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post #111 of 5036
Quote:
Originally Posted by test tube View Post
Yes. To hit 2.8Ghz-3.0Ghz you need 1.35v-1.45v it seems like. Not that I saw any real performance increase by making it higher.

You can go up to 1.45v I would say, though some people will crank it even higher.

I haven't needed to play with the NB voltage at all yet for stability, so I don't know.
You had to see ram read/Write speeds increase with Nb overclock.
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post #112 of 5036
Quote:
Originally Posted by test tube View Post
Yes. To hit 2.8Ghz-3.0Ghz you need 1.35v-1.45v it seems like. Not that I saw any real performance increase by making it higher.

You can go up to 1.45v I would say, though some people will crank it even higher.

I haven't needed to play with the NB voltage at all yet for stability, so I don't know.
hmm the thing is i already need about 1.35-1.4v CPU-NB (still testing) to be stable @3.8ghz with the NB @~2000mhz and each 100mhz on the cpu clock i need to raise the CPU-NB even further...
so lets say i want to get 4ghz stable i would probably need ~1.5v CPU-NB and that wont let much room for a NB clock increase since as far as i know i will need about 0.1V for a 200mhz increase:O
and according to this table (cant find the link anymore where it was tested)
a ~2500mhz NB clock would be the sweet spot which would need ~0.25V increase on the CPU-NB which would end up @ 1.75V and that seems way to much:O
maybe its all a bit buggy because of the beta bios which really messes up some things
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post #113 of 5036
Quote:
Originally Posted by kromar View Post
hmm the thing is i already need about 1.35-1.4v CPU-NB (still testing) to be stable @3.8ghz with the NB @~2000mhz and each 100mhz on the cpu clock i need to raise the CPU-NB even further...
so lets say i want to get 4ghz stable i would probably need ~1.5v CPU-NB and that wont let much room for a NB clock increase since as far as i know i will need about 0.1V for a 200mhz increase:O
and according to this table (cant find the link anymore where it was tested)
a ~2500mhz NB clock would be the sweet spot which would need ~0.25V increase on the CPU-NB which would end up @ 1.75V and that seems way to much:O
maybe its all a bit buggy because of the beta bios which really messes up some things
That is pretty much what I did. i set my cpu-nb to 1.55v. 1.75 is to hi for air cooling.
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post #114 of 5036
Quote:
Originally Posted by jj775 View Post
That is pretty much what I did. i set my cpu-nb to 1.55v. 1.75 is to hi for air cooling.
so your running with these settings?
4ghz@ 14x 286
vcore: 1.5v
CPU-NB: 1.55v@2.86ghz
RAM: 1524mhz

what memory timings do you have and did you need to increase your Vdimm at all?
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post #115 of 5036
Quote:
Originally Posted by kromar View Post
so your running with these settings?
4ghz@ 14x 286
vcore: 1.5v
CPU-NB: 1.55v@2.86ghz
RAM: 1524mhz

what memory timings do you have and did you need to increase your Vdimm at all?
Well both our rams are different, you would have to test what timings work for you. i increased my ram volts to 1.75 from 1.65 stock. I am running 9-9-9-24. Your ram seems better than mine though. You should get better results.
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post #116 of 5036
Quote:
Originally Posted by jj775 View Post
Well both our rams are different, you would have to test what timings work for you. i increased my ram volts to 1.75 from 1.65 stock. I am running 9-9-9-24. Your ram seems better than mine though. You should get better results.
well the strange thing is that my ram is rated as 1600mhz@1.65v yet i need to increase the voltage to 1.75-1.8 (still testing) to get it stable @1524mhz o_O

whats the frequency your ram is rated @1.65v? 1333?
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post #117 of 5036
Hmm seems quite a few including myself have had issue with getting decent timings with a Giagbyte mobo when overclocking this chip. I had to loosen mine up to 9-9-9-27 just to get past 3.5ghz. Running 1.690v

I had to drop the multiplier to 4x because 5.33x wouldn't successfully boot Win7 after 3.7ghz.

I have also tried adjusting the NB and HT multipliers down to 8 to drop their speed a bit to try and boost my CPU clock further, but instantly things get screwed. May have to wait out a BIOS update before going further.

Seems some ASUS mobo users have reached 4ghz without much fuss, any owners out there that can confirm this, or their experience with the ASUS bios/board.
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post #118 of 5036
Well as soon as i find away to flash my bios without a cpu ill be able to run my new 1055T setup.
post #119 of 5036
Quote:
Originally Posted by Biermann View Post
Hmm seems quite a few including myself have had issue with getting decent timings with a Giagbyte mobo when overclocking this chip. I had to loosen mine up to 9-9-9-27 just to get past 3.5ghz. Running 1.690v

I had to drop the multiplier to 4x because 5.33x wouldn't successfully boot Win7 after 3.7ghz.

I have also tried adjusting the NB and HT multipliers down to 8 to drop their speed a bit to try and boost my CPU clock further, but instantly things get screwed. May have to wait out a BIOS update before going further.

Seems some ASUS mobo users have reached 4ghz without much fuss, any owners out there that can confirm this, or their experience with the ASUS bios/board.
at least you can set your ram multi down to 4, mine gets set back to 5.33 when i try to do so^^
i have given quite some test reports about the bios problems in the gigabyte forum and hope they will submit them to the software engineers and we get a decent bios soon:O
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post #120 of 5036
Quote:
Originally Posted by awdrifter View Post
Just curious, has anyone been able to force the Turbo Core multi on the 1055T with all 6 cores loaded? It looks like the CPU can do 4.2ghz if not for the HTT bus limit, has anyone tried ocing with the CnQ on? The Turbo Core mode should give the cores 16.5x multi for the 1055T, so with 257 HTT, it should hit 4.2ghz in Turbo Core mode.
Yep I tried this when first screwing around with AMD OD, trying to see if I could successfully change #of cores boosted to 5. However the interaction between the board and the software is quite poor. Many options are not blacked out but if you change them they just reset to default when you try to apply. Overall things were very wonky and untrustworthy because my voltage settings etc. in the BIOS are not updated in AMD OD so you have to reset them to equal values. But sometimes I would get a crash just by applying the same settings as I had successfully stress tested set from the BIOS.

Anyhow after screwing with it long enough I was able to get it run with a 256x multi and was getting 5x 4.2ghz cores boosting though it technically should have been locked to 3. One core was rotating at a lower base multi and the other's would all be 4.2ghz. I tried Cinebench CPU single core, but again I was seeing core hand-offs and weird stuff that ultimately gave no usable results. Even though I have C1E, CNQ, etc all disabled, the board will still occasionally drop 1 or 2 cores to 4x (1.xx ghz) when idling or running light usage. Hopefully Giga will be fast on a BIOS update that will resolve these problems.
Edited by Biermann - 5/9/10 at 1:20pm
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