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i7 3820 - 4820 Overclock Club - Page 157

post #1561 of 6499
Great thread!! Just finished reading pages 100-156. Aside from one troll, great stuff! I learned a lot today, the main lesson being: you OCN guys are bat***** crazy! biggrin.gif I just but my new 3820 rig together (with the infamous burning GA-X79-UD3 motherboard), and I'm looking to get back into the OC game. I've been OCing since the pentium 3 days (old man here), but I'm out of the loop when it comes to new stuff like SB/SB-E. Right now, I've only bumped the multiplier to 43 (no other changes). Didn't do this as an OC, but more to get a baseline on what my new case and cooling is like (CM Storm Trooper, Corsair H100, stock fans/TIM). Plus, I also wanted to see how the auto-voltage works when the CPU is stressed. And yes it does sound like 2 rockets having sex on startup! I think I need some cougars. And some quiet new fans. tongue.gif

So me being an "experienced noob", I have questions that you geniuses might be able to answer:

1) where I can find info on the PCI specs for SB-E? When I OC, I HATE OCing the PCI bus in ANY way, even a little. So I want to know how to keep the PCI bus stock while pushing the CPU. How do you mess with the base clock on these things and keep the PCI bus at stock?

2) why don't more of you use OCCT for stress testing? All I see on this forum is IBT and Prime95. The newest OCCT has temp monitoring, AVX support, linpack, ram stressing, etc, all in one package. What am I missing here? OCCT seems like the perfect tool to me, and you guys are pros, so I know there must be a reason!

3) with the multi set to 43, and everything else auto, the CPU voltage tops out at 1.28V after 8 hours of Linpack testing with OCCT (no AVX since I had no idea what that was until I read this thread). smile.gif Is that voltage good, bad, or average? It sounds a bit low to me, but I'm rusty with OCing and I know NOTHING about SB-E.

Thanks guys!
P.S. HOMECINEMA-PC and X79Extreme7UK are certifiably INSANE!!! You guys are NUTS!! tongue.gif
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post #1562 of 6499
Quote:
Thanks guys!
P.S. HOMECINEMA-PC and X79Extreme7UK are certifiably INSANE!!! You guys are NUTS!! tongue.gif

Thanks mate thumb.gif and welcome wave2.gif
Good chip choice. We ve been very happy with i7 3820 (seems to be talking on behalf of everybody here LoL, but I'm sure most of them will agree). It overcloks insane and performs great. Let's hope you got lucky with the silicone lottery drum.gif

Yea, me and me old mate HOMECINEMA-PC (3820 #1 overclock) have gone a bit crazy(ish). I believe there is still a bit further to push these chips. One thing tho, you definitely need a very good cooling. H100 is a good choice I believe. I think it can cope with temps at around 1.40v~1.45v with 20~25C Ambient. Yet, from my experience; custom liquid setup is the best option (if you decide to go custom, pls pm me). With regards to your questions; there must be an option in bios to control the PCI speed. I agree OCCT is a very good stress testing program. I ve mainly been using P95 as most ppl tend to use that, so we can cross-check the results easier and quicker. Thats the only thing in my part why I use P95. Also i sometimes use IBT for quickness. But I am doing some changes in my cooling setup and do the next test with OCCT for you. thumb.gif

