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OC FX-8120 BIOS settings for a stable 4500 MHz - Page 9

post #81 of 175
Thread Starter 
Quote:
Originally Posted by MiyukiChan View Post

Well mine is realy stable and pass both Prime95 and OCCT but i have a real major issue now..
When i play games all of a sudden the screen get's black lines and decides to start shaking violently then i when i exit to desktop i have 1 and a half screen of the same desktop..
I did set it to "200" i guess that's what you mean by manual? It doesn't really fluctuate but it shows 201 instead of 200 and 4515.. *confused*

Yes, your are correct, "200 manually". Not sure why it displays "201" though!
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post #82 of 175
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Quote:
Originally Posted by damric View Post

Looks like it's coming along nicely. Next tune your memory and memory controller, which is a real pain on the FX to get it just right and stable, at least it was for me.

What is a good starting point, bumping up the frequency and voltage? What about the fsb? I see a lot of people posting they have increased it. Some even up to 248! Crazy...
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post #83 of 175
What kind of memory are you using? Increasing the FSB can give more performance but it's because you overclock the system all-together instead of just the CPU.. at-least i think so. But usually you won't have to change the memory voltage if you don't have it at like 1.50 and the ram is made for 1.65 then it's ok to change. I'm using the XMP profile and it works wonders.
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post #84 of 175
Quote:
Originally Posted by Xdj1 View Post

What is a good starting point, bumping up the frequency and voltage? What about the fsb? I see a lot of people posting they have increased it. Some even up to 248! Crazy...

Trust me. Here is where the real challenge begins. You will need to experiment with the RAM frequency multiplier, as well as the reference clock (fsb). First make sure you know how to clear CMOS, because you will be doing it a lot.

What I would do first is manually loosen up your timings to something like 10-12-10-30-40 2T. Don't worry, you'll tighten them down later. Set your voltage to the highest your RAM is rated (check in the SPD tab or XMP tabs in CPU-Z or BIOS), usually 1.65V.

Then try booting with your highest available multiplier. If that one doesn't work, try one lower, ect.

Then you will start raising fsb while simultaneously lowering your other multipliers (CPU freq, HTL, NB) to keep them close to the settings you had when you found your CPU overclock.

When you crash or fail to boot, try raising CPU-NB voltage. Be generous here. AMD recommends up to 1.45v if needed on air cooling.

You might also need to raise your chipset nb (ht) voltage. Stock is usually around 1.1v or so, but don't be afraid to set it to 1.3v if needed.

When you find your best stable RAM frequency, we can move on to part 2, the timings.
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post #85 of 175
Quote:
Originally Posted by Xdj1 View Post

I decreased it to 1333 MHz...
I think I have caught the OC bug! It gets pretty exciting when you reach your goals!!!

I hear ya! The consensus is that you should not exceed 1.45V on these chips for 24/7 use. So try to stay at or below this voltage. I've gone as high as 1.6V for a 5.2GHz O.C. But that was under no stress testing and only for a few minutes. wink.gif
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post #86 of 175
hey guys i need help. im from brazil and buyed last week the 8120.
i tried overclock but with no luck until i saw this tread.
i have asus crosshair v and gskill ripjaws x 1866 cl9(2x4gb)
in the box of my cooler says 200+w cooler (its a v10 cooler master) and i saw the benchmarks of this cooler with others (water cooler and air cooler) and in the tests the v10 is same temps of wc (TEC helps).
but i set my vcore 1.40 @ 4ghz and now to 1.325 @ 4ghz and when i start the prime 95 or the occt the temps go up so fast, 15 sec from 39 to 52, and the cpu power off when it reachs 88°c usualy within 5 minutes.
i completed the prime95 (9 tests @ 8 cores) with 68°c only with desk ventilator/fan directly on the cpu.
my room temp is 28°C
idle cpu is 35/39
my power supply is a TT toughpower grand 1050w 80 plus gold.
vga is an old 9800gtx+
what i have done wrong?
why my temps are so high?

Obs. i reach 4.4ghz @ 1.40v @ 1333 ram only to prove that 8120 is not defective but not stayed with this speed.
sorry for any wrong word and thx for the help!!!
post #87 of 175
Well 28c is kinda warm i usually keep it like 20-21C what software do you use to monitor your temperatures with?
Did you disable or change anything else in your bios? And what bios do you use?
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post #88 of 175
This is going to be a pain in the ass for you to do but recheck your thermal paste and seating. I have the 8120 and Crosshair. I had hell of a time overclocking it didn't understand why it wouldn't go past 3.8 found out that i tightend the screws down on the Havik Aircooler to tight. Make sure the seating and thermal paste are good and dont tighting down all the way
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post #89 of 175
Quote:
Originally Posted by MiyukiChan View Post

Well 28c is kinda warm i usually keep it like 20-21C what software do you use to monitor your temperatures with?
Did you disable or change anything else in your bios? And what bios do you use?

brazil is warm, in summer hits 35-39. lol, i wish that in my room its 20° tongue.gif
i used hwmonitor, occt monitor and other one i dont remember. (cpuz)
vcore 1.325 20x200fsb
i disabled the options of energy saving (c6 state) and virtualization, memory 9-10-9-28 2t 1866 1.5v(g skill specs), the rest is default
my bios is the latest 1301
Quote:
Originally Posted by Ryncrash View Post

This is going to be a pain in the ass for you to do but recheck your thermal paste and seating. I have the 8120 and Crosshair. I had hell of a time overclocking it didn't understand why it wouldn't go past 3.8 found out that i tightend the screws down on the Havik Aircooler to tight. Make sure the seating and thermal paste are good and dont tighting down all the way

pain in the ass x 1000, the v10 is so hard to change. i remember that the thermal paste is in good amount (not excess) and i tighted the 4 screws a little hard, the seating does not change, its fixed.
but its a very useful information, i will recheck this!


thx, tomorrow i will post the results (im posting in my work, and i do the tests at night)
Edited by nrns - 4/11/12 at 11:49am
post #90 of 175
Quote:
Originally Posted by nrns View Post

brazil is warm, in summer hits 35-39. lol, i wish that in my room its 20° tongue.gif
i used hwmonitor, occt monitor and other one i dont remember. (cpuz)
vcore 1.325 20x200fsb
i disabled the options of energy saving (c6 state) and virtualization, memory 9-10-9-28 2t 1866 1.5v(g skill specs), the rest is default
my bios is the latest 1301
pain in the ass x 1000, the v10 is so hard to change. i remember that the thermal paste is in good amount (not excess) and i tighted the 4 screws a little hard, the seating does not change, its fixed.
but its a very useful information, i will recheck this!
thx, tomorrow i will post the results (im posting in my work, and i do the tests at night)

You can read more about OC'ing the BD here - http://www.overclock.net/t/1140459/bulldozer-overclocking-guide-performance-scaling-charts-max-ocs-ln2-results-coming

But i think if it's getting that hot your best bet might be a water-cooling solution did you use aftermarket thermal grease? If so did you make sure you use the right amount to much can actually cause it to run hotter. What's your HT Bus speed and NB Bus speed? Also I think that's to much voltage for 4.4 since i can hit 4.6 stable with just about 1.380~

Do you have LLC?
What case are you using and how many fans? How did you set them up?

Sorry for a ot of questions but it's to understand your situation better.
Edited by MiyukiChan - 4/11/12 at 1:24pm
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