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i7 3820 - 4820 Overclock Club - Page 190

post #1891 of 6491
Quote:
Originally Posted by theJaybo View Post

Thanks for the tip, Ill try that.
It seems my ram Is limiting me. When I overclock the FSB, and try to hit my target ddr3 speed (1600mhz) the fsb overclock obviously raises what my ram will do. So 1666mhz is the closest I can get without down clocking. My Corsair Vengeance sucks balls, and wont OC at all. A stable OC will fail with even 66mhz added to the ram. Even going to 1.65v, raising ram timings from 9-9-9-24 to 11-11-11-30 does nothing.
So anyway this stuff sucks. Ive been reading lots of good things about G.Skill and I think Im set on some 2133mhz Ripjaws Z's. I have a buyer for my 32gb vengeance and will lose no money.
Here is my question. I currently have 8x 4gb Dimms filling my P9X79.The 8 dimms were purchased in two 4 dimm kits. In other words NOT MATCHED. I wonder if trying to overclock 2 batches of separate dimms together is causing me issues. Also if trying to overclock 8 dimms (alot of power) is an issue.
So having said that Ill be moving to 4x 8gb dimms of a much higher speed. Most likely running downclocked but far faster than what I currently have.
Thoughts ?
Im also worried that CPUID hardware monitor from time to time drops voltage stats. IE: +12v, +5v and +3v rail drop to like less than 1v for a split second, this is evident in the minimum recorded value in cpuid. Im also worried about the +5v rail, its 5.000v bang on and drops to 4.920 quite a bit and stays there during stressing.

After doing voltage logging it seems all rails have a voltage drop for a split second right after stressing begins, then pump back up.

I have like tweaked and restarted 20 times and couldn't get it to work at 1.280/1.290 when on full load (Prime 95) since it doesn't crash on this Vcore and throttle back at idle to 1.100volts. For the life of me, I just want to ask for the record, is this VCORE at 1.280 deteriorate my cpu 27/4? Let's think about it in this way: If I did no overclocking and my system loaded on default values, how long would it last? (I know this depends on the cpu but in general). And if I run my cpu at 1.280volts 27/4, how much % of the lifespan of the cpu would I be losing? I hope I've made my self clear. Thanks in advance.
post #1892 of 6491
What PSU do you use?
Stick with 16 gigs in 4 slots, less slots less problems 4x4=16 better O/C results
My system never uses more than 3 gigs of memory at one time that I can see
You can get more later
Asus has 3 Utube videos specifically for P7X79 motherboard overclocking
Just so you can see what is what and where....take notes it helps you remember cause its gets pretty deep
In the end I used the software and manual mode...... XMP profile held me back 4.3 I think that was it
Now 4.6 all day, 4.75 if i need it, 5.0 for benching
Good Luck
Edited by roberta507 - 12/29/12 at 8:05pm
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post #1893 of 6491
Thread Starter 
Quote:
Originally Posted by diamondmines View Post

I have like tweaked and restarted 20 times and couldn't get it to work at 1.280/1.290 when on full load (Prime 95) since it doesn't crash on this Vcore and throttle back at idle to 1.100volts. For the life of me, I just want to ask for the record, is this VCORE at 1.280 deteriorate my cpu 27/4? Let's think about it in this way: If I did no overclocking and my system loaded on default values, how long would it last? (I know this depends on the cpu but in general). And if I run my cpu at 1.280volts 27/4, how much % of the lifespan of the cpu would I be losing? I hope I've made my self clear. Thanks in advance.

