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How to hit 250 MHz CPU Bus Frequency - Page 2

post #11 of 30
Quote:
Originally Posted by njdevilx11 View Post
Yep CPU, RAM, CPU/NB voltage are set manually. 1.35v, 1.65v, 1.2v respectfully
You'll have to up your CPU/NB to like 1.325/1.35v. Make sure you have disabled Turbo in the BIOS if you plan over OC more, as well as anything to do with putting the CPU into slower mode or lower voltages when not in use.
post #12 of 30
Thread Starter 
Ok just crashed P95. No BSOD just lock up. Attached is my BIOS settings. RAM is at 7-7-7-17
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post #13 of 30
Thread Starter 
Quote:
Originally Posted by The Sandman View Post
Are you just jumping to 250 or starting at 200 and making increases by 5-10mhz? Some of the older boards required small increases of 3-5MHz till you reached 250MHz if you're not aware.
I was not aware of this thx lemme try that. This is a very new board though so I thought 250 would be no problem.
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post #14 of 30
Thread Starter 
Quote:
Originally Posted by ht_addict View Post
You'll have to up your CPU/NB to like 1.325/1.35v. Make sure you have disabled Turbo in the BIOS if you plan over OC more, as well as anything to do with putting the CPU into slower mode or lower voltages when not in use.
Oh I didn't know the cpu/nb had anything to do with the ref clock but I will try. All turbo and cnq are disabled.
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post #15 of 30
You need more NB volts, and you need to move in small increments to find your stable limit. You can't just set a 250~ goal and demand your board achieve it.

Your best case is going to be the following:

1. Find your max stable FSB. I recommend getting your NB to 3000~ and your HT Link to 2400~ Start from your stock settings, and slowly move up, doing tests in prime95 every 5mhz increments or so until it's unstable. Once it's unstable, you can try pumping a bit more NB volts to 1.3 or 1.35~. Make sure your board has adequate VRM cooling.

2. Rinse and repeat until adding volts doesn't help, or you hit your thermal wall.

3. After you have done this, you can start inching up your multiplier and adding CPU vcore until it's unstable. Move multiplier up in 1x increments or .5x increments if your board allows. Keep going until you hit the temp wall.

Make sure everything you can set manually (ram timings, voltage, etc) is taken care of, and you disable Cool'n'quiet and other misc power saving/turbo functions in the bios.

Good luck!
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post #16 of 30
Quote:
Originally Posted by njdevilx11 View Post
I was not aware of this thx lemme try that. This is a very new board though so I thought 250 would be no problem.
It very well may NOT be the case and may load at 250MHz, I was just curious. Looking at your last bios pic I'd try raising HT Link Speed to 2000MHz and increase CPU/NB voltage too. Usually when things freeze it's a memory issue. If the other changes don't work you may need a bit more Dram voltage. I haven't read this hole thread sorry, make sure you have memory timings manually entered as well. What mobo is this? Bios looks like a CHIV.
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post #17 of 30
Thread Starter 
Quote:
Originally Posted by The Sandman View Post
It very well may NOT be the case and may load at 250MHz, I was just curious. Looking at your last bios pic I'd try raising HT Link Speed to 2000MHz and increase CPU/NB voltage too. Usually when things freeze it's a memory issue. If the other changes don't work you may need a bit more Dram voltage. I haven't read this hole thread sorry, make sure you have memory timings manually entered as well. What mobo is this? Bios looks like a CHIV.
ASUS M4A89GTD PRO/USB 3

Would raising the HT Link back to stock stabilize it? I lowered it cuz I found that I was only using about 1/3 of the 2000 MHz Band width at full load and I thought this would make it more stable?
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post #18 of 30
raise your RAM and/or CPU-NB voltages a little bit.
set HT Link @ 2000
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post #19 of 30
Thread Starter 
Quote:
Originally Posted by aesthetics1 View Post
You need more NB volts, and you need to move in small increments to find your stable limit. You can't just set a 250~ goal and demand your board achieve it.

Your best case is going to be the following:

1. Find your max stable FSB. I recommend getting your NB to 3000~ and your HT Link to 2400~ Start from your stock settings, and slowly move up, doing tests in prime95 every 5mhz increments or so until it's unstable. Once it's unstable, you can try pumping a bit more NB volts to 1.3 or 1.35~. Make sure your board has adequate VRM cooling.

2. Rinse and repeat until adding volts doesn't help, or you hit your thermal wall.

3. After you have done this, you can start inching up your multiplier and adding CPU vcore until it's unstable. Move multiplier up in 1x increments or .5x increments if your board allows. Keep going until you hit the temp wall.

Make sure everything you can set manually (ram timings, voltage, etc) is taken care of, and you disable Cool'n'quiet and other misc power saving/turbo functions in the bios.

Good luck!
Thanks for the guide I'll start looking at it. My VRMs are heatsinked with amazing airflow. NZXT Phantom with all optional fans installed. So what should be my max NB voltage on air?
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post #20 of 30
Thread Starter 
Quote:
Originally Posted by IOSEFINI View Post
raise your RAM and/or CPU-NB voltages a little bit.
set HT Link @ 2000
Done. any reason for HT Link @ 2GHz?
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