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[AMD X6 1090T] Need help stabilizing CPU

post #1 of 9
Thread Starter 
Hello. Few days ago i decided to OC my AMD x6 1090T 3.2 Ghz to 3.9 or 4.0Ghz to gain some fps boost for Planetside 2 mainly. (OC for gaming!! )

- Cpu: AMD X6 1090T
- Mobo: Asus M4A78LT-M (4+1 , no mosfet heatsinks)
- Cooling: Arctic Freezer 7 Rev.2 Pro + 2 random 12v air coolers cooling cpu from sides
- PSU: Power LC6420 420W (had an corsair 600W but it died)

Atm no budget for anything new :/

I OCed in mobo bios!! I am using CPUID HWMonitor and CPU-Z to monitor temps and clock.

-CnQ off
-C1E disabled
-Turbo disabled after 3.9 OC (3.4 to 3.8 Ghz i had it on)
-Loadline calibration set to 0% at 3.9Ghz
-HW max from 55C to 51C (cant remember the full bios name)


1. I did run some tests in prime 95 with the stock 3.2 Ghz and in idle i got 27C while in full prime 95 load ( 100% all 6 cores) i got 52C.

2. OC to 3.4 GHz and changed only the Multiplier ( 200 x 17 ) and in idle i got 28C, in prime 95 at full load i got 54C.

3. OC to 3.5 Ghz (200 x 17.5) (everything else to auto) and in idle i got 28-29C, prime95 full load 56C.

4. OC to 3.6 GHz (200 x 18) (everything else to auto) and in idle i got 28-29C, prime95 full load 58C.

5. OC to 3.7Ghz (200x 18.5) (everything else to auto) and in idle i got 28-29C, prime95 full load 61C.

6. OC to 3.8 Ghz (200x 19) (everything else to auto). installed 2 extra air coolers around cpu and in idle i got 27-28C, prime95 full load 62-64C.

7. OC to 3.9 Ghz (200x 19.5) (everything else to auto expect i disabled turbo mode and set loadline calibration to 0%. idle 27-28C, prime95 full load it went after 1 min to 69C and i just stoped the workers and didnt try it again. I didnt downclock it yet. I still have it 3.9Ghz from yesterday and i didnt get a single crash or blue screen. (been playing Planetside 2 12 hours straight now literally)

I even tried 4.0Ghz for fun but i got blue screen after 20 mins (no prime95 test) so it downclocked to 3.9ghz.



Some numbers i have to point out at 3.9Ghz:

- I have 27-28C at idle (went to 22C this morning when i booted the pc but 27-28C is what i get between i afk from pc)
-When i play Planetside 2 the temperature it reached was 52C and that was just for 3-5 mins (really a huge fight 96v96) the avarage is 47C.
-i didnt had any crashes but i am afraid of the prime95 test at full load as the temp will rise above 72C for sure and i dont want to kill my pcu.


Questions:

- Should i downcloack to 3.6 - 3.8 Ghz just becouse of prme95 test?
- Is my CPU stable at 3.9 ghz ?
- Should i be worried and am i killing my cpu and mobo ?


So again i OCed for gaming (Planetside 2) to gain fps. If i have to downcloack how much fps i am loosing?

Thanks for the answers a million times!
post #2 of 9
For PlanetSide2, you could disable 2 cores in bios or windows boot settings (I forgot where that was but should be easy to figure out) and get lower temps. because the game uses 3 cores max, so then you would not lose FPS.
If you downclock, you will lose FPS corresponding to the amount you clock down, in high player count situations (or whenever the FPS counter says CPU under the fps number). Going from 3.9 to 3.6 would be 8.3% less fps. Not the end of the world, either.


