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i7 3820 - 4820 Overclock Club - Page 21

post #201 of 6499
Guys, im interested what cpu coolers you use, especially those ones who have 4,8-5ghz
Im waiting for my new cpu and I will have COOLER Noctua NH-D14 SE2011, so dont what I can expect.
+1 140mm front fan, 1x 120mm back, +1x bottom fan.
post #202 of 6499
How many GFLOPS is this giving you biggrin.gif?
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post #203 of 6499
GFLOPS? Sorry im quite new to the overclocking scene

Cooling wise

CPU cooler- NZXT Havik 120 CPU Cooler which has 2 fans on it in push pull config

Chassis fans- 4x akasa Viper 120mm fans, and two fans that i had spare from my previous build
Edited by McGill2010 - 3/16/12 at 7:14am
post #204 of 6499
whats the max temp i should be letting this processor get to?
post #205 of 6499
So am I to understand that with the 3820 we can pretty much over-clock to 4.3ghz simply by increasing the multiplier?

I mean to my knowledge Sandy Bridge chips running above 4.6 require substantial cooling, and in my experience substantial cooling usually requires lots of noise. I'm thinking an H80 with fans on max 24/7, or whenever there is load.

I mean for gaming and daily use 4.3 should be more than enough, shouldn't it? I'm ordering this chip next month with an AsRock motherboard, I'm just wondering what kind of noise levels I can expect to keep this cool at certain overclocks.
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post #206 of 6499
Honestly this chip dosent seem to run hot at all IMO. I'm running 125x37 for 4.6ghz and it will hit ~70c under full load with Prime95 or IBT running. Thats using a Noctua cooler with a single fan, with a H80 it should run much cooler. Key i found is power setup, i can run mine at 1.288v with optimal settings for the VRM, that combined with Intel Speed Step enabled gives me 1.5ghz at idle and ~36c. When gaming its rare to see 50% cpu usage so it stays below 60c, overall my old AM2 setup ran way hotter. . For my chip 4.7 or 4.8 does require a jump in voltage to 1.36-1.40v which makes more heat to the point i didnt bother trying for 5ghz, 4.6ghz was the sweet spot for me. Only thing to watch for is the VRM temps, my board has a temp probe for them and they run on average 5-10c more than the cpu, so if your water cooling the chip make sure you have some air flow over that area.
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post #207 of 6499
Quote:
Originally Posted by james_ant View Post

So am I to understand that with the 3820 we can pretty much over-clock to 4.3ghz simply by increasing the multiplier?
I mean to my knowledge Sandy Bridge chips running above 4.6 require substantial cooling, and in my experience substantial cooling usually requires lots of noise. I'm thinking an H80 with fans on max 24/7, or whenever there is load.
I mean for gaming and daily use 4.3 should be more than enough, shouldn't it? I'm ordering this chip next month with an AsRock motherboard, I'm just wondering what kind of noise levels I can expect to keep this cool at certain overclocks.

my understanding is that the multiplier is locked @ 42. so you can only do 4.2Ghz without increasing the BCLK.

And to address the other part of your question. 4.3 or even 4.2 is "good enough". anything higher IS better, but anything more than 4.6 Ghz is for epeen.

I used to run 4.5 Ghz but my heatsink wasn't enough for that clock as my temps reached 81 C under load. However since you have an H80 you can easily get 4.6 Ghz without worrying about temps. set your multi @ 37 and your bclk @ 125 and you'll get 4.6 Ghz
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post #208 of 6499
Quote:
Originally Posted by mcandmar View Post

Honestly this chip dosent seem to run hot at all IMO. I'm running 125x37 for 4.6ghz and it will hit ~70c under full load with Prime95 or IBT running. Thats using a Noctua cooler with a single fan, with a H80 it should run much cooler. Key i found is power setup, i can run mine at 1.288v with optimal settings for the VRM, that combined with Intel Speed Step enabled gives me 1.5ghz at idle and ~36c. When gaming its rare to see 50% cpu usage so it stays below 60c, overall my old AM2 setup ran way hotter. . For my chip 4.7 or 4.8 does require a jump in voltage to 1.36-1.40v which makes more heat to the point i didnt bother trying for 5ghz, 4.6ghz was the sweet spot for me. Only thing to watch for is the VRM temps, my board has a temp probe for them and they run on average 5-10c more than the cpu, so if your water cooling the chip make sure you have some air flow over that area.

Thanks for the input, I was actually really curious about temps/cooling and how much is required.

A 700 - 900 mhz over-clock is more than enough for me. I plan on getting an AsRock Extreme6 so I shouldn't have much of a problem with VRM cooling (12 + 2 phase with heat syncs and I will have a fan blowing directly on them).

The only thing I'm not sure about is how much my RAM might limit my overclock, getting a high ram overclock doesn't concern me as much as having to lower my stock ram frequency to get a stable overclock.

EDIT: oh and I did some googling and it seems the max multiplier is 43 and not 42, at least according to that thread.
Edited by james_ant - 3/18/12 at 12:00pm
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post #209 of 6499
RAM speed is something to consider if you change the BLCK. With 100 BLCK you have the default speeds 1600,1800,2133 etc. With 125 BLCK they change to unusual frequencys. For example i have 2133mhz ram but with the 125 BLCK my options are something like 2000mhz or 2300mhz. Cant remember the exact numbers. Basically i can run 4300mhz CPU with 2133mhz memory, or with 125 BLCK i can run 4600mhz CPU with 2000mhz memory.
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Seagate Barracuda 7200.12 1Tb - x2 RAID 0 Seagate Barracuda SATA3 2Tb Generic DVD writer Noctua NH-U12F 
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post #210 of 6499
It also depend on the chip's imc.

This 3820 can go 166 strap (on air but crapped out with sub ambient cooling) and leave more room for multiplier up overclocking...

screenshot047q.jpg
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