A limiting factor. What?????
I was hitting 5.0ghz stable on quad cores a dice run and hitting 4.2ghz stable on a 1090T on air. It is on an Asus M4A89GTD PRO, which is the little brother of an Asus M4A89GTD PRO/USB3. The same mobo expect no USB 3.

 

Yeah, the board seems to be the limiting factor. My 1055T is multi-locked unlike your 1090T, so I rely solely on the board BCLK OC capability for max overclock.

How can I get the board higher than 295Mhz? Is there BIOS voltage tweak or something?

 

Quote:

Originally Posted by pswfps Yeah, the board seems to be the limiting factor. My 1055T is multi-locked unlike your 1090T, so I rely solely on the board BCLK OC capability for max overclock. How can I get the board higher than 295Mhz? Is there BIOS voltage tweak or something?

Your limiting factor is your ram. Mine can hit 320mhz with A-Data DDR3 2000 run @ 1600. Not all ram can run on high FB.

 

No, it's not the RAM, I lowered the multi so that it was running @ less than stock speeds for testing the mobo. Same for CPU, CPU/NB and HT Link. So must be the mobo that's limited to 295MHz. Mine will boot 320Mhz but isn't Prime stable for more than a minute .Just wondered if there was a BIOS tweak?

 

Quote:

Originally Posted by pswfps No, it's not the RAM, I lowered the multi to less than stock for testing the mobo.

The ram speed is not a factor. Is the FB on the ram.
Example
A-Data DDR3 2000 needs to be oc with 250mhz (FB) to hit the speed of 2000, so this ram has a better higher FB clock base. Your FB base is 200mhz.
The higher the FB base on the ram. The higher overall ocing you will get, because it can handle high FB speed.

 

No mate, I was running the RAM well below spec, like DDR3 1200Mhz on stock volts so it's rock solid.

 

Quote:

Originally Posted by pswfps No mate, I was running the RAM well below spec, like DDR3 1200Mhz on stock volts so it's rock solid.

You can try bumping up the ram voltage. I was stable at 320mhz. I ran prime95 for 6 hours. I was on bios version 601, which is the first bios.

 

REMEMBER
When you are changing the CPU FB. You are ocing the ram, because it is not design to run on anything besides FB of 200mhz.

 

Do you mean the RAM bus between the IMC and DRAMs? At DDR 1200, it's running at 600MHz regardless of the BCLK speed. Well within spec and safe.

 

I'm on a lter BIOS than you, maybe that's the problem.

 

Quote:

Originally Posted by pswfps I'm on a lter BIOS than you, maybe that's the problem.

No it is not the problem. You are limited by you ocing your ram. I'm running DDR3 1600 and I can't boot with the FB at 300mhz and I'm on bios 1006. I was stable with FB 320mhz before and after I update my bios to 1006 with DDR3 2000 clock at 1600. So I know that your ram is the problem. The average FB for your mobo is 310 stable.

 

My board has gone up to 340FSB bench stable and about 325-330MHz OS stable and it's the same as yours, so I don't think you've hitted a brick wall. Btw I'm running it 16/7 on a 313MHz FSB setup with no issues so far.

Also I've reached 4.42Ghz on suicide captures with my 125W 1055T on watercooling aswell, and that's with a relatively high ambient (around 28ºC).

I believe in cold winter (we're having 3-4ºC at 22pm here in spain) with windows wide open and room rads closed, the whole system can sit around 13-14ºC idle temps, great for some massive 4.6GHz clocks.

The board isn't limiting. Maybe your memory is?

 

Crikey, I said before I'm not OCing the RAM if it's running at DDR3 1200MHz!!
It's well under spec at that speed.

But thanks for your help anyway...

 

Quote:

Originally Posted by pswfps crikey, i said before i'm not ocing the ram if it's running at ddr3 1200mhz!! It's well under spec at that speed. But thanks for your help anyway...

Quote:

Originally Posted by dixson01974 remember when you are changing the cpu fb. You are ocing the ram, because it is not design to run on anything besides fb of 200mhz.

^^^^^^^this!!!!!!!!!!!!!!!

 

Oh okay. Lazy to read the whole thread, my fault then.

How are your NB and HT clocks? How cool is the chipset running?

 

Right, maybe this will make it clearer:

BCLK = 300Mhz
CPU = 2700Mhz (x9)
CPU/NB = 1800Mhz (x6)
HT Link = 1800Mhz (x6)
RAM = DDR3 1200Mhz ( x4)

Nothing but the board is overclocked here. Right?

 

Quote:

Originally Posted by pswfps Crikey, I said before I'm not OCing the RAM if it's running at DDR3 1200MHz!! It's well under spec at that speed. But thanks for your help anyway...

Lol I don't think he gets what your saying. How high have you gone on the vcore? My 1055t seems to need much more voltage after 3.8ghz. Most of these chips need a decent amount of voltage to do 4ghz and beyond.

Some as high as 1.5v and up.

 

How cool is the chipset running?[\\quote]
Ah, good question. I can check that in HW Monitor under "Mainboard" temp?

 

BCLK = 300Mhz
^^^^^THIS
Your ram is design to run at BCLK 200 , NOT BCLK of 300, so you are ocing the ram base not the speed. The speed or BCLK or timing has everything to do with ocing ram. If you change one you are ocing the ram.

 

I think you can. I use an external sensor from my NZXT LeXa and it never goes above 42ºC under heavy load.

Well it went up to 50ish when I passed a round of tests at 333MHz base clock.

Btw, what dixson said is completely true. Try to set memory onto Ganged mode, it helps overclocking sometimes.

 

Quote:

Originally Posted by Artikbot Try to set memory onto Ganged mode, it helps overclocking sometimes.

This only works with 4 sticks.

 

Quote:

Originally Posted by dixson01974 This only works with 4 sticks.

D'oh.

It helped my MNH-E Hyper-based HyperX's to reach 1666 rock solid on CL6-7-6-21.

But it killed a bit the performance on multithreaded apps, so I ended up lowering to 1600.

 

The bottom line is. You need to get better ram.

 

That's the best idea on the thread lol.

 

Quote:

Originally Posted by Artikbot That's the best idea on the thread lol.