The CPU might be stable as it is, but you cannot test for that because of temps. Some games that use all 6 cores might give you too high temps as well. (if you ever try warframe, for example. It uses all cores for loading stages/characters to the max. but only 1 core for the gameplay itself.) It's recommended to stay at or under 60 as far as I remember.

edit: also I heard these chips benefit from overclocking CPU-NB, but never did any testing myself in that regard. Might get you some FPS as well. But I honestly don't know.
Edited by Tivan - 1/10/15 at 10:22am
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post #3 of 9
Thread Starter 
Will do some research regarding locking 2 cores as i dont know how to do it. It is even possible on my motherboard or it doesnt matter?

Going to try cpu-nb overclocking and let u know.

If someone know a good guide let me know!
post #4 of 9
http://solidlystated.com/software/how-to-disable-a-cpu-core/

ok found a quick guide for you on how to do it for windows. If you do it like that, then windows will not see or use the extra cores/they aren't visible to software either. Might be good enough, if you can't disable in bios.

edit: also I think upping the HT link speed to match CPU-NB was part of the recommendation for the chip. (or might depend on board) But you should probably check out a guide in the section as well! c;
Edited by Tivan - 1/10/15 at 5:40pm
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post #5 of 9
Thread Starter 
Hey Tivian and thanks for all the help so far biggrin.gif i really do appriciate it :>

I downclocked to 3.8 ghz and i tried to test prime95 with 6 cores and i kinda stabilized it. i was getting 61C on full load. Something i saw happening. TPD was switching from 133 to 95 for a sec every few seconds. while it was doing that the temperature droped to 55C and then raised again to 61C. Was doing that all the time after 3 mins in prime. Should i be worried? i dont think i will ever hit 100% load. but still should i be worried?

I googled around and found how got to clock cores in bios. locked 2 cores. so i got 4. OC to 4.1 Ghz was fine 54C max full load. Tried 3 cores as u suggested me and with 4.2 Ghz. and got a blue screen (didnt prime) tring to boot Planetside 2 (i was confident it should be ok as less cores u have less heat u get.) and i got a blue screen of death. Tried 4 cores again when windows loaded i couldnt see the core temperatures in hw monitor neither in other programs.

1 thought that came to my mind was that maybe some core is damaged or smth coz i bought a used 1090T and when i installed it i saw that 3 pins were kinda sideways. It was barely noticiable but i saw it coz i looked really closely. So the blue screens i got while OCing might be coz of the 3 pins or coz of a core damaged maybe ?


I am thinking out loud i know tongue.gif
post #6 of 9
Thread Starter 
just saw that u have a HD 7770. mine is asus. I maneged to OC it to 1140 Mhz Clock speed (core) and 1150 memory speed. its stable!!! give it a try. smile.gif
post #7 of 9
Thread Starter 
forgot to write how i maneged to "stabilizate" to 3.8ghz.

multiplier is 19x, loadline calibration i set to 51%. every thing else to auto. I might try tomorow again 3.9 ghz as i didnt do it with 51% loadline calibration.

Please let me know if the throtle is ok or not. wink.gif
post #8 of 9
Two things.....

I would set LLC between 0 and 21% (learned this dealing with my son's Asus board).

Also, you can change the voltage on your 7770 with Asus GPU Tweak if you find the right version. There are 3 or 4 versions some time back, that offered voltage changing on the Asus 7770's, just do a little research.

I used to have one in my wife's system, and it clocked to 1250/1400 with the voltage cranked up. thumb.gif
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post #9 of 9
Thread Starter 
Uped back to 3.9 Ghz biggrin.gif after almost 1 day of trying hard. it seems stable but the throttle in prime95 :/ i know i will never stress it like prime do so i am not worried that much. i will still keep looking for a sulution.

- multiplier: 19 x 200
- LLC: 29% (if i set it higher i get blue screen in prime95)
- CPU-NB : 12x (2400 mhz)
- everything else set to auto (well i guess it works)

I will try to put cpu-nb to 2600 mhz but i need to do a research about it as i might get more heat.

Might try an attempt for 4.0 Ghz again, will see.
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