That voltage will NOT KILL your CPU ! How long do you plan to keep your 3820 ? I saw a guide around here somewhere about that topic. But I know this voltage can http://valid.canardpc.com/show_oc.php?id=2569605 biggrin.gif
Edited by HOMECINEMA-PC - 12/29/12 at 2:59pm
post #1894 of 6491
ok finally have a 4.625 that is stable for 12 hours of prime.....good enough for me...rofl

but i was able to drop the vcore a bit by giving more vtt and vccsa....i think i can live with the temps too



btw 21C ambient temps
post #1895 of 6491
Thread Starter 
Quote:
Originally Posted by zerokool_3211 View Post

ok finally have a 4.625 that is stable for 12 hours of prime.....good enough for me...rofl
but i was able to drop the vcore a bit by giving more vtt and vccsa....i think i can live with the temps too

btw 21C ambient temps

Hooray you finally did it its about time tongue.gif as long as that clock , vcore and temps are in your ZONE and you can fold or whatever it is you do....thumb.gif good stuff wheee.gifwheee.gifwheee.gif
post #1896 of 6491
Quote:
Originally Posted by Rmerwede View Post

You WILL blow something up lol!
Lets try this for 4625 Mhz:
- Set BCLK strap ratio to 1.25. Let BCLK auto populate, or leave at 100.
- Set CPU Ratio to AUTO
- Set Turbo Ratio to 37. Enable for all cores.
- Turn off any power savings features like SpeedStep and C1E and such.
- Set CPU Vcore to 1.4v
- Set PLL voltage to 1.9v
- Set Vcc voltage to 1.2v
- Set Vtt voltage to 1.2v
- Set RAM voltage to 1.525v if your RAM is 1.5v, or 1.675v if it is 1.65v.
- Locate Load Line Calibration, and turn it up to the highest setting.
These settings should get you to boot at that frequency. The voltages are a bit high, but nothing that will damage your system in the short term. You WILL want to lower these voltages as much as stability allows. Your Vcc voltage should always be within .5v or your RAM voltage (i.e. RAM = 1.5v then Vcc should = at least 1.0v). Try these and let us know how it goes. For further posts, feel free to build a signature rig, so we know what hardware you have. Also, post some more BIOS shots with the new settings.
Good Luck!
cheers.gif

Most those settings are named differently and I have no idea which is which. I've tried various combinations that seemed logical (aka, voltages that seemed to fit around those values) but nothing worked. I simply cannot get it to boot with a strap ratio of 1.25. It always goes back to triple boot and then defaults.

This is how my bios looks: Click for Post#: 1791
post #1897 of 6491
Quote:
Originally Posted by roberta507 View Post

What PSU do you use?
Stick with 16 gigs in 4 slots, less slots less problems 4x4=16 better O/C results
My system never uses more than 3 gigs of memory at one time that I can see
You can get more later
Asus has 3 Utube videos specifically for P7X79 motherboard overclocking
Just so you can see what is what and where....take notes it helps you remember cause its gets pretty deep
In the end I used the software and manual mode...... XMP profile held me back 4.3 I think that was it
Now 4.6 all day, 4.75 if i need it, 5.0 for benching
Good Luck

My specs:
ASUS P9X79
i7-3820
32GB *4x8* DDR3 1600MHz CL9 Corsair Vengeance
XFX HD7750
Contact 30 as cooler.
Cooler Master 750W + 80 Plus Bronze
post #1898 of 6491
Quote:
Originally Posted by zerokool_3211 View Post

ok finally have a 4.625 that is stable for 12 hours of prime.....good enough for me...rofl

but i was able to drop the vcore a bit by giving more vtt and vccsa....i think i can live with the temps too
Warning: Spoiler! (Click to show)

btw 21C ambient temps
Yea this looks better
post #1899 of 6491
Thread Starter 
This one is betterer 4.8Ghz@2024 temps between 49c & 51c full load p95 stable 2hrs 1.4vcore never benched this clock before thumb.gif

wheee.gif
post #1900 of 6491
Quote:
Originally Posted by HOMECINEMA-PC View Post

This one is betterer 4.8Ghz@2024 temps between 49c & 51c full load p95 stable 2hrs 1.4vcore never benched this clock before thumb.gif

wheee.gif
Those temps are very good but isnt your 5016Mhz clock close to that Vcore ?
Nice PineApple btw smile.gif
Edited by X79Extreme7UK - 12/30/12 at 7:37am
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