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i7 3820 - 4820 Overclock Club - Page 189

post #1881 of 6498
Quote:
Originally Posted by diamondmines View Post

I haven't played around with VCore. But when I Prime 95 it, the max I see is 1.338volts. Is this a dangerous Vcore to max to? How would the life span of my CPU be effected by this Vcore overall? When idle, it drops to 1.070. I guess it looks fine but if there is a problem or if I have adjusted something not necessary, please tell me guys.
Some people have stated on rog.asus.forums that 1.338volts on the vcore is pretty high and it will hurt my cpu. Because it was on auto mode, it only went up to 1.338 on full load prime 95. What vcore should I not pass for 4.3GHz, I don't think I want to go further with this thermaltake contac 30 cooler...
Thanks.
My specs:
ASUS P9X79
i7-3820
32GB DDR3 1600MHz CL9 Corsair Vengeance
XFX HD7750
Contact 30 as cooler.
Cooler Master 750W + 80 Plus Bronze

FYI, I also run at 4.3, but I manually set my voltage to 1.275 and left EVERYthing else at "auto". You can set up the same way and you'll drop your temps a bit. These Asus boards supply more CPU voltage than is required in AUTO mode. I can run Prime95 24/7 at that voltage; any lower and I start to crash (tried 1.25V, but that was a touch too low). 1.338V won't hurt your CPU at all, but temps will be a bit higher. I know nothing about the Thermaltake contact 30 cooler, but I'd be more focused on what your temps are at that voltage. Temperature is the killer.
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Hard DriveHard DriveHard DriveCooling
256GB ADATA S900 x 2 RAID0 3TB x 2 RAID1 1TB x 2 single storage Custom water loop 
CoolingCoolingOSMonitor
XSPC EX360 rads x 1 / AlphaCool Monsta 360 x 2 ... Dual D5 variable pumps Windows 7 64 bit SP1 Samsung 27" LED 
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Logitech G110 Corsair AX750 Case Labs Magnum M8 Logitech G500 
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post #1882 of 6498
Quote:
Originally Posted by theJaybo View Post

Ok I've developed a new problem.
Im shooting for higher over clocks, but when I run furmark + prime95 she locks up almost instantly. Ive tried this at the stock 3.6ghz and she runs great.
When I say she locks up, I mean it just powers off. Almost instantly after start both tests the system just turns off. Even before temps build. I can get stable 4.5ghz in prime95, but as soon as I take a stable oc and add a 3d test at the same time, boom off she goes.
Ive read this before about "stable" overclocks becoming unstable if the cpu and graphics are stressed at the same time.
PSU is Corsair HX750 and a Asus HD7850 (running at stock speed). No power issues so far, little low on the +5v rail (4.96) but thats it. Again, Im stable at stock speeds with video tests.
Ideas ?

Could be that LLC @ extreme fault, dont use such aggresive value, if you can scale it 1-10 extreme means 10, use max 7-8..

I know a m8 who used LLC 10 @ I5 2500K and after a week of usage he couldnt OC any higher anymore (use to run 4.8ghz, now he's stuck ~ 4.5ghz max), it looked like he degraded cpu or something.
post #1883 of 6498
Quote:
Originally Posted by X79Extreme7UK View Post

4625 @ 1.472v under load ???? eek.gif

Quote:
Originally Posted by HOMECINEMA-PC View Post

Gidday criminal what have you been up to questionmark.gif

yeah idk why i need so much but....lowest i have been able to go yet is 1.415 with llc extreme....gives me 1.472 when priming so idk.....runing low pll vccsa and vtt though
post #1884 of 6498
Quote:
Originally Posted by Bart View Post

FYI, I also run at 4.3, but I manually set my voltage to 1.275 and left EVERYthing else at "auto". You can set up the same way and you'll drop your temps a bit. These Asus boards supply more CPU voltage than is required in AUTO mode. I can run Prime95 24/7 at that voltage; any lower and I start to crash (tried 1.25V, but that was a touch too low). 1.338V won't hurt your CPU at all, but temps will be a bit higher. I know nothing about the Thermaltake contact 30 cooler, but I'd be more focused on what your temps are at that voltage. Temperature is the killer.

Thanks a lot Bart. I will do that.
post #1885 of 6498
Thread Starter 


Heres a 4.3Ghz screener maybe this might help you with some settings thumb.gif
post #1886 of 6498
Quote:
Originally Posted by TheHunter View Post

Could be that LLC @ extreme fault, dont use such aggresive value, if you can scale it 1-10 extreme means 10, use max 7-8..
I know a m8 who used LLC 10 @ I5 2500K and after a week of usage he couldnt OC any higher anymore (use to run 4.8ghz, now he's stuck ~ 4.5ghz max), it looked like he degraded cpu or something.

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.
Edited by theJaybo - 12/28/12 at 6:35pm
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My Rig
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CPUMotherboardGraphicsRAM
Intel i7-3820 asus rampage iv formula asus radeon hd7850 corsair vengeance lp 
Hard DriveHard DriveCoolingOS
intel 330 180gb ocz agility 3 corsair h80 Win7 x64 
MonitorPowerCaseMouse
samsung sb24b300 corsair hx1050 coolermaster STC-T01 zalman m300 
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Corsair MM200 
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post #1887 of 6498
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.



This was easy for me and it will be for you

1.Have same motherboard
2.Have G.Skill ram 2133 Ripjaws only 16 gigs but 4 slots
3 Use 125 strap
4 Increase multiplier
37 core =4.6
38 core=4.75
40 core =5.00 with a little extra voltage all around
New to this thread but trust me i think i read every post on the 3820 there is here
I might have oversimplified the answer just manually overclock not auto
Edited by roberta507 - 12/28/12 at 9:31pm
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post #1888 of 6498
Quote:
Originally Posted by Bart View Post

FYI, I also run at 4.3, but I manually set my voltage to 1.275 and left EVERYthing else at "auto". You can set up the same way and you'll drop your temps a bit. These Asus boards supply more CPU voltage than is required in AUTO mode. I can run Prime95 24/7 at that voltage; any lower and I start to crash (tried 1.25V, but that was a touch too low). 1.338V won't hurt your CPU at all, but temps will be a bit higher. I know nothing about the Thermaltake contact 30 cooler, but I'd be more focused on what your temps are at that voltage. Temperature is the killer.

I've given it a 1.280Vcore but the voltage doesn't drop down when idle, it stays on 1.28. It passes Prime 95 with 1.280 at 4.3GHz but I want it to undervolt when it's 1.2GHz idle. It doesn't do that. I have tried the offset but it looks complicated. Should I turn off Turbo Boost? How should I manage this? What really does the offset do? The min offset is 0.800v and I don't know how it works.

Thanks.
post #1889 of 6498
Quote:
yeah idk why i need so much but....lowest i have been able to go yet is 1.415 with llc extreme....gives me 1.472 when priming so idk.....runing low pll vccsa and vtt though

This is a bit high, normally that Vcore is the region of 5000Mhz or very close. What is the highest clock you can achieve with that chip? also have you got a chance to test it with another board (a friend maybe), preferably with a different model or make?
post #1890 of 6498
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. Thank you so much Thorsson for giving me everything I need.
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