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i7 3820 - 4820 Overclock Club - Page 29

post #281 of 6499
Iirc it will begin to throttle itself at 90c, but a good air cooler will keep it around 70 (depending on the ambient air of course). The hottest temp I have had was 72c @4.6Ghz while running P95 on all cores and threads. My rig is in my basement though, where the ambient is pretty cool. ~20c
 
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post #282 of 6499
Thats exactly what i needed ramsey! What speeds were you able to obtain on that chip with just the fans (i will keep in mind that your room temp is cooler).
post #283 of 6499
This is how intel OC'ed 3930k to 4.75ghz with 40x and 95mhz blck, 1.25 multi, making ram at 2215mhz


th_overclock-sandy-bridge-e-4.jpg


Link



anyone tried it like that?
Edited by TheHunter - 3/29/12 at 3:57pm
post #284 of 6499
I have lame question, as far as case fans are concerned.
I have ASUS P9X79
One COOLER Arctic Fan F12 PWM 1200rpm max
One COOLER Arctic Fan F9 PWM 1800rpm max
and one unknown cooler with my CASE CoolerMaster Elite 500rpm still

Now Im curious about rpm and PWM. Im struggling about it.
I use Asus suite II - Fan xpert+ for controlling RPM. And only which works 100% is control rpm of my Noctua CPU fan and COOLER Arctic Fan F12 PWM . My Fan F9 PWM has sometimes 1800 still despite of custom rpm which I set up, just doesnt work according to my settings(sometimes it works, for 1-2changes, then it doesnt)
Coller with my case has 500rpm no matter what.

Now here comes my question. Is there another way how to regulate rpm of fans (I tried bios, its connected with Suite II)? Where could be the problem with not changing rpm of my fans according to my settings? Its necessary to have fan with PWM mark in order to regulate rpm? or not.
For instance if I want to buy http://www.coolermaster.com/product.php?product_id=4375 its possible to regulate rpm?
note: how about this SCYTHE KM02-BK-5.25 Kaze ACE?
Thanks for explanation
Edited by Mailo34 - 3/28/12 at 8:11pm
post #285 of 6499
Mailo34: The ones in the link are not pwm fans, they will need a fan controller to be adjustable. PWM fans will have 4 wires (power, ground, rpm reporting, and pwm control). These are the ones I use. Can't beat em for the price and they are 100% controllable via bios all the way from 600rpm to 2000rpm (so totally silent to hurricane loud). They are the exact same fans that come on the Hyper 212+ I have 4 of them hooked up to my R4G.
http://www.Newegg.com/Product/Product.aspx?Item=35-103-069



Lividhatter: I am running a push pull configuration (2 fans) on my cooler and they run around 600 rpm at idle, 900 or so during gaming load, and around 1500 rpm at 100% load (during stress testing). I have them set at a custom profile that keeps them near silent while gaming and still keeps the CPU running cool. My chip only hits mid 50's while gaming, and that is the most stressful thing I do (besides the occasional benchmark run). I am running 4.625Ghz by using a 1.25 strap and a 37 multi. Hope this helps.
Edited by Ramsey77 - 3/29/12 at 3:52am
 
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post #286 of 6499
Ok thanks and if I purchase SCYTHE KM02-BK-5.25 Kaze ACE and connect some fan with no PWM, just based on voltage and I set up higher rpm than specification shows, its theoreticaly possible? or is it necessary to be aware of max rpm of particular fan..
post #287 of 6499
A fan that gets the full 12v of juice will only run its maximum rated speed, so a 1000rpm fan drawing the full 12v will only run 1000rpm and a 600rpm fan will run 600rpm with 12v. So no, it is not possible to "overclock" a fan using a fan controller. With a fan control, you are just adjusting how much voltage reaches the fan, with 12v being max. In my opinion, the Lamptron FC5 version 2 is the best controller out there.
http://www.amazon.com/Controller-Version-Changeable-Controls-TempretureDisplay/dp/B004OEDYHY
Edited by Ramsey77 - 3/29/12 at 3:46am
 
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post #288 of 6499
After reading a little ive overclocked my 3820 to 4.65 ghz.