1.28v is a very low Vcore for 3820 and well within acceptable range. I believe it can run stable with even lower voltages at that clock. Upto 1.4v seems to be in safe voltage. Over 1.4v especially over 1.45v it tends to get hot and requires very good cooling. So please be careful around those voltages and try not to go over 1.5v when stress testing. thumb.gif Also, from what I ve experienced; cooling VRMs and SouthBridge is a very good idea when overclocking.
post #1563 of 6499
Thread Starter 
Yes this is true about us ! I am mad and extreme like it says in my sig biggrin.gif I will one day soon try for 5.5 ghz or melt it down trying cause i can and i will either way ! aaevil.gif p.s Bart welcome to the OCn ! Enjoy thumb.gif
post #1564 of 6499
Thanks guys, for the entertainment AND the good info. biggrin.gif So far I've been "feeling out" the H100 for temps. The highest temp I've seen so far is 62C, but that's only running with the x43 multiplier and everything on auto. I ran OCCT linpack (with AVX) to hit that temp. Which leads me to a question: is there any chance of seeing thermal throttling at under 70C? I ask because OCCT seems to test in "spurts" where the CPU will redline for a while at 100%, and I hear the H100 fans kick up to rocket ship noise level to compensate, but then the CPU utilization drops off for a minute, and then ramps back up again. This might be normal for OCCT, but I wanted to bounce it off you guys. smile.gif

If I'm not seeing any throttling, then I know I can hit 62C at only 1.28V. My gut tells me that's bad. If I'm hitting 62C at low voltage, I'll probably bust 70C easy by the time I'm approaching 1.4V, and that's not as good as I'd like it to be. I want to know where the limits of this H100 are compared to my previous air coolers (TRUE / Venomous-X).

As for water cooling, I spent 2 hours last night drooling over WC custom build logs. One guy on here (can't remember his name) has some funky blue helix-resovoir thing that creates happy movement in my pants. Knowing myself, if I open THAT door, I'll be bending my wallet over and slapping dat ass. tongue.gif I just blew $1800 on this X79 build, so I can't dump another $500-$700 into a WC loop. Plus, being an old nerd, I have no idea what "entry level" means. biggrin.gif
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post #1565 of 6499
Quote:
Originally Posted by Bart View Post

Thanks guys, for the entertainment AND the good info. biggrin.gif So far I've been "feeling out" the H100 for temps. The highest temp I've seen so far is 62C, but that's only running with the x43 multiplier and everything on auto. I ran OCCT linpack (with AVX) to hit that temp. Which leads me to a question: is there any chance of seeing thermal throttling at under 70C? I ask because OCCT seems to test in "spurts" where the CPU will redline for a while at 100%, and I hear the H100 fans kick up to rocket ship noise level to compensate, but then the CPU utilization drops off for a minute, and then ramps back up again. This might be normal for OCCT, but I wanted to bounce it off you guys. smile.gif

If I'm not seeing any throttling, then I know I can hit 62C at only 1.28V. My gut tells me that's bad. If I'm hitting 62C at low voltage, I'll probably bust 70C easy by the time I'm approaching 1.4V, and that's not as good as I'd like it to be. I want to know where the limits of this H100 are compared to my previous air coolers (TRUE / Venomous-X).

As for water cooling, I spent 2 hours last night drooling over WC custom build logs. One guy on here (can't remember his name) has some funky blue helix-resovoir thing that creates happy movement in my pants. Knowing myself, if I open THAT door, I'll be bending my wallet over and slapping dat ass. tongue.gif I just blew $1800 on this X79 build, so I can't dump another $500-$700 into a WC loop. Plus, being an old nerd, I have no idea what "entry level" means. biggrin.gif

Hey mate, some ppl reported seeing thermal throttling at 70C. Most likely in your Bios settings you must have left thermal throttling enabled too. Try same test by disabling that and let's see whats happening. (I honestly dont know as i have never seen 70C on mine). HOMECINEMA-PC can help you on that becoz he can run stable around 70~80C. Also, you said, u ve left everything at auto, try dropping Vcore more and see if that works. Also could you pls try 125 x 40 and see if chip is going 5000 and beyond (no stress test at all tho). Btw, is your chip CostaRica or Malay? What memory are u running? how many sticks and speed?

Like I said before H100 is a good cooler but not good enough for high clocks for this cpu unless you have very low ambient. Possibly it will cope with temps at 1.40~1.45 as i tried explaining before. H100 will definitely outperform your previous air coolers.

PS: Trust me, You don't have to spend a fortune on water-cooling thumb.gif I am a living proof of that smile.gif
post #1566 of 6499
Quote:
Originally Posted by Bart View Post

Great thread!! Just finished reading pages 100-156. Aside from one troll, great stuff! I learned a lot today, the main lesson being: you OCN guys are bat***** crazy! biggrin.gif I just but my new 3820 rig together (with the infamous burning GA-X79-UD3 motherboard), and I'm looking to get back into the OC game. I've been OCing since the pentium 3 days (old man here), but I'm out of the loop when it comes to new stuff like SB/SB-E. Right now, I've only bumped the multiplier to 43 (no other changes). Didn't do this as an OC, but more to get a baseline on what my new case and cooling is like (CM Storm Trooper, Corsair H100, stock fans/TIM). Plus, I also wanted to see how the auto-voltage works when the CPU is stressed. And yes it does sound like 2 rockets having sex on startup! I think I need some cougars. And some quiet new fans. tongue.gif
So me being an "experienced noob", I have questions that you geniuses might be able to answer:
1) where I can find info on the PCI specs for SB-E? When I OC, I HATE OCing the PCI bus in ANY way, even a little. So I want to know how to keep the PCI bus stock while pushing the CPU. How do you mess with the base clock on these things and keep the PCI bus at stock?
2) why don't more of you use OCCT for stress testing? All I see on this forum is IBT and Prime95. The newest OCCT has temp monitoring, AVX support, linpack, ram stressing, etc, all in one package. What am I missing here? OCCT seems like the perfect tool to me, and you guys are pros, so I know there must be a reason!
3) with the multi set to 43, and everything else auto, the CPU voltage tops out at 1.28V after 8 hours of Linpack testing with OCCT (no AVX since I had no idea what that was until I read this thread). smile.gif Is that voltage good, bad, or average? It sounds a bit low to me, but I'm rusty with OCing and I know NOTHING about SB-E.
Thanks guys!
P.S. HOMECINEMA-PC and X79Extreme7UK are certifiably INSANE!!! You guys are NUTS!! tongue.gif

This thread has amazed me. I started it to share my findings on a new chip and it has grown into this! Amazing. smile.gif
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post #1567 of 6499
Quote:
This thread has amazed me. I started it to share my findings on a new chip and it has grown into this! Amazing. smile.gif

You ve done a good job by starting this thread thumb.gif
Thanks smile.gif
post #1568 of 6499
Quote:
Originally Posted by X79Extreme7UK View Post

Hey mate, some ppl reported seeing thermal throttling at 70C. Most likely in your Bios settings you must have left thermal throttling enabled too. Try same test by disabling that and let's see whats happening. (I honestly dont know as i have never seen 70C on mine). HOMECINEMA-PC can help you on that becoz he can run stable around 70~80C. Also, you said, u ve left everything at auto, try dropping Vcore more and see if that works. Also could you pls try 125 x 40 and see if chip is going 5000 and beyond (no stress test at all tho). Btw, is your chip CostaRica or Malay? What memory are u running? how many sticks and speed?
Like I said before H100 is a good cooler but not good enough for high clocks for this cpu unless you have very low ambient. Possibly it will cope with temps at 1.40~1.45 as i tried explaining before. H100 will definitely outperform your previous air coolers.
PS: Trust me, You don't have to spend a fortune on water-cooling thumb.gif I am a living proof of that smile.gif

I'm honestly not sure about my CPU. I'll post the serial numbers when I get home from work. My memory is quad channel El Cheapo CL11 G.Skill stuff (updated sig with new rig). I didn't plan on OCing the memory, and since x79 is quad channel already, I figured spending double the $$$ on higher performing CL9 stuff wasn't worth it to me. Generally, I only OC the CPU (crazy I know), and I leave the memory / GPU / PCI alone. I just buy XMP RAM, set it up for the highest performing XMP profile, and leave it at that.

Also, when I said I left everything on AUTO, I meant CPU voltage too. smile.gif I was just curious to see what the AUTO setting would do with the voltage under stress. Now that I see AUTO is using 1.28V for 4.3Ghz under full load, I think I can *reasonably* assume that I should be able to set that even lower at this clock speed. So I'll use 1.28V as my starting point when I start messing around with the BCLK. I'm not nuts like you 2, so I'll be happy with less than 5Ghz. biggrin.gif But 5 is a nice round number to shoot for. God help me if I get into folding!!

Definitely going to be messing around tonight in the BIOS, if I have time. I still need to prep my old system for sale to recoup some of the $$$ I just wasted on this rig. biggrin.gif

EDIT: cpu is made in Costa Rica, S-spec=SR0LD, Batch#: 3208C321, S/N: 2V207081A1912. I assume the Malaysian ones are the good ones, knowing my luck. smile.gif
Edited by Bart - 11/27/12 at 1:56pm
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post #1569 of 6499
Thread Starter 
Hey criminal , This thread has more action on it than the SB-E owners club , Its a bummer u dont have a Leaderboard , but thanks for starting this thread ive had a lot of fun here and i will contribute more all i need is to be asked , Its all good mate cheers......thumb.gif
post #1570 of 6499
Quote:
Originally Posted by Bart View Post

1) where I can find info on the PCI specs for SB-E? When I OC, I HATE OCing the PCI bus in ANY way, even a little. So I want to know how to keep the PCI bus stock while pushing the CPU. How do you mess with the base clock on these things and keep the PCI bus at stock?
You should use CPU Strap when overclocking 3820. CPU has 4 straps; 100, 125, 167, 250 where 1:1, 1:1.25, 1:1.67, 1:2.5 respectively. For example, if CPU Strap is set to 125 & multiplier to 38, this will give you 4.75GHz OC. When you set CPU Strap to 125, 125MHz is given to CPU while PCIe/DMI controller get 100MHz. The equation is like this (example):-

BCLK = 125MHz, CPU Strap = 125, PCIe/DMI = 125 / 1.25 = 100MHz
BCLK = 127MHz, CPU Strap = 125, PCIe/DMI = 127 / 1.25 = 101.6MHz

I don't know your UEFI BIOS settings look like but no need to set BCLK, just the Strap. On my motherboard, when setting Strap to 125, BCLK will automatically set to 125MHz (see first equation).
Quote:
Originally Posted by Bart View Post

Thanks guys, for the entertainment AND the good info. biggrin.gif So far I've been "feeling out" the H100 for temps. The highest temp I've seen so far is 62C, but that's only running with the x43 multiplier and everything on auto. I ran OCCT linpack (with AVX) to hit that temp. Which leads me to a question: is there any chance of seeing thermal throttling at under 70C? I ask because OCCT seems to test in "spurts" where the CPU will redline for a while at 100%, and I hear the H100 fans kick up to rocket ship noise level to compensate, but then the CPU utilization drops off for a minute, and then ramps back up again. This might be normal for OCCT, but I wanted to bounce it off you guys. smile.gif
If I'm not seeing any throttling, then I know I can hit 62C at only 1.28V. My gut tells me that's bad. If I'm hitting 62C at low voltage, I'll probably bust 70C easy by the time I'm approaching 1.4V, and that's not as good as I'd like it to be. I want to know where the limits of this H100 are compared to my previous air coolers (TRUE / Venomous-X).
With IBT or P95 or BOINC, with 4.5GHz & H100, in 31 - 35C ambient, I got 74 - 77C max core temps. I didn't experienced any thermal throttling at all. 62C when gaming (BF3). Of course the temps go down a lot when AC is on. LOL. The air flow in the case also important because even CPU doesn't run hot, it still can throttling if VRM is overheating.

The stock H100 fans are noisy but they have high static pressure & high air flow. They are good fans. But if it annoying you, you can always swap it with silent fans like Cougar Vortex fans.
Edited by kizwan - 11/27/12 at 5:26pm
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