Increasing BCLK increase base or turbo frequency?

[Khader87]

Hi, 

 

i have i7 9700 with base clock of 3.00ghz and turbo at 4.7ghz on one core and 4.4ghz on all 8 cores, 

 

changing BCLK to lets say max allowed of 102.9, this will effect single turbo or all core turbo, how is it calculated? i still didnt get the z390, just asking to know. 

 

 

thanks. 

[Jurrunio]

Both, all.

[SkilledRebuilds]

Affects ALL CPU bins.

Be it Single, Multicore..

Watch RAMSPEEDS too...

 

Careful of USB ports dying within a year..

Ive had some history with BCLK on Gen4

 

[Khader87]

1 minute ago, SkilledRebuilds said:

Affects ALL CPU bins.

Be it Single, Multicore..

Watch RAMSPEEDS too...

 

Careful of USB ports dying within a year..

Ive had some history with BCLK on Gen4

 

i read that new intel gen, increasing BCLK will not affect PCIE lanes

[Khader87]

3 minutes ago, SkilledRebuilds said:

Affects ALL CPU bins.

Be it Single, Multicore..

Watch RAMSPEEDS too...

 

Careful of USB ports dying within a year..

Ive had some history with BCLK on Gen4

 

it will be 4.4ghz x 102?

or 4.7ghz x 102?

[Jurrunio]

2 minutes ago, Khader87 said:

i read that new intel gen, increasing BCLK will not affect PCIE lanes

oh yes they do. Ever since north bridge got integrated into the CPU, they do.

[Khader87]

2 minutes ago, Jurrunio said:

oh yes they do. Ever since north bridge got integrated into the CPU, they do.

so their is a risk of killing the motherboard if BCLK increased? 

[Jurrunio]

6 minutes ago, Khader87 said:

so their is a risk of killing the motherboard if BCLK increased? 

nah it wont. From my experience with an even older system (still limited BCLK) the "dead" USB ports come back after running with lower BCLK for a while.

[Khader87]

4 minutes ago, Jurrunio said:

nah it wont. From my experience with an even older system (still limited BCLK) the "dead" USB ports come back after running with lower BCLK for a while.

another question plz. can i run turbo boost 4.7 on all cores using z motherboard on non k CPU? 

[Jurrunio]

1 minute ago, Khader87 said:

another question plz. can i run turbo boost 4.7 on all cores using z motherboard on non k CPU? 

Yes

[Xkillerpn]

nvme does not like bclk oc, be just carefull with that.

[DoctorNick]

Multipliers. CPU: 44x102,9 = 4.5276ghz , 47x102,9 = 4.836ghz 

Same goes for memory so 3200 is 32x, 32x102.9 = 3292mhz

[Princess Luna]

6 hours ago, Jurrunio said:

oh yes they do. Ever since north bridge got integrated into the CPU, they do.

Base clock is no longer tied to PCI-e bus frequency ever since Skylake, so you're wrong since OP has Coffee Lake Refresh.

[Princess Luna]

6 hours ago, SkilledRebuilds said:

Careful of USB ports dying within a year..

Ive had some history with BCLK on Gen4

USB, PCI-e and everything else no longer is tied to base clock since Skylake so this is no longer an issue, only CPU and Memory is tied nowadays.

 

The only down side is how on Kaby Lake onwards Intel added a micro-code that prevents boot if your base clock is any higher than the 102.98 margin, since back on Skylake it became mainstream to buy the i5 6400 and i7 6700 and overclock those instead for cheaper costs.

 

As we all know Intel makes product segmentation "artificially"

[Jurrunio]

4 hours ago, Princess Luna said:

Base clock is no longer tied to PCI-e bus frequency ever since Skylake, so you're wrong since OP has Coffee Lake Refresh.

Yes they are. Notice how many Z170 boards come with external clock gens for non-K overclocking support, they don't need that if PCIe is based on a different frequency. Otherwise your non-K CPUs won't