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1055t 4ghz problem (unstable)

post #1 of 12
Thread Starter 
I am trying to get my 1055t to 4ghz it is really unstable even at 3.8ghz.

i have tried bringing down the memory clock to 1120 but then the ram timings change to 6.6.6.15 and when i try changing the ram timings the computer doesn't display anything, it will boot but no screen no audio.

here is the bios specs.

vcore:1.4v
nb: 1.3v
dram: 1.6v
nb/cpu frequency 1960-2000
ht 1960
fsb 280
multiplier 14
dram 400mhz
cool 'n' quiet is diabled so is c1e.

I know that the specs above are not 4ghz but at least i am able to load windows without bsod
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post #2 of 12
I'm not an expert but what I've heard from others, you need some more NB freq, as high as 3ghz.
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post #3 of 12
Thread Starter 
well i heard that i need to lower the NB frequency to like 2000. but ill give it a try not sure if i can get the northbridge that high highest i think is 2700

well i tested the 2800 northbidge frequency and it crashed faster
Edited by antisphere - 1/21/11 at 1:27am
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post #4 of 12
Thread Starter 
ok i finally got this working stable with 6.6.6.15 ram timings. upped the north bridge frequency to 2200 mhz and changed the load line to 0% in the bios.
idles about 39c and max load is 71c (i know that its high but it wasn't during gaming it was under intelburntest)
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post #5 of 12
Remember that the Northbridge frequency can be used to obtain stable overclocks at high speeds.

You can use this formula "Northbridge Frequency (+/-200) = (CPU-Frequency * 2 ) /3.15" to calculate the best nb for your oc.

(this formula has been taken from Dolks guide to overclocking the northbridge)
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post #6 of 12
What is your exact kit of Ripjaws? If they're the 1333 CL9 Ripjaws, this may explain the overclocking hold-back.
post #7 of 12
Quote:
Originally Posted by Pir View Post
Remember that the Northbridge frequency can be used to obtain stable overclocks at high speeds.

You can use this formula "Northbridge Frequency (+/-200) = (CPU-Frequency * 2 ) /3.15" to calculate the best nb for your oc.

(this formula has been taken from Dolks guide to overclocking the northbridge)
This doesn't always provide the right clocks. It's best to overclock the CPU first, then go back and see what is required (CPU/NB voltage or more CPU VCORE) for the CPU/NB clock.

@OP

{read quote above}

The best thing to do is find a base. Start by seeing how low you can take your voltage at stock clocks (2800/2000). From there, increase your baseclock (HTT) notch by notch (your choice, 5Mhz, 10, 20, etc) until it's unstable. Then boost your voltage by a certain amount; again your choice (.0125v, .025v or .05v) until you're stable again. Keep doing this until you find a good overclock. Not all 1055T's will do 4Ghz, remember this.


Quote:
Originally Posted by xd_1771 View Post
What is your exact kit of Ripjaws? If they're the 1333 CL9 Ripjaws, this may explain the overclocking hold-back.
@OP *read above quote*

There is a point here as well; you need to keep your RAM at rated or lower than rated speeds/spec.
Edited by GanjaSMK - 1/21/11 at 10:16am
    
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post #8 of 12
Take your VCore to 1.52
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post #9 of 12
Wow, 71c????

You've got an AMD chip, not an Intel. I think it's time to back off on that overclock there.
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post #10 of 12
Quote:
Originally Posted by antisphere View Post
I am trying to get my 1055t to 4ghz it is really unstable even at 3.8ghz.

i have tried bringing down the memory clock to 1120 but then the ram timings change to 6.6.6.15 and when i try changing the ram timings the computer doesn't display anything, it will boot but no screen no audio.

here is the bios specs.

vcore:1.4v
nb: 1.3v
dram: 1.6v
nb/cpu frequency 1960-2000
ht 1960
fsb 280
multiplier 14
dram 400mhz
cool 'n' quiet is diabled so is c1e.

I know that the specs above are not 4ghz but at least i am able to load windows without bsod
I think you're mobo is the largest problem you have. Trying to go above 270 or 275 FSB on a 785 chipset mobo is real difficult. Get a better board if you want to get closer (and stable) to the magic 300 FSB. I have 2 boards with that chipset and they're competent overclockers but you can only get so much out of that low end hardware.
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