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AMD FX (Bulldozer) Owners Club! - Page 255

post #2541 of 8112
I was able to get my Corsair Dominator GT 1866 (9-10-9-27) 2 x 4GB Rams Stick up to 2200Mhz (10-11-10-29) with my 8120...

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post #2542 of 8112
If only I could get my newly bought Corsair XMS3 2x4GHz 2000MHz to run above 1033MHz... I get overclocking failure when I exit the BIOS.mad.gif Guess they don't like my motherboard, or the other way around.
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post #2543 of 8112
Quote:
Originally Posted by kzone75 View Post

If only I could get my newly bought Corsair XMS3 2x4GHz 2000MHz to run above 1033MHz... I get overclocking failure when I exit the BIOS.mad.gif Guess they don't like my motherboard, or the other way around.

Not insulting you intelligence or anything but you are aware that 1033=2066mhz. Im sure you know but from your post I took it as you are thinking its way under the specs. But OTOH, what are the default timings for the 2000mhz in spd table on cpuz? if they are something like 10-10-10-28 try 10-11-10-30 or something (just example most likely not even close lol) and manually set the voltage to just above stock.

Edit: Mike, thats an awesome memory speed bro for your stock 1866 ram. When I quit sitting on my wallet and break down and buy an fx cpu (come on 8170) I might fork out some extra for 2133mhz cl9 ram. Maybe jsut for epeen but who cares. I dont game (bf3 occasionally) just like to overclock and tweak and bench etc... thats reason enough to spend the extra dough right?
Edited by dstoler - 1/2/12 at 7:08pm
    
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post #2544 of 8112
Quote:
Originally Posted by dstoler View Post


Not insulting you intelligence or anything but you are aware that 1033=2066mhz. Im sure you know but from your post I took it as you are thinking its way under the specs. But OTOH, what are the default timings for the 2000mhz in spd table on cpuz? if they are something like 10-10-10-28 try 10-11-10-30 or something (just example most likely not even close lol) and manually set the voltage to just above stock.

Intelligence=>insulted. smile.gif DRAM frequency in CPU-Z showed 516.5 MHz. Timings for 2000MHz are 9-10-9-27. Voltage was set higher than stock. And I am not sure how high can go on the voltage.
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post #2545 of 8112
Quote:
Originally Posted by kzone75 View Post

If only I could get my newly bought Corsair XMS3 2x4GHz 2000MHz to run above 1033MHz... I get overclocking failure when I exit the BIOS.mad.gif Guess they don't like my motherboard, or the other way around.

Are you using the ram divider settings in the bios or just overclocking the base clock?
post #2546 of 8112
Tried both. It resets itself to 1033MHz right away when I reboot. The XMS3 4X2GHz 1600MHz runs perfectly fine though.
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post #2547 of 8112
Quote:
Originally Posted by kzone75 View Post

Tried both. It resets itself to 1033MHz right away when I reboot. The XMS3 4X2GHz 1600MHz runs perfectly fine though.

You should be able to get to 1866Mhz no problem. Even if your ram is rated lower than that you should be able to losen timings and set ram speed at 1866Mhz
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post #2548 of 8112
You may have to set every timing value by hand. I have to on most of my boards when the memory is XMP or uses out of spec bus speeds (esp when FSB overclocking).
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post #2549 of 8112
Quote:
Originally Posted by rrohbeck View Post

[Citation needed].
From http://support.amd.com/us/Processor_TechDocs/41256.pdf : "2.10.1 The Tctl Temperature Scale
Tctl is the processor temperature control value, used by the platform to control its cooling systems. Tctl is accessible through SB-TSI and F3xA4[CurTmp]. Tctl is a non-physical temperature on an arbitrary scale measured in degrees. It does not represent an actual physical temperature like die or case temperature. Instead, it specifies the processor temperature relative to the point at which the system must supply the maximum cooling for the processor’s specified maximum case temperature and maximum thermal power dissipation. It is defined as follows for all parts:
For Tctl = 0 to Tctl_max - 0.125: the temperature of the part is [Tctl_max - Tctl] degrees under the temperature for which maximum cooling is required"
This clearly states that the real die temperature is offset by some amount from core temp (Tctl), the value that is displayed by HW monitoring tools. Tctl_max=70 (see below.) "The temperature for which maximum cooling is required" is unknown but since Tctl reads in the low teens at idle with normal ambient temperatures, when the motherboard sensor reads 30-ish C, it can be inferred that the delta is around 20C. That is consistent with Intel's max temps in the 90s.
Further down, "The default value of the HTC temperature threshold (Tctl_max) is specified in the Power and Thermal Datasheet."
From that datasheet (http://support.amd.com/us/Processor_TechDocs/43375.pdf):
"2. Tctl Max (maximum control temperature) is a non-physical temperature on an arbitrary scale that can be used for system thermal management policies. Refer to the BIOS and Kernel Developer’s Guide (BKDG) for AMD Family 10h Processors, order# 31116."
and then it says "Tctl Max 70 oC" for every CPU in the table.
So, max core temp is *always* 70 for AMD CPUs. That value of 70 does not mean your CPU is about to melt, it's the temperature at which maximum cooling is requested, i.e. a normal operating temperature.
AMD has also stated that the family 15h temperature sensor is identical to family 10h so the above applies to Bulldozer as well as the earlier CPUs although the datasheets have not been updated for Bulldozer yet.


Thanks for that. But why cant a software be written to take this "arbitrary scale" into accoutn and project the real temperatures that a user may want to see.

I think on an Intel chip, actual temps can be seen, rather than an arbitrary number that may or may not be your temps as you are using it.

Also when we say 70 degrees, does that mean that all temps are arbitrary till 70 degrees?
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post #2550 of 8112
Because the sensor reading is different in every chip, thus it is merely calibrated to 0 and 70 (min/max respectively). This is due to how the sensor operates and inconsistencies in silicon process tech. Therefore it is a non-real value on an arbitrary scale.

Im fairly certain nearly all silicon substrate thermocouples work like this.
Edited by KarathKasun - 1/2/12 at 10:45pm
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