Sign in with
Sign up | Sign in
Your question

Vcore on an i7-3820

Last response: in Overclocking
Share
November 11, 2012 9:02:44 PM

Hey everyone,

I have a question about the Vcore on my i7-3820. Currently I'm running it at ~ 4 GHz (103 MHz * 39) with a Vcore of 1.26 V. I'm not concerned with going over 4 GHz, but I would like to know if the Vcore is aggressive for that frequency, since that frequency is barely above the stock setting of 3.8 GHz (100 MHz * 38). I honestly don't know what the stock Vcore is for that processor. I have a stable frequency (Prime95 for 16+ hours), so I don't want to go through the process of lowering my Vcore incrementally and finding the minimum stable Vcore if 1.26 V is generally considered about right for 4 GHz.

Build:
Asus P9X79 mobo
core i7-3820
16 GB corsair vengence ram
EVGA GTX 670 FTW
Cooler Master Silent Pro Gold 1000W PSU
LG DVD burner
NZXT switch 810 case
7200 RPM 2 TB HDD (no SSD)

Thanks,
naihan

More about : vcore 3820

November 13, 2012 4:34:33 PM

Forgot to mention, temps rarely exceed 51 C while gaming
m
0
l
March 31, 2013 12:28:09 AM

naihan said:
Hey everyone,

I have a question about the Vcore on my i7-3820. Currently I'm running it at ~ 4 GHz (103 MHz * 39) with a Vcore of 1.26 V. I'm not concerned with going over 4 GHz, but I would like to know if the Vcore is aggressive for that frequency, since that frequency is barely above the stock setting of 3.8 GHz (100 MHz * 38). I honestly don't know what the stock Vcore is for that processor. I have a stable frequency (Prime95 for 16+ hours), so I don't want to go through the process of lowering my Vcore incrementally and finding the minimum stable Vcore if 1.26 V is generally considered about right for 4 GHz.

Build:
Asus P9X79 mobo
core i7-3820
16 GB corsair vengence ram
EVGA GTX 670 FTW
Cooler Master Silent Pro Gold 1000W PSU
LG DVD burner
NZXT switch 810 case
7200 RPM 2 TB HDD (no SSD)

Thanks,
naihan


Stock setting is not 3.8 its 3.6. I'm running the same cpu at 4.3 (43x) at 1.28v. I don't know why you'd mess with the bclck if you want 43 or less. Your voltage is fine, but you should not raise the bclck if you're only going up to 4.3 or less.
m
0
l
Related resources
March 31, 2013 12:28:10 AM

naihan said:
Hey everyone,

I have a question about the Vcore on my i7-3820. Currently I'm running it at ~ 4 GHz (103 MHz * 39) with a Vcore of 1.26 V. I'm not concerned with going over 4 GHz, but I would like to know if the Vcore is aggressive for that frequency, since that frequency is barely above the stock setting of 3.8 GHz (100 MHz * 38). I honestly don't know what the stock Vcore is for that processor. I have a stable frequency (Prime95 for 16+ hours), so I don't want to go through the process of lowering my Vcore incrementally and finding the minimum stable Vcore if 1.26 V is generally considered about right for 4 GHz.

Build:
Asus P9X79 mobo
core i7-3820
16 GB corsair vengence ram
EVGA GTX 670 FTW
Cooler Master Silent Pro Gold 1000W PSU
LG DVD burner
NZXT switch 810 case
7200 RPM 2 TB HDD (no SSD)

Thanks,
naihan


Stock setting is not 3.8 its 3.6. I'm running the same cpu at 4.3 (43x) at 1.28v. I don't know why you'd mess with the bclck if you want 43 or less. Your voltage is fine, but you should not raise the bclck if you're only going up to 4.3 or less.
m
0
l
March 31, 2013 12:28:10 AM

naihan said:
Hey everyone,

I have a question about the Vcore on my i7-3820. Currently I'm running it at ~ 4 GHz (103 MHz * 39) with a Vcore of 1.26 V. I'm not concerned with going over 4 GHz, but I would like to know if the Vcore is aggressive for that frequency, since that frequency is barely above the stock setting of 3.8 GHz (100 MHz * 38). I honestly don't know what the stock Vcore is for that processor. I have a stable frequency (Prime95 for 16+ hours), so I don't want to go through the process of lowering my Vcore incrementally and finding the minimum stable Vcore if 1.26 V is generally considered about right for 4 GHz.

Build:
Asus P9X79 mobo
core i7-3820
16 GB corsair vengence ram
EVGA GTX 670 FTW
Cooler Master Silent Pro Gold 1000W PSU
LG DVD burner
NZXT switch 810 case
7200 RPM 2 TB HDD (no SSD)

Thanks,
naihan


Stock setting is not 3.8 its 3.6. I'm running the same cpu at 4.3 (43x) at 1.28v. I don't know why you'd mess with the bclck if you want 43 or less. Your voltage is fine, but you should not raise the bclck if you're only going up to 4.3 or less.
m
0
l
March 31, 2013 12:27:43 PM

I'm still trying to figure out why it posted my answer three times and how to remove 2 of em lol.
m
0
l
March 31, 2013 8:24:55 PM

Having this thread necroed reminded me that I planned on actually overclocking this thing. Again, nothing too aggressive, just a little something with no excess voltage put on the chip. Right now I'm doing 4.3 GHz @ 1.220 V. Prime95 small FFT has been running for over 4 hours now, so we'll see if this config turns out to be stable.
m
0
l
March 31, 2013 9:37:56 PM

You should use large in place fft's. Better test. From what I'm seeing, it does vary from chip to chip, but mine runs most stable at around 1.28v. If you think about it, this sounds about right since 3.6ghz is 1.2v so to add .7 gHz more will require considerably more voltage than stock. IMHO, 1.22v will be too low, as I've tried it and it didn't work so well. Looking around on the web at other people oc's, 1.26-1.28 is well within safe range and seems to be what most of these chips need at 4.3 ghz. I had mine running at 4.3ghz and 1.3v and it was just fine there too, but it seems to do much better at 1.28 with less heat. Let me know what you find. Oh and also, seriously, don't mess with the bclck, just raise the multi to 43. You can use xmp profiles for memory that way and its way easier.
m
0
l
May 3, 2013 10:31:43 PM

I ended up with a mild stable overclock of 4.3 GHz (43*100MHz) @ 1.245 V. Passed 24 hours of Prime95 small FFTs. I use small FFTs because large FFTs can't fit in the CPUs cache, so they all get stored in the memory. Small FFTs utilizes more of the CPUs components, while I rely on memtest86+ for memory testing.
m
0
l
May 4, 2013 9:11:39 AM

naihan said:
I ended up with a mild stable overclock of 4.3 GHz (43*100MHz) @ 1.245 V. Passed 24 hours of Prime95 small FFTs. I use small FFTs because large FFTs can't fit in the CPUs cache, so they all get stored in the memory. Small FFTs utilizes more of the CPUs components, while I rely on memtest86+ for memory testing.


Use Intel Burn Test instead. It's way faster and far better than Prime 95.
m
0
l
!