Overclocking 1055T on a 990FXA-UD5

[rooie]

I am coming from  an Asus M4A89TD Pro/USB3 and it was very easy to overclock the 1055T to 3900mhz, just raised the FSB to 300mhz, lowered the multiplier to 13, raised the Vcore to 1.3975 and voila, all was done!

The 990FXA-UD5 is something else
Whatever i try i can not exceed 3500mhz
Yes i have read the topic on the 1090T but it will not work for me.
Even raised the Vcore to 1.650 volts without any succes!
I am using beta bios F5B, still the vdroop is terrible and has tried F5C without any luck.

Who?

[absic]

Hi there,

I sympathise with your findings and can not really explain what is happening with your system. Sadly I don't have access to your CPU and so am unable to do any testing on your behalf.

As the F5c BIOS is a beta version there maybe an issue with that and it might be worthwhile trying the F4 BIOS to see if that helps. If there is still no improvement then I would recommend that you contact Technical Support here: http://ggts.gigabyte.com/tech.asp?ClassID=2&Country=Holland&SourceWeb=B2C as they maybe in a better postion to do some tests and advise you better.

[rooie]

Thanks!

[rooie]

Has asked for technical support, will let you know the outcome.

[Lordred]

rooie I have a 1055T lieing around that I can pop in. However I already know that my 1055T is only good for 4.2ghz @ 1.54v.

I'll tell you what I'll do. I'll set my 1100T multi to x14 and do a FSB only OC up to 4ghz and let you know which settings I used. Then we can see if you can match that. (I'll photograph the bios settings I'll use for you) be back in a bit.

~Red

[Lordred]

Ok rooie!

I did some playing with my Thuban locked to an X14 multi (did not feel like doing the CPU swap, sorry )

Here are the bios settings I used.

Now mind you this is with my CPU cooled by air using a Zalman 9900Max, so you should be more then able to do this as you are under water on your CPU.






Quick stability check in windows.
Voltage drop under load.


Cool and Quiet doing its job once the load is gone.



I hope this is helpful rooie.

[rooie]

THANKS!!!!!!

I am now for lunch at home, as soon i am finished working i will try your settings.

And yes, an 1055T IS an 1090T which is being rated/tested/lower, i know, so the settings must be no problem.

[rooie]

I am at home now and system is for the first time running an test.

Seems to me that i had two faulty settings:
Northbridge: i had set it equal as HT, tried to hold both around 2000mhz.
Cpu voltage, i didn't had the guts to raise it above 1.65 - it is now according to your specs 1.675 and idle 1.63 according to HWmonitor, what an Vdroop!
Cpu voltage, 1.63 idle isn't to much i guess?

Well, the first test Everest/Aida.
If the cpu usage do not drops for 10 minutes then it is an sign the oc is good.......

Time to fire up Prime95, fingers crossed........

[absic]

Whoa!

You're looking at the DRAM Voltage of 1.675 not the CPU Voltage which is 1.4750V. You have the CPU voltage set a little bit too high I think. 

[rooie]

Whoa!

You're looking at the DRAM Voltage of 1.675 not the CPU Voltage which is 1.4750V. You have the CPU voltage set a little bit too high I think. 

Yes, i have noticed that, allready lowered the voltage, temps where mucht to high - tests running....

[Lordred]

Whoa!

You're looking at the DRAM Voltage of 1.675 not the CPU Voltage which is 1.4750V. You have the CPU voltage set a little bit too high I think.  

My DRAM moduels call for an opperational voltage of 1.65v, If you notice in the PC_health tab when set to 1.675 my Dram runs at 1.644 I have to set the voltage for drop, the primary complaints I have with the UD5. Everything sufferes from drop.

My CPU is set to 1.475 in bios, which results in 1.488 under PC health, but 1.392v under load.

If Gigabyte would unlock LLC for us, I could my overclocks with a lower initial voltage. But with no load on the items a raise in voltage does no harm. Its what the voltage is after the load is there, that is what matters.

If your ram is really good I can give you some tips on running it at 1950mhz 9-9-9-24-41-2t  That is the highest I accheived on my 1055T 4ghz with the ram at 1950mhz (Corsair 1600mhz XMS3) 2860mhz NB rock solid stable at just over 1.54v CPU 1.65v Ram, 1.312v CPU-NB



Edit: DO note though, I picked my my 1100T last year for its low voltage opperation at decent clock speeds. 24/7 I run 1.275v on the CPU @ 3700mhz, 1.35v on the DRAM @ 1600 9-9-9-27-42-2T, 1.1v on the CPU-NB @ 2400mhz and on my GTX480's which have a shipped voltage of 1038mv I run them at 996mv. I like to keep temps down so for 24/7 useage I undervolt.


2nd Edit: I really can drop in my 1055t for fine tuning help if you need. Its just chilling in my M4N98TD atm.

[rooie]

Can not get it prime stable at this moment, whatever i try!
Everest/Aida4004mhz  stable but    thats Everest/Aida, do not mean anything!

3500mhz is still the best option!
i read that you also have/had an Asus mobo, all what i learned with Asus M4A89TD pro/usb3 is not usable with Gigabyte.

But... you still have pointed me in the right direction!

Will  tomorrow go furtheron, it's late evening overhere, bedtime.

[Dark Mantis]

You are talkiong about running your memory at extreme speeds. I haven't folowed the thread  but do check with absic first before you do it as this can be very dangerous for your CPU because of the memory controller.

[Lordred]

While true on a C2 and C3 step CPU, the E0's have incredible IMC's which take a lot of punishment. I have been running in excess of 1600mhz on my 1055T for a year without a hitch. Something I could not dream of doing on a C2 step CPU.

All overclocking shortens the life of your parts, it is a question of how far you wish to take it. If you keep only two dimms installed, it is much easier to run the AMD IMC over 1600mhz. While with all four dimms populated it is a wise idea to limit yourself to 1600 and under.

[Dark Mantis]

That's fine then as long as you are aware of the possible pitfalls involved.