Sandybridge Intel i7-2700K & i7-2600K

[bulldog147]

I can't remember what the safe max temperature on cpu package and safe max temperature on cpu? Also safe max vcore voltage? Does anyone know this?

I brought this from overclockers in 2009.

 

[bulldog147]

Ok I ran Prime95 stress for an hour as stock @ 3.6GHz at 1.200 vcore with max temp reading Core 0 62C Core 1 63C Core 2 64C Core 3 59C with CPU at 47C with two fans spin at between 706RPM and 940RPM as the room temp are 30C as motherboard and pch reading at 50C max.

My case is this one: https://www.overclockers.co.uk/koli...se-white-tempered-glass-window-ca-03c-kk.html

My air cooler is
SilverArrow SB-E with two fans with
Thermal Grizzly Kryonaut 12.5 W / m · K 1 g thermal grease as a pea size


No graphic card (using cpu gpu)

 

[bulldog147]

It didn't ran at 3.9GHz as it only ran 3.6GHz when doing full stress test. The bios is all on auto default
https://valid.x86.fr/8dp4a5

 

[bulldog147]

I checking temp on stock speed first then will try overclock it at 4.2GHz (don't think I don't want to risk 4.8GHz at 1.4v with max temp at 80C on all cores!)

 

[bulldog147]

Are you trying to overclock or just checking temps ?

https://valid.x86.fr/wikm81

Running 4.4GHz at 1.35v will run full stress test hope the temp isn't go over 80C in all cores

 

[bulldog147]

4.4GHz at max temp 70c after 30 mins stress test at 1.356v on all auto setting just multiplier to 44 with no problem

Will try push it at 4.5GHz see if it stable on all auto setting just multiplier to 45.

What is best stress test to do it?

Why is Core 3 always the lower temp by -5C?

 

[bulldog147]

4.5 is generally easy for most Sandies. My 2500K did it for its entire lifetime* on (iirc) 1.32v without a problem. Usually just leave all other settings on Auto, set multiplier to 45 and reboot.
See what voltage the chip gets on Auto, then try chipping it down to reduce temps.

Thanks for tip. I can see your spec nice AMD Ryzen 5800X with great memory timing 3600MHz at C15 32GB ram. I just unlucky on my Ryzen 4750G with 2133MHz become unstable with Asus Tuf Gaming B550 Plus. Took it back for full refund. I am now saving up for a better AMD Ryzen later in the year maybe go for 5700G.

Updated: just boot up successful and passed cinebench multithreads on 4.5GHz at 1.356v at 72C
https://valid.x86.fr/v4rg36

 

[bulldog147]

Managed passed my 4.8GHz @ 1.38v with max temp at 75C on all cores. Very impressive with this great sandybridge chip. I can try 5GHz but I rather leave it as 4.5GHz at 1.356v with max temp of 70C for 24/7/365

 

[bulldog147]

That looks like a good chip! People used to go up to 1.50v for 5ghz. I had my 2500k at 1.45v for years on a dark rock pro cooler. As others have said, an overclockers dream

Yes wish this sandybridge support PCIE 3.0, USB 3.1, Type C, NVMe slot, 8 cores 16 threads and DDR4 Ram in our dream, because if it does ticked it all, I would stay with Sandybridge for as long it take!

 

[bulldog147]

I did notice AMD Ryzen was crazy start off with 1.4v as a stock speed. Intel never do this way. Why would AMD Ryzen pushed too far with 1.4v are they try to stop peoples overclocking it?

 

[bulldog147]

Here is my Sandybridge i7-2700K @ 4.5GHz

 

[bulldog147]

I'm currently running my SB 2700k @4.7Ghz with 1.3661v.
I'll be upgrading shortly but will keep it as I cannot get rid of it. It has served me well for nearly 10 years.

That's pretty great chip u got there

 

[bulldog147]

My 4.8GHz seem very stable when full load it reduced vcore to 1.344v with max temp no more than 65C on all cores. Ran Cinebench both R20 and R23. Ran prime95 stress for 30 minutes and intel in burn test for 10 minutes all seem stable. Happy overall.

Cpu-z: https://valid.x86.fr/w4f0a9

Results:

Cinebench R23:
Multicore 4432 points
Singlecore 919 points

Cinebench R20:
Multicore 1734 points
Singlecore 355 points

 

[bulldog147]

IMHO, I don't think ~1.35 V is really safe for Sandybridge chips. However the word safe needs some context. It depends how long you want it to last.

In the very long term it does degrade. I ran a 2700k at 4.7GHz 1.34 V for around 10 years before moving to a 5950X a couple of months ago. In the last year to 18 months the 2700k was notably degrading. The once flawless chip would start to see a few BSODs here and then. A slight nudge up of vcore would fix them for a few more months, then they'd come back. By the time I pulled the system I had vcore up to 1.37 V to remain stable. Still ok-ish, but it's clear the CPU was past it's better days. If I ever put it back into service I'll almost certainly have to drop the clocks a little to feel comfortable.

So if you want it to last 'forever' I'd stay below 1.3 V, if you just want a couple more years from it, then it's probably fine.

Nonsense! Intel stated: max safe vcore for sandybridge chips of 1.38v, technical documents from Intel state a max vcore of 1.425v is absolutely safe