I did it a little different to most comments here since 125blck and 37x multi would mean that my memory would be running at 2000mhz instead of 2133mhz.

So what i did was disable all turbo nonsense. Then went through all the voltages and set them back to standard, 1.5 vram, 1.1 vtt etc. since messing with the settings and presets in the bios had driven up my voltages on these things without notifying me.

Then i disabled hyperthreading since this is a gaming pc. I tried bf3 and skyrim with and without HT at standard clocks and was significantly faster with HT disabled.

Then i set overclock mode to X.M.P so it would read the timings off the memory (even though it seems to have used slightly tighter than standard timings, but very close to spec)

Then i set the blck to 133 and the multiplier to 35 which gives me 4650Ghz on the 3820. I achieved stability at 1.32 vcore which is a lot lower than most suggested here.
This runs my memory at 2125mhz.

Now in this overclock i have altered the BLCK and NOT the blck strap, any comments on how wise this is would be welcome.

Disabling the turbo seemed to disable speedstep too so i have since been back in and re-enabled speedstep while leaving turbo mode disabled.

The temps go to around 61/62 over 30mins of prime95 with the corsair h80 cooler set to its slowest mode.

SPECS

i7 3820 + Corsair H80
ASUS Rampage IV Formula
16Gb DominatorGT C9 2133Mhz
2x6970

456

Judging by them temps and the voltage i should be able to push the 3820 much further but for the moment im happy with this and allows me to fully max out bf3 on the busiest maps and stay close to the 120fps for my 120hz screen. smile.gif
Edited by Psymn - 3/29/12 at 2:06pm
post #289 of 6499
Quote:
Originally Posted by Psymn View Post

After reading a little ive overclocked my 3820 to 4.65 ghz.
I did it a little different to most comments here since 125blck and 37x multi would mean that my memory would be running at 2000mhz instead of 2133mhz.
So what i did was disable all turbo nonsense. Then went through all the voltages and set them back to standard, 1.5 vram, 1.1 vtt etc. since messing with the settings and presets in the bios had driven up my voltages on these things without notifying me.
Then i disabled hyperthreading since this is a gaming pc. I tried bf3 and skyrim with and without HT at standard clocks and was significantly faster with HT disabled.
Then i set overclock mode to X.M.P so it would read the timings off the memory (even though it seems to have used slightly tighter than standard timings, but very close to spec)
Then i set the blck to 133 and the multiplier to 35 which gives me 4650Ghz on the 3820. I achieved stability at 1.32 vcore which is a lot lower than most suggested here.
This runs my memory at 2125mhz.
Now in this overclock i have altered the BLCK and NOT the blck strap, any comments on how wise this is would be welcome.
Disabling the turbo seemed to disable speedstep too so i have since been back in and re-enabled speedstep while leaving turbo mode disabled.
The temps go to around 61/62 over 30mins of prime95 with the corsair h80 cooler set to its slowest mode.
SPECS
i7 3820 + Corsair H80
ASUS Rampage IV Formula
16Gb DominatorGT C9 2133Mhz
2x6970
456
Judging by them temps and the voltage i should be able to push the 3820 much further but for the moment im happy with this and allows me to fully max out bf3 on the busiest maps and stay close to the 120fps for my 120hz screen. smile.gif



Nice Work. Welcome to OCN.

I'm going to be trying XMP profile tonight too. Want to get my ram times close to spec. Also think i can lower the vcore.

Have you ran 3dmark11 or pcmark7 yet? If so what kind of scores are you achieving? Just curious what your 6970's will do compared to my 480's
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post #290 of 6499
Just downloaded and run 3dmark11

Heres the results; http://3dmark.com/3dm11/3070718;jsessionid=q63x25kyrkasx0wj8spvjdf8

Dont know how good that is lol.
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