(4.6) My 2500k, GB GA-Z68MA-D2H-B3 overclocking tales

[Puppies04]

My attempts at raising the BCLK all ended in failure, and, after researching exactly what BCLK controls, decided a 100.2MHz BCLK was best in the long run.... that's why I was asking the OP what his was set at; I don't think this board handles a higher BCLK well.

I have 2 CPU fans on the 212+ and 2x 200mm/2x 120mm case fans... there is no problem with airflow in my case... My problem is CPU heat... as vCore went up, so did the temps.

No SB chips handle BCLK OCs very well, they aren't designed to be overclocked that way hence my last post. You shouldn't be seeing those temps with that cooling setup unless your room is super hot. Are you sure your CPU cooler is fixed properly and it has TIM applied?

CPU heat will go up as you raise vcore but you should be able to hit 1.35v without getting too hot. Mine is just over 1.35 and hits somewhere in the high 70s on its hottest core during an extended IBT run.

 

[schott1984]

Did you do anything to your BCLK speed?

What are your C-states set at?

Passed 8hrs p95 at 45 multi and DVID = -0.07.

C-states are auto.

In RealTemp, it shows my BCLK being 100.3 (I have it set to auto in BIOS). So I went and enabled modification of this and set it to 1000 (100.0). Now RealTemp says 99.77x45 at load.

What's up with that?

 

[Charlie98]

Passed 8hrs p95 at 45 multi and DVID = -0.07.

C-states are auto.

In RealTemp, it shows my BCLK being 100.3 (I have it set to auto in BIOS). So I went and enabled modification of this and set it to 1000 (100.0). Now RealTemp says 99.77x45 at load.

What's up with that?

That's why I set mine at 100.2... so it would round out at 100MHz in actuality. I don't know why there is a disparity, system inefficiency I guess.

Try disabling your C3/C6 states, seriously. I ran an ATTO test on my SSD and that was choking it down:

 

[Charlie98]

You shouldn't be seeing those temps with that cooling setup unless your room is super hot. Are you sure your CPU cooler is fixed properly and it has TIM applied? .

I pulled the 212+ off and reapplied TIM (OEM CM supplied with cooler) just 2 weeks ago, and added the 2nd fan. I recently bought a tube of Artic Silver, just for giggles I may run a LinX test on the current setup, reapply the AS5 and try it again. I'm thinking I just got a hot processor, though, in reality. Nothing I've tried has dropped the heat to a tolerable level at 1.35v (besides running the multiplier at 38x or lower.) I would get Chernobyl at 4.6GHz and 1.35v

 

[MadScientist]

Passed 8hrs p95 at 45 multi and DVID = -0.07.

C-states are auto.

In RealTemp, it shows my BCLK being 100.3 (I have it set to auto in BIOS). So I went and enabled modification of this and set it to 1000 (100.0). Now RealTemp says 99.77x45 at load.

What's up with that?

Disable Spread Spectrum. This will set it back to 100.0. If your MB is like mine, by default, it sets the BCLK to 99.7.

 

[MadScientist]

I pulled the 212+ off and reapplied TIM (OEM CM supplied with cooler) just 2 weeks ago, and added the 2nd fan. I recently bought a tube of Artic Silver, just for giggles I may run a LinX test on the current setup, reapply the AS5 and try it again. I'm thinking I just got a hot processor, though, in reality. Nothing I've tried has dropped the heat to a tolerable level at 1.35v (besides running the multiplier at 38x or lower.) I would get Chernobyl at 4.6GHz and 1.35v

I was using a CM 212+ and at 1.35V was getting temps in the low 70s with Intel Burn Test, ram set at max. Try applying your TIM using this method: http://benchmarkreviews.com/index.php?option=com_content&task=view&id=170&Itemid=1&limit=1&limitstart=5

You have to first fill in the channels between the heat pipes.

 

[Charlie98]

You have to first fill in the channels between the heat pipes.

Been there, done that....

 

[schott1984]

I was using a CM 212+ and at 1.35V was getting temps in the low 70s with Intel Burn Test, ram set at max.

At what ambient? I've re-applied this stuff three times now...

 

[Kenmitch]

I pulled the 212+ off and reapplied TIM (OEM CM supplied with cooler) just 2 weeks ago, and added the 2nd fan. I recently bought a tube of Artic Silver, just for giggles I may run a LinX test on the current setup, reapply the AS5 and try it again. I'm thinking I just got a hot processor, though, in reality. Nothing I've tried has dropped the heat to a tolerable level at 1.35v (besides running the multiplier at 38x or lower.) I would get Chernobyl at 4.6GHz and 1.35v

Guess you found out that the frequency also plays a big part in temperatures under load along with vcore.

The closest I've come to Chernobyl was at 5.2ghz! Hit 87*C on 2 cores

 

[MadScientist]

At what ambient? I've re-applied this stuff three times now...

Ambient temp: 20-21C, winter thermostat setting. I ran the 212+ with 2 fans at 100% in a push/pull config, used TIM Consultants Quantum TIM. It's cheap and spreads easily. http://www.thermal-grease.com/index.php?option=com_content&view=article&id=11&Itemid=18

I'm currently using a Corsair A70. Got it on sale at NE for $23. AR shipped. It's now available for $24.99 AR shipped: http://www.newegg.com/Product/Product.aspx?Item=N82E16835181011 It has direct contact heat pipes like the 212+ but they are larger, 8mm vs. 6mm, and the spaces between them are less than the 212+. It has a more secure mounting bracket. It doesn't move like the 212+. Load temps are also better.

Ran this today, ambient temp 21C:

I've got an older Lian Li aluminum case with 2-120mm fans (1 front, 1 rear) running at 1500rpm, a top mounted 135mm PSU fan at 1600rpm, the GPU fan at 1300rpm, and the 2-120mm A70 fans at 2000rpm. That's it, no exotic case cooling.

My CPU though hits a wall at 4.6Ghz. No amount of additional voltage or bios tweaks will get it stable at 4.7Ghz.