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My misfortune with e8400's...so far? - Page 2

post #11 of 48
Thread Starter 
Quote:
Originally Posted by homestyle View Post
What motherboard BIOS version are you running?

Try updating the motherboard BIOS.

45nm chips weren't compatible with the bios versions that shipped before the 45nm chip was introduced.

F8a might do the trick if you haven't already done so.
I am running BIOS F8b :/

And I'm waking up for work just as I expected - 9 hours of Orthos and still going.

If my ram couldn't handle 900mhz - would Orthos run for 24 hours? Or should Orthos strictly be used to test a FSB / CPU overclock?

It's just weird because it runs @ 3.6ghz ...a 600mhz overclock - with no change to voltage. It's like it wants to be running at this speed. But the second I try to go to even 3.8ghz it wants at least .075 extra vCore. Today when I get home I'm going to experiment higher FSB with an 8 multiplier. Maybe I can hit 500mhz with some cooling on my northbridge. Not exactly the route I wanted to go but I've heard of a few people with this board doing it.

I'm off to work and going to leave Orthos running - It should be at about 21 hours if it keeps going until I get home. I'll consider that stable enough for me to consider this a possible 24/7 overclock, just a few hundred mhz lower than I had hoped.
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post #12 of 48
Quote:
Originally Posted by Static|X View Post
I'm currently set up at 3.6ghz with 8x450FSB.
My ram is running @ 900mhz 4-4-4-12 timings with 2.1v.
I've got 0.2+ on the FSB and northbridge.
I lose about .05 after vDrop (1.3v in BIOS to 1.25v under load).
As you said it runs Orthos stable like this but what test? Small FFTs or Blend? If its Small FFTs, I've heard this mainly runs in the CPU cache so I don't think its testing your FSB NB / Ram very much. If its Blend, probably your MB is happy with the 450 and then maybe it is your CPU needing more voltage.

I think a lot of people who could get to 4G the 9x450 way with safe volts went the 8x500 way. I stayed with the 9x but couldn't quite get to the elusive 4G mark, i.e only 3.8G by 9x423 @ 1.344v.

I'll wait until the E8400 becomes 'old news' (and cheaper), and then I might try getting to 4G again without being too worried about just going over safe voltage.
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post #13 of 48
"I think a lot of people who couldn't get to 4G the 9x450 way with safe volts went the 8x500 way. I stayed with the 9x but couldn't quite get to the elusive 4G mark, i.e only 3.8G by 9x423 @ 1.344v."

Can't type tonight...
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post #14 of 48
I'm running 4GHz (9x450) at 1.31v... I've even done 1.28v with Prime95 for 9 hours but during games it became unstable so I went back up to 1.31.
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post #15 of 48
Thread Starter 
Quote:
Originally Posted by Xtek View Post
I'm running 4GHz (9x450) at 1.31v... I've even done 1.28v with Prime95 for 9 hours but during games it became unstable so I went back up to 1.31.
I envy your cpu.
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post #16 of 48
I don't know if it's my batch or what... when I first got it I went straight to 4.05 (9x450) @ 1.24v (stock) and ran Prime95 for 9.5 hours straight.
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post #17 of 48
Thread Starter 
maybe my motherboard just isn't having it?
if i bought any 780i board it'd probably be the eVga ...seriously considering buying one today...
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post #18 of 48
anytime you change the fsb and not the ram (or vice versa) you are changing the divider. It doesnt matter if you can select 'unlinked' and manually type in the numbers the divider still changes. Simple as that. So if you are trying to say intel chipsets have a set of dividers it can run then that would be correct. Intel does this to reduce compatibility issues.

You need to think out side the box, once again just because you cant select 'unlinked' doesnt mean it isnt.

Quote:
Originally Posted by MADMAX22 View Post
I was under the impression that unlinked was the ability to change the fsb without changing the ram speed. With intel chipsets you can change the divider however which ever divider you have set as you change fsb the ram speed will also change. I dont think he is wrong in saying that you cant unlink your memory with intel chipsets, pretty sure it is you that is missinformed.


Oh and at the OP try to run memtest with your settings before you fire up your os. This will help factor out the NB and memory from being the culprits.
    
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post #19 of 48
Quote:
Originally Posted by Static|X View Post
maybe my motherboard just isn't having it?
if i bought any 780i board it'd probably be the eVga ...seriously considering buying one today...
It could be. Though it sounds like if you can't get 9x450 which is what most E8400ers out there seem to be doing than you have to start ruling out variables. You have the same CPU... check. Now I would look for people with the same RAM, Mobo and BIOS etc till you find the difference.
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post #20 of 48
Thread Starter 
Quote:
Originally Posted by Xtek View Post
It could be. Though it sounds like if you can't get 9x450 which is what most E8400ers out there seem to be doing than you have to start ruling out variables. You have the same CPU... check. Now I would look for people with the same RAM, Mobo and BIOS etc till you find the difference.
I guess I thought thats what I was doing by dropping the multiplier and running @ 450x8 and running orthos for 24 hours. I'm guessing this isn't the best way to validate my fsb / ram speeds? I'm planning on running a few memtest rounds when I get home tonight.
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