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A tip for Oc'ing the 1055T and 1090T - Page 2

post #11 of 28
1055s don't overclock as nice as the 1090s I see I have my 1090 @ 4GHz right now and I'm barely breaking 40c when priming (large FFTs).
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post #12 of 28
Anyone know how to stop the 1055t from throttling it self down during priming?

Its throttles down from 4ghz to 2.1ghz when the CPU hits 57c or 55c... the cores sit at 43c

The Vcore max is 1.47

Mobo is M4A78TD-V EVO

Im using the H50 with a antec tricool at 2000rpm

Ive searched the bios and have already turned off cool and quiet and AMD turbo


Thanks
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post #13 of 28
AMD Phenom II's are speceed to go up to 76C according to the last "inside" informational release. They just don't want you going to high, damaging your chip, and having to pay for a mistake that you did. Believe me, if a Phenom II can go all the way down to -260C, then it can sure as hell get to 70C .
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post #14 of 28
Quote:
Originally Posted by bulabone View Post
Anyone know how to stop the 1055t from throttling it self down during priming?

Its throttles down from 4ghz to 2.1ghz when the CPU hits 57c or 55c... the cores sit at 43c

The Vcore max is 1.47

Mobo is M4A78TD-V EVO

Im using the H50 with a antec tricool at 2000rpm

Ive searched the bios and have already turned off cool and quiet and AMD turbo


Thanks
1.47 is probably too low of a VCore. At least 1.5 for a 1055T. Also, 57C is pretty cool for a 4GHz X6. Again, I seriously think it's not getting enough voltage. When my CPU throttles at 64C, it just crashes the application that's making all the trouble
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post #15 of 28
Quote:
Originally Posted by Raven Dizzle View Post
1055s don't overclock as nice as the 1090s I see I have my 1090 @ 4GHz right now and I'm barely breaking 40c when priming (large FFTs).
outside of the ease of the unlocked multiplier your argument is moot, ive seen 1090s hit 4.0+ and ive seen 1055s go just as high
    
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post #16 of 28
Quote:
Originally Posted by AMDZ View Post
1.47 is probably too low of a VCore. At least 1.5 for a 1055T. Also, 57C is pretty cool for a 4GHz X6. Again, I seriously think it's not getting enough voltage. When my CPU throttles at 64C, it just crashes the application that's making all the trouble

Tried 1.5 and 1.55... still throttles as soon as it hits 57c.

and another thing....even though i have cool and quite off, the CPU still runs at 1120ghz with a multiplier of 4 when idle.

ive checked my windows 7 x64 power settings.... all seems good.

Im thinking its my mobo's compatability with the 1055t
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post #17 of 28
Quote:
Originally Posted by bulabone View Post
Tried 1.5 and 1.55... still throttles as soon as it hits 57c.

and another thing....even though i have cool and quite off, the CPU still runs at 1120ghz with a multiplier of 4 when idle.

ive checked my windows 7 x64 power settings.... all seems good.

Im thinking its my mobo's compatability with the 1055t
I had very similar issues on my 1055T + M4A77TD Pro. Difference is it 'steps down' at 48C levels.

I used PhenomMSRTweaker to manually adjust the P3 state and now it doesn't do that anymore. Now running into an issue where whole box shuts down when it hits 58C.

Update:
I think I understand how this works now..

Basically the mobo switches the CPU P-states when the MOSFETs gets too hot (so not actually directly related to CPU temp). First it goes to P3 state at a certain threshold (non adjustable), then if it gets even hotter above yet a higher threshold it just shuts down the system completely.

What I did to test is to put a small 60mm fan directly over the MOSFETs. Now the mobo doesn't even switch to P3 state at high CPU temps. I think its advisable to grab some MOSFET heatsinks !!

My 1055T is now running Prime95 stable at 4.15Ghz @ 1.49 vcore. CPU temp reading 57C at load (Noctua heatsink on 1,200 rpms).

This might explain why Asus boards don't generally suffer from overclocking deaths unlike Gigabyte/Biostar.
Edited by Thrawn777 - 6/20/10 at 11:14am
post #18 of 28
Quote:
Originally Posted by Thrawn777 View Post
I had very similar issues on my 1055T + M4A77TD Pro. Difference is it 'steps down' at 48C levels.

I used PhenomMSRTweaker to manually adjust the P3 state and now it doesn't do that anymore. Now running into an issue where whole box shuts down when it hits 58C.

Update:
I think I understand how this works now..

Basically the mobo switches the CPU P-states when the MOSFETs gets too hot (so not actually directly related to CPU temp). First it goes to P3 state at a certain threshold (non adjustable), then if it gets even hotter above yet a higher threshold it just shuts down the system completely.

What I did to test is to put a small 60mm fan directly over the MOSFETs. Now the mobo doesn't even switch to P3 state at high CPU temps. I think its advisable to grab some MOSFET heatsinks !!

My 1055T is now running Prime95 stable at 4.15Ghz @ 1.49 vcore. CPU temp reading 57C at load (Noctua heatsink on 1,200 rpms).

This might explain why Asus boards don't generally suffer from overclocking deaths unlike Gigabyte/Biostar.
Ahhhh ok that makes sense....I guess it doesnt help that my H50 radiator is right there blowing hot air on it...LOL

And it seems to be throttling down faster since i just got my HAF X....it seemed to only throttle when i hit 65c in my antec 900... any recommendations for good MOSFET heatsinks?
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post #19 of 28
Quote:
Originally Posted by AMDZ View Post
AMD Phenom II's are speceed to go up to 76C according to the last "inside" informational release. They just don't want you going to high, damaging your chip, and having to pay for a mistake that you did. Believe me, if a Phenom II can go all the way down to -260C, then it can sure as hell get to 70C .
no...it wont handle 70c...its gonna blue screen or black screen when it gets pass 62c just a bit. good rule of the thumb...is dont let it exceed over 55c to be safe...on full load. amd cpu like its cold with less volts.
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post #20 of 28
Quote:
Originally Posted by bulabone View Post
Ahhhh ok that makes sense....I guess it doesnt help that my H50 radiator is right there blowing hot air on it...LOL

And it seems to be throttling down faster since i just got my HAF X....it seemed to only throttle when i hit 65c in my antec 900... any recommendations for good MOSFET heatsinks?
Looking at pictures of M4A785TD-V EVO, it has heatsinks already.. So your best best is probably mounting a small fan somewhere to blow cool air on it.

My board M4A77TD Pro doesn't have heatsinks at all...
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