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Need Help Getting 1090T Stable @ 4.0

post #1 of 9
Thread Starter 
Hey all, I seem to be having an issue getting my 1090T stable at 4.0.

Currently I am running 3.9 @ 1.45v with a ratio of 18 and FSB of 220.

As soon as I up the multi to 18.5 or FSB to 223 (which gives me 4.0) windows will either crash on startup or I can't even run Prime for 5 minutes. Even with 1.5v on the CPU

My BIOS settings are as follows:

Ratio - 18
FSB - 220
RAM Freq - 1467
CPU/NB Freq - Auto (2200 according to CPUz)
HT Speed - Auto (2000 according to CPUz)
CPU Voltage - 1.45v
CPU/NB Voltage - 1.175v
RAM Voltage - 1.65v
HT Voltage - Auto

I am sure there is something other than the CPU voltage that is causing these quick crashes but I am not sure which setting to change.

Any advice would be appreciated.
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post #2 of 9
What is your LLC setting? Are you sure your ram is stable at that frequency? I would first get your cpu to a frequency and voltage that you know is stable, then put the ram at 1467 and test if it is stable. Before you assume it is the cpu, you must test your other components. I have had instability many times due to ram.
EDIT: you can use this tool for your ram testing purposes.
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post #3 of 9
Thread Starter 
CPU and CPU/NB LLC settings are both set to Auto at the moment.

Will go back to a stable CPU setting and test RAM for instabilities.
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post #4 of 9
I think i would have looked at "CPU/NB" and possible give it a raise on the volts. What are your NB at?
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post #5 of 9
Thread Starter 
I think I'm making some progress. Put the multi back down to 18 and bumped the FSB up to 222. This barely, and I mean barely, pushes me over 4.0 and raises my RAM to 1480.

Not sure why, but everything seems to be a lot more stable.

Running Prime right now and will report back with results.
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post #6 of 9
Is your 1090T a BE or a non BE? Are you able to OC with just multiplier instead of FSB?
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post #7 of 9
Thread Starter 
It is a black edition 1090T. So yes, I am able to overclock via just the multiplier.

That does bring up a question I have though. Which form of overclocking is generally better? I suppose I will have to try both types and see if I get better speeds on one or the other yes?
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post #8 of 9
FSB overclocking will generally overclock everything with a multiplier, e.g. PCI-E, RAM, CPU, HT, NB/CPUNB. An example is that I have my FSB set to 201 automatically, so my ram speed is 805MHz (DDR= double data rate) which means it is running at 1610MHz.
CPU Multiplier overclocking will use the FSB speed (default = 200) and multiply only the CPU speed. e.g. 20 (multiplier) x 200 (fsb) = 4000MHz for the CPU only, without affecting anything else.

So multiplier overclocking is generally better, because you won't damage anything else in your system as easily and it's quicker to pinpoint what caused system instability.
You should be able to get at least 3.9GHz from the multiplier without a voltage increase.
Edited by aidhanc - 8/18/13 at 12:53pm
post #9 of 9
Quote:
Originally Posted by aidhanc View Post

FSB overclocking will generally overclock everything with a multiplier, e.g. PCI-E, RAM, CPU, HT, NB/CPUNB. An example is that I have my FSB set to 201 automatically, so my ram speed is 805MHz (DDR= double data rate) which means it is running at 1610MHz.
CPU Multiplier overclocking will use the FSB speed (default = 200) and multiply only the CPU speed. e.g. 20 (multiplier) x 200 (fsb) = 4000MHz for the CPU only, without affecting anything else.

So multiplier overclocking is generally better, because you won't damage anything else in your system as easily and it's quicker to pinpoint what caused system instability.
You should be able to get at least 3.9GHz from the multiplier without a voltage increase.

^^ This

I would advise multiplier OC first, such that your RAM will run at its stock settings so you can find a stable OC for your chip before pushing the other elements such as NB and HT up. That was what I did with my 1090T.

Multiplier to 20 x 200FSB for 4Ghz
VCore at 1.488v
CPU/NB at 1.35v
NB at 2400Mhz
HT at 2400Mhz
CPU LLC at High
CPU/NB LLC at Auto
All power saving features off
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