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MSI 890FX board CPU core voltage SPIKE under LOAD ???? - Page 3

post #21 of 29
Quote:
Originally Posted by otaku_ex View Post
Not only that, terrible support as well.
I don t agree with this.They RMA ,they update BIOS-es if needed and so on.
Yes they don t talk to you like a girlfriend does but wth ,use facebook for that
   
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post #22 of 29
I mean technical support, bios. They easily forget an old board, is not like asus or gigabyte, they don't leave behind a board that easily.
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post #23 of 29
Thread Starter 
Well, I finaly figured things out.

It look like the Vboost is in fact what is causing the vcore of my CPU to go up when it is under load. However I set the vcore to 1.42v in the BIOS and once in windows running prime95\\under load the Vboost makes the vcore go up to 1.55v / 1.56v. (which I might tweek lower later on)

I did however find out that my CPU is only stable until I reach 3.8Gz, or a multi of 19x, anything higher, such as 19.5x and it's unstable, EVEN if I push or lower the vcore voltage, it makes no difference. Its almost as if AMD or MSI set the max core multiplier at 19x, anything above is not stable... ???

I increased the Bus speed from 200Mhz to 205Mhz (3.9Ghs) and ran Prime95 for 45 minutes wihout any errors. Then I increased it to 210Mhz (4Ghz)... ran Prime for 5 minutes and got errors.

I'm assuming by increasing the BUS speed I will need to increaset the NB and CPU-NB voltage higher... can any one comment on the highest\\safest NB and CPU-NB voltage on my board? and if I will need to increase any other voltage regulator in the BIOS for this?

Once and if I increase hese settings should I watch the NB temps? I'm assuming these are the TMPIM0, TMPIM1 and TMPIM2 in HW monitor ?


My ram is rated 1600Mhz, its presently setup as 4/1 in ratio to the Bus speed, - 800/200Mhz, but I realize 205Mhz is pushing my RAM to almost 1700Mhz.. maybe this is causing issues?

Any idea's or suggestions?

I made it to 3.9Ghz... I'd like the 4Ghz mark if I can...
Edited by thestef - 4/26/11 at 4:59pm
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post #24 of 29
you may have an unlucky chip or your temps are too high.
Edited by otaku_ex - 4/26/11 at 6:53pm
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post #25 of 29
Try 243 x 16.5 for 4GHz. Ram will be @ 1618
lower your CPU volt a little bit more
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post #26 of 29
Thread Starter 
I just lowered ram - bus diviver to 1/3... ram was at 1400Mhz, multi at 19, Bus at 210Mhz. Total almost 4Ghz, still unstable.

I'll see if I can just lower the voltage and see what happens. I think I'm about to give up at 3.9Ghz.
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post #27 of 29
if your chip is running too hot, then there's no way you can reach 4.0GHz
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post #28 of 29
Quote:
Originally Posted by otaku_ex View Post
I mean technical support, bios. They easily forget an old board, is not like asus or gigabyte, they don't leave behind a board that easily.
If there is a issue with a specific model and there are people requesting BIOS-es to fix it they make it ,belive me.
Ask on msiforum if you need help.
But if the mobo is older that 3-4 years ,you may not get help as the board is out of support .Anyway you can find beta BIOS-es if you look carefully on msi forum.de for example.
Msi has something the other s don t have ,a usefull forum ,which is practically unofficial support.Look on asus forum and you will cry ,at least it s what i do when i read it
   
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post #29 of 29
You shouldnt really be needing to touch the FSB at all, just jack the multiplier. Also, you might be unstable because you'll now need to give your northbridge some more juice, try raising that to 1.2v or slightly under 1.2. Put that FSB back down to 200 first and give it a multiplier of like 21.5 or something like that, if that's 4ghz. See how that runs and then as a last resort, play with the FSB.
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