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Q9450 OC nightmare?

post #1 of 118
Thread Starter 
Hi there,

As I'm starting to OC my machine, I seem to have a real OC problem with my system (maybe related to the RAM Modules?). My current HW is:

MSI X38 Hydrogen (watercooled edition of the X38 Diamond)
Intel Q9450 with EK Waterblock
Corsair TWIN3X 2048 1333C9DHX kit
HD 3870 X2 with EK Waterblock

Temps remain very low, even when OC'ing (CPU=31°C idle and 36°C under stress)

The problem is I just can't pass the 400 FSB (up until there all goes well, even when I leave all settings on auto). I tried upping the NB, SB, DRAM voltage ... tried just about every possible hint I found on the net but all to no avail! The mobo LED simply stops at DRAM or DDR3 (sometimes even gives DDR2 as status, while only accepting DDR3!!!)

I tried setting the memory on auto, on manual (9-9-9-24 and several voltages), tried to loosen the timings (10-10-10-27) though I'm not at all familiar with these timing settings (any help would be greatly appreciated here as well), changed 1T to 2T, ... but I simply can't pass the 400 FSB ... I've off course changed the divider as well to make sure not to pass the 1333 MHz too much (or even staying way below) but nothing seems to work ...

Does anyone have any ideas why the Q9450 overclocks so poorely (I did see people here on this forum with a 3.9 GHz score though) or should I just buy better memory (would buying like DDR3 1600 or 1800 MHz actually solve the problem or not, don't really understand about those memory restrictions)? I'm not planning to run this beauty on just 3.2 GHz as it remains way to cool to do so ...
    
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post #2 of 118
Get your vcore to 1.36 in CPU-Z which should be like 1.4 (approx) from there see what speed you can push your FSB. Mine didn't really go past 437mhz fsb, I settled at 425 due to heat.

Also, don't mess with the ram but I do suggest 2T.
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post #3 of 118
Since you have such a high FSB, your NB is going to need a lot of voltage. I have to have mine at 1.66v to be stable at 450 FSB (can't go any higher though). Also you are going to have to up your vcore a little, mine is at 1.26v. Your RAM is fast enough, you shouldn't have to buy new RAM but I agree with MrHarris- you should keep it at 2T.
    
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post #4 of 118
Quote:
Originally Posted by gamer_013 View Post
Since you have such a high FSB, your NB is going to need a lot of voltage. I have to have mine at 1.66v to be stable at 450 FSB (can't go any higher though). Also you are going to have to up your vcore a little, mine is at 1.26v. Your RAM is fast enough, you shouldn't have to buy new RAM but I agree with MrHarris- you should keep it at 2T.
I'm running my X38 north bridge at 432MHz right now with no added voltage and folding or gaming around the clock. It only needed +0.10v NB and +0.05v MCH to get to 450MHz. Problem is that the Gigabyte boards don't give their NB voltages in absolutes, only variations from their standard; but I don't believe they had it over-volted in the default configuration.

I would advise dropping to your lowest CPU multiplier just to see if the north bridge is the cause of the problem getting to 400 MHz or if your CPU is. Getting a X38 to 400MHz should be insanely easy.

Rob
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post #5 of 118
Although i cant explain it in detail, I have read where guys hit a fsb hole, usually they go much higher and have some sucess so maybe you can drop your multi 1 and up your fsb more. Point it there are holes and you might be in one
    
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post #6 of 118
Thread Starter 
thanks for those first tips ... definitely going to try but even upping the voltages haven't helped me a lot at this point ... at least now I know it's probably not the RAM so I'll keep on pushing and trying!
    
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post #7 of 118
Thread Starter 
OC'ing is likely to be the greatest thrill ever ... Just tried upping a little and NO MORE BOOT AT ALL! I've reset the BIOS and everything but it hang on either DRAM, either ICH (southbridge not found or malfunction) ...

Leaving it of for 10 minutes finally let me boot the system again! Still I wanna try to get further ...

I have slightly more settings available as what you mention below, maybe I have to change the others as well?

Parameters:

CPU Voltage
Memory Voltage
FSB Terminator Voltage
NB Voltage
SB Voltage
CPU Reference Voltage
Memory Reference Voltage


Anyone any idea's?
Edited by baretsu - 6/1/08 at 6:38am
    
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post #8 of 118
doubt it is the CPU causing the problem I would say it's MB or the monkey that is throwing the switches

as others have said some boards have a bad FSB hole. with that try going straight for lets say 410-425 or so.

also what are you using for PLL voltage? I find with my board that is fairly important

also try going here
http://www.overclock.net/specs.php?do=addsystem
you can add your system so we can see the specs
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post #9 of 118
Thread Starter 
Quote:
Originally Posted by rx7speed View Post
doubt it is the CPU causing the problem I would say it's MB or the monkey that is throwing the switches

as others have said some boards have a bad FSB hole. with that try going straight for lets say 410-425 or so.

also what are you using for PLL voltage? I find with my board that is fairly important

also try going here
http://www.overclock.net/specs.php?do=addsystem
you can add your system so we can see the specs
It is most probably the monkey throwing the switches but hey, I'm just a starting OC'er and that's why I'm here, right? So you people can at least help me out (and at least I'm listening) ... so ... what the heck is PLL voltage? Can't find it anywhere in my BIOS ...
    
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post #10 of 118
can't help you on that one. have never used a x38 board.
but I know that as well as the GTL voltages seem to play a decent part in what you can do with your overclock. even more so with a quad
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