i7 3820 Max Vcore?

estebanrey · 11 Apr 2012 at 23:17

paradigm said:
Actually, the latest Xeon is typically no faster (usually slower) than the high-end enthusiast part.

They are however cherry-picked for stability and can contain more cache.

Faster and slower can be ambiguous, let's just say they have the highest Cinebench score.

paradigm · 12 Apr 2012 at 07:30

estebanrey said:
Cheers, would appreciate that. I've basically just copied all the settings the guy recommends in this video....

...and then tweaking with the multiplier, vcore voltage and Dram settings.

P.S Managed to get 4.7Ghz @ 1.41v

Well, half of these are from memory (as I only have half of it written down in my notepad!), but:

AI Tuner Settings

AI OC Tuner: Manual
BCLK: 125
CPU Strap: 125
CPU Clock Gen Filter: Enabled
CPU Core Voltage: 1.410v
Multiplier (All Cores): 40

Digi+ Settings

Load Line Calibration: High
CPU Current Capability: 130%
VCCSA LLC: Regular
VCCSA Current Capability: 120%

CPU Voltage Frequency: Auto
Spread Spectrum: Disabled

CPU Power Duty: Extreme
CPU Power Phase: Extreme

DRAM Frequency: Optimized
DRAM Current Capability: 120%

estebanrey · 12 Apr 2012 at 08:07

Thanks paradigm!

I'll have a play later...

estebanrey · 12 Apr 2012 at 20:32

paradigm said:
Well, half of these are from memory (as I only have half of it written down in my notepad!), but:

AI Tuner Settings

AI OC Tuner: Manual
BCLK: 125
CPU Strap: 125
CPU Clock Gen Filter: Enabled
CPU Core Voltage: 1.410v
Multiplier (All Cores): 40

Digi+ Settings

Load Line Calibration: High
CPU Current Capability: 130%
VCCSA LLC: Regular
VCCSA Current Capability: 120%

CPU Voltage Frequency: Auto
Spread Spectrum: Disabled

CPU Power Duty: Extreme
CPU Power Phase: Extreme

DRAM Frequency: Optimized
DRAM Current Capability: 120%

No luck I'm afraid, wouldn't even boot. I had to up the voltage again in which it did boot but then failed IBt after a few minutes.

Starting to think maybe my 'wall' is lower than yours :mad:

paradigm · 12 Apr 2012 at 23:11

Try changing CPU Voltage frequency off Auto, and up your VCCSA CC to 130%.

paradigm · 15 Apr 2012 at 14:16

1.425v core (in BIOS), 5GHz

That's as low as I can get the vCore and keep it stable. Sits at 32c idle and loads around 60c.

http://valid.canardpc.com/show_oc.php?id=2332561

On Holiday · 8 Jul 2012 at 21:42

paradigm said:
1.425v core (in BIOS), 5GHz

That's as low as I can get the vCore and keep it stable. Sits at 32c idle and loads around 60c.

http://valid.canardpc.com/show_oc.php?id=2332561

Old thread, hoping you see this; what cooling do you use?

bemaniac · 9 Jul 2012 at 09:29

hmm I'll probably try downing my voltage from 1.5 to 1.46 or something, seems to be doable. Then again 1.5 isn't likely to kill my chip and the temps are acceptable.

8 Pack · 9 Jul 2012 at 22:41

Mine is 5.240ghz stable with less than 1.48v. Keep your VCCSA and VTT under control though and I would not worry about degradation these C2 degrade with high VCCSA and VTT it seems over time.

Those Ripjaws can do better than that though!!!

paradigm · 10 Jul 2012 at 12:34

YarwoodUK said:
Old thread, hoping you see this; what cooling do you use?

It's a custom watercooling loop, mainly comprising of an EK DCP 4.0 pump, EK 360XTX radiator, and the CPU block is an EK Supreme HF.

On Holiday · 11 Jul 2012 at 07:31

Thanks for the reply, so it's basically this?;

http://www.overclockers.co.uk/showproduct.php?prodid=WC-173-EK&groupid=962&catid=1532&subcat=

gareth170 · 11 Jul 2012 at 10:27

paradigm said:
As I said earlier in the thread, mine will do 5GHz at 1.41v, so 1.48v is HIGH!

every cpu clocks differently.. just because yours does 5GHz at 1.41v, doesn't mean another chip will.

8 Pack · 11 Jul 2012 at 10:40

gareth170 said:
every cpu clocks differently.. just because yours does 5GHz at 1.41v, doesn't mean another chip will.

Thats correct every CPU is different no doubt. Even CPU in the same batch are different these days.

paradigm · 11 Jul 2012 at 11:09

gareth170 said:
every cpu clocks differently.. just because yours does 5GHz at 1.41v, doesn't mean another chip will.

1.48v is high full stop for an SB-E, watercooling or no watercooling.

gareth170 · 11 Jul 2012 at 11:20

paradigm said:
1.48v is high full stop for an SB-E, watercooling or no watercooling.

but it's how u said it

wissel · 31 Jul 2012 at 00:57

Just found this thread.

Trying my first clock on a 3820 and just wondered if these figures seem ok?

4.75ghz (125x38) @1.36v (bios) max 69 degrees after running prime for a couple of hours

I did try 5ghz @1.41v which was running fine as well (max temp mid 70's after an hour or so prime) but clocked it down as I didn't know if 1.41v was to high?

Any help really appreciated.

Yaayuh! · 31 Jul 2012 at 08:36

estebanrey said:
My 3820 @ 4.8Ghz stable with RAM at full speed (2133Mhz 9-11-10-282)

tRFC @ 183?? Come on now, get that down to at least 114 surely?

F4810 · 15 Jan 2014 at 16:52

Hi All

I just upgraded my GPUs on my X79-UD3 and i7 3820 combo. I had to update the BIOS too in order to run them. Previously I ran an OC at about 4500 MHz and had no problems for years. Since the BIOS update I can't seem to get any OC. When I change the strap to 1.25 like I did before (even if I lower the memory speed to lower than they should run at and lower the overall CPU speed to lower that its stock setting) I can get it to boot but its keeps crashing. Any idea what I am doing wrong or what setting I am missing?

Its been so long since I did the OC in the first place that I cant recall.

Many Thanks

OLDPHART · 15 Jan 2014 at 17:00

Hi,, just built a x79 Asus x79 DLX > 4.6ghz 1.36v in the bios > CPU-Z:1.344V but will only do 4.810GB at 1.5v.

Running at 4.6GB 24/7 more than happy at this with good temps and stable.

OLDPHART · 15 Jan 2014 at 18:54

24/7 4.6GHZ CPU-Z:1.360 but when running IBT drops to 1.344v, HWMonitor reports this as minimum value 1.344v Screen Shot -