Max FSB using IP-35 pro is 360MHz!?

[Odaik]

hello,

I'm using the Abit IP-35 pro motherboard, and an E6600 CPU.

I recently received 4 sticks (2 pairs of the same version) of memory (4GB). However, I've been having serious problems running these at the full speed of 1066MHz. I know most of the time you must reduce the speed when using 4 sticks, but in the past, I've solved this issue not by reducing the speed, but by reducing the FSB😀RAM ratio, and increasing the FSB. For example, in one case, I could not run the RAM at 1066 using the ratio of 1:2. So what I did, was OC the FSB tp 355MHz, and put the ratio to 1:1.5 instead (still 1066). This was totally stable.

After receiving these new sticks, I tried to do the same, but it wouldn't work. So, I decided to try the next ratio down, which is 1:1.25. This would need an FSB of 426MHz. However, I've been trying for ages, and simply cannot get the system to run stable at any FSB above 360MHz! People have said they can get this motherboard to be stable at speeds close to 450MHz, with no tweaks.

Despite increasing the MCH voltage (incase it was the 4 sticks causing the problems), I still get the FSB problem. So, instead, I tried removing 2 sticks, and leaving 1 pair in. However, I still get the exact same problem! Nothing is stable above 360MHz!! I'm totally stumped. 🙁

 

[Mondoman]

"People" are using a different CPU, motherboard, and RAM. You can't tell if your MB is the limit unless you know that your specific CPU and RAM modules will work at higher speeds on a different MB.

 

[kyeana]

can you get it stable when using a 1:1 ratio?

 

[Odaik]

hello,

Yes, I've tried using a 1:1 ratio. However, there remains absolutely no difference in the issues. It seems to be purely an fsb problem. 🙁

 

[outlw6669]

That motherboard is only rated at a 333Mhz FSB.
They can't all be winners.

Just to be sure it is not something else, drop your RAM to a 1:1 ratio and the CPU multiplier to 6x.
If the FSB goes higher stably, something else is limiting your overclock.

 

[Odaik]

hello,

I understand different motheboards of the same model have different capabilities due to the batch process of manufacture, but the differences would be reasonably small. Not being able to go beyond 360, whilst others can hit over 500MHz is quite a massive difference IMO.

I'll try setting x6 tonight to see what happens. Should I keep the CPU voltage at 1.36V (the overclocked setting)?

 

[outlw6669]

Yes, you should keep the CPU voltage high for now.
The extra voltage will help ensure stability while you are testing your motherboard.

IMO, over 500Mhz on any motherboard is an unrealistic expectation.
While I agree it should run a bit faster, at least at 400Mhz, it would not surprise me if it was limited to less than that.
The part was only designed to run at a certain speed.
Getting anything above it's rated speed is a luck of the draw.
They can't all be winners and just because some are vocal about high quality parts doesn't mean they all will run that fast.

 

[jitpublisher]

hello,

I understand different motheboards of the same model have different capabilities due to the batch process of manufacture, but the differences would be reasonably small. Not being able to go beyond 360, whilst others can hit over 500MHz is quite a massive difference IMO.

I'll try setting x6 tonight to see what happens. Should I keep the CPU voltage at 1.36V (the overclocked setting)?

Running anything above what the board is rated is about 75% skill and 25% pure luck.
Most boards made may well indeed go way past what the rated speed is, but there are always going to be some that simply will not. You may have gotten one that simply won't do it. 500mhz is a big number, and just because someone says theirs will run that don't mean a thing. They may have got it to boot into Windows long enough to run benchmark or take a snapshot of CPUZ, but I really doubt you could have called it a stable overclock.

 

[Odaik]

hello,

Thanks for your advice guys.

Do you think I BIOS update could help?