Can't overclock when changing cpu strap or bclk, asus sabertooth x79 & i7 3820

[xelement]

Hi, i have a problem, whenever i change either bclk or the cpu strap from 100 to 125 for example , it waits 5 minutes at the "press del to enter the bios" screen and then loads windows, it's stable and all but waiting that long is just ridiculous. changing the multiplier to 44 and just have the bclk and cpu strap at 100 it works, this gives me a 4.4ghz oc but i want more

even if i set the multiplier at 34 and the cpu strap at 125 giving me a 4.25ghz oc it still waits 5min at the "press del to enter the bios" screen. i'm giving the cpu 1.3v i also change the ram to 1333mhz when changing the bclk and cpu strap so thats not the cause, not the volt i've tried giving it more, but it doesnt help. I Hope someone can help me because i have no idea why it won't overclock on the bclk or cpu strap :/ Thanks.

 

[tinytomlogan]

Its your cpu stopping you NOT the board.

Just work with the multiplier till you learn a bit more

 

[xelement]

Its your cpu stopping you NOT the board.

Just work with the multiplier till you learn a bit more

Hmm, ok well the multiplier stops at 44 giving me a 4.4ghz oc, but i want more and i just tried with the cpu strap at 125 and the multiplier at 29 i think, giving me 3625 mhz which is stock clock, and it still takes forever to post ;s

 

[VengeanceUK]

try cpu x44 with a lower blk, most nowardays don't like pushing beyond 110 blk, some won't even get that far

 

[xelement]

try cpu x44 with a lower blk, most nowardays don't like pushing beyond 110 blk, some won't even get that far

i tried with the multiplier at 44 and the blk at 101, no luck... but i actually got it to 4.8 with 125 cpu strap and the multiplier at 39, just took 5mins to post.. was stable too after 1hr of prime95

i can get it to 4.4ghz with the bclk at 100 and the multiplier at 44, but if i touch the bclk it takes ages to post.. really weird

 

[Ru5ty_t00l]

a change on the bclk even a tiny one affects too many parameters/things on your board , especially the northbridge. . it means that u must do many changes at the options in order to get a stable o/c and u can't push it too far cause u will burn your motherboard

 

[Jeff_s510]

What CPU / MB are you useing?

 

[Josh Weston]

What CPU / MB are you useing?

Title: Can't overclock when changing cpu strap or bclk, asus sabertooth x79 & i7 3820

 

[xelement]

a change on the bclk even a tiny one affects too many parameters/things on your board , especially the northbridge. . it means that u must do many changes at the options in order to get a stable o/c and u can't push it too far cause u will burn your motherboard

hm, i've seen others change the cpu strap to 125 easily and oc from there, but i don't know

 

[VengeanceUK]

isn't there issues with SB-e and overclocking in some cases?

 

[Vaprizer]

I wouldnt touch that bclk.
Max 110 as vengeance mentioned.
Not sure about sb-e, but normal sandy is definately a no go for upping bclk more than 5-10MHz. Because it affects to so many other things, as ram speed, pci-e frequency etc.
Are you sure the other peeps you have seen changing the bus speed are not running AMD platform? Or older intel, like haswell?
Still I wouldnt overclock bus for 24/7 use.

E: It seems you can do something with straps.
You should check this out http://www.overclock.net/t/1189242/...anations-and-support-for-all-x79-overclockers

 

[Master&Puppet]

The 3820 is different, the multiplier is not unlocked so you have to adjust the bclk. 125 is the sweet spot but you do need to adjust other things like people have said.

RAM in particular will make your system unstable so underclock it. For example:

If you have 1866MHz RAM set at 1866 in bios with 100bclk then everything works great.
Set it at 1866 with 125blck and the RAM is trying to run at (1866*1.25) 2333. RAM won't work because the system is trying to run it too fast.

So... set the 1866 RAM to run at 1333 with the 125bclk it will now run at (1333*125) 1666 which is within its speed range so all working nice and sexy.

 

[xelement]

The 3820 is different, the multiplier is not unlocked so you have to adjust the bclk. 125 is the sweet spot but you do need to adjust other things like people have said.

RAM in particular will make your system unstable so underclock it. For example:

If you have 1866MHz RAM set at 1866 in bios with 100bclk then everything works great.
Set it at 1866 with 125blck and the RAM is trying to run at (1866*1.25) 2333. RAM won't work because the system is trying to run it too fast.

So... set the 1866 RAM to run at 1333 with the 125bclk it will now run at (1333*125) 1666 which is within its speed range so all working nice and sexy.

Thanks! i put the memory to 1000mhz and it booted just fine, running 5ghz at 1.4v and max temps around 73 c but i have a slight problem though, the memory i have is 16gb 4x4 1600mhz kit, but it will only run on 1333mhz max, tried tweaking the timings but no luck :/ got any idea?

 

[tinytomlogan]

Thanks! i put the memory to 1000mhz and it booted just fine, running 5ghz at 1.4v and max temps around 73 c but i have a slight problem though, the memory i have is 16gb 4x4 1600mhz kit, but it will only run on 1333mhz max, tried tweaking the timings but no luck :/ got any idea?

Chipset and IMC volts maybe...? If you are just changing the Vcore thats why it wont run higher son.

 

[xelement]

Chipset and IMC volts maybe...? If you are just changing the Vcore thats why it wont run higher son.

even at stock settings the ram wouldnt run at 1600mhz

 

[kilobravo]

Which dimm-slots have you put the ram in?

 

[Master&Puppet]

You can try bumping the RAM volts to stabalise but at the end of the day it's not worth pushing too hard. What RAM have you got?

Always better to sacrifice RAM speed to get a better CPU clock.