit worried w/ my RAM as i have TCCD but I don't have money to buy new RAM so I guess it'll have to do.... if I can get windows to install
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post #15 of 29
@ ncsa, why do you say to not use TCCx ram? : glad your back, are you on 'full time' again.

edited.
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post #16 of 29
From what I have been advised the Expert is better suited with non-TCCx, although it will work, the MB prefers to the other modules.

You will have to find where your modules best work but Drive Strength is critical in getting these modules to work well... having said that, there are a handful of people who have got the full potential from their modules.

This is all in relation of obtaining DDR600 from TCCD at 1T on the Expert.

You will fine that they will be ok 1T if the modules are run at 280 or less... of course this also depends on the CPU too.
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post #17 of 29
Thread Starter 
this is probably a stupid question... but the led on the expert that lights up when the mobo has power... is that supposed to be orange? I've only ever seen mobo's w/ green lights
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post #18 of 29
Yes it has one orange led between the 2nd PCI-E 16x alot and the first PCI slot that is always on when ever power is at the board(not booted). It has another orange near the ram to say the the ram is getting power when you boot up. Lastly it has the 4 red diagnostic LEDs which well help when you have problems booting.
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post #19 of 29
@ ncsa, again. Sorry, I dont want to steal the thread, but is there a guide to Drive Strength? I have no idea what it is.
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post #20 of 29
Quote:
Originally Posted by pjlietz
@ ncsa, again. Sorry, I dont want to steal the thread, but is there a guide to Drive Strength? I have no idea what it is.
I could be wrong but I believe that drive strength is the proper voltage that each memory chip likes to get optimal memory siginal integrity. BH-5 liking high voltage and running better the more voltage being pumped in it, and TCCD is a little hard to pinpoint which I think NCSA was talking about such as some will like 3.0 and others like around 2.7-2.8. Basicly I think its the right voltage to get the best stabilty.
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