Not Reconising over 3.40Ghz Overclock? Please advise

a98pmalcolm

a98pmalcolm

a98pmalcolm

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10 Oct 2010
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51
Hay all ok. Iv just joined this site as i think theres some pros out there that can help me.

Im new to overclocking cpu's so you will have to bare with me if i come accross a bit of a noob.

Before i explain my problem i will list my hardware i used to build my gaming rig that i have been running for just under a year as this is to help assist in you guys helping:

Case: Antec 900
Motherboard: Gigabyte EP43-DS3
CPU: Intel Core 2 Quod Q9550
Memory: Samsung PC2-6400 (400 MHz) 8GB In Total (I know its not brillient)
Graphics: ATI Radeon Sapphire HD 4850 x 2 Crossfired
CPU Cooler: Coolmaster TX2 (upgarding to watercooled at end of month)

Ok I think thats all you will need to know. Now to explain my problem.

A week or 2 ago i found out my Intel CPUs can be overclocked to 4.2Ghz (being that you have supreme cooling ect) but as im still running air cooled i wanted to overclock my PC a lot lower than that to a stable condition.

So i succeded in overclocking it 3.40GHz from its factory 2.83Ghz and ran 2 worksheets on prime 95 for 11 hours with real temp monitoring and the avarage temp was 75 Degrees woth no errors. So all is well with that overclock and it runs nicely.

Now. With the cooling i have atm i feel i could easyly run it at 3.80GHz. So i got into bios to start making adjustments to set the CPUs at 3.80GHz. Once im happy with the settings i save and restart. BUT i get a DOUBLE BOOT meaning in Gigabyte terms the overclock has failed and restarts its to stock which is at 2.83Ghz.
I open CPU-Z once windows has started and. yes its booted to stock. So i restart into bios and its set at 3.80GHz.

So to summerise i can overclock from stock (2.83GHz) to a safe 3.40Ghz BUT i cant get any higher 3.80GHz not even 3.60Ghz when i try it double boots to stock.

What am i doing wrong?
Please help

Many Thanks
Paul
 
Last edited:
are you adjusting the voltages as well?
more speed needs more voltage going to the CPU.
Also, intel cpus aren't my forte, but increasing the NB and fsb volts a tad might help stabilise it as well.
 
dave_beast said:
In the BIOS, when you set the CPU overclock, what is Ram clock at? It sounds like the rams causing the non posting.
Click to expand...

my fear was the ram

The frequentcy is at 800Mhz and the timings are at 6-6-6-18

Yes the volatages i hav really played around with even to a risky 1.4V that still didnt sort the problem so i set it back to 1.3V for my 3.40GHz overclock
 
Try underclocking the ram, and bumping up the cpu to 3.8 to see if that works.
1.4v Vcore is ok in bios on 9550, just use CPUZ to check VID (Vdroop under load etc)
 
dave_beast said:
Try underclocking the ram, and bumping up the cpu to 3.8 to see if that works.
1.4v Vcore is ok in bios on 9550, just use CPUZ to check VID (Vdroop under load etc)
Click to expand...

And how would i not clock the ram?? I think it does it automaticly... see here comes my noob questions... when i was all sounding to clever in the previous posts lol :rolleyes:
 
Here are my screens in MIC if these help. When setting the OC to 3.80GHz i cand seem to keep the RAM frequentcy to around 800MGz





I have a big feeling i have a RAM issue.. :(
 
set pcie frequency to 100

dram performance enhance, remove turbo
system memory multiplyer dont use spd try to set 2x manually
dram voltage try 2.1
 
Have a look at your ram (physically) and see what the sticker says your voltage should be. For example my OCZ ram has a specified voltage of 2.2. The default of the motherboard was 1.8. Your ram might not be meant to run at 1.8 - but I am not familiar with the kit you are using so have a look and see.

One other thing you can do is reduce your multiplier of the CPU by quite a bit. And see what your maximum FSB is. It might just be that your CPU does not have what it takes to clock that high. Not all CPU's can clock to 4GHz sadly. Or even to 3.8GHz. :D Doing what I have suggested will put less strain on your cooling and your overall system. Because while testing for high FSB you are not pushing the CPU to insane frequencies that need the extra voltage. AND voltage equals heat.
 
On the RAM sticker it didnt state the amount of V its needs to i found out off the Samaung website its
min: 1.7
AVG:1.8
Max:1.9
So i have set it to 1.9.
These CPU's can go up to 4.2GHz with the correct cooling.
I messed with the multiplyer and FSB setting to get equivilents but then it will double boot. Even at 3.40GHz so the multiplyer needs to be at 8.0 + 0.50 so still no such luck....
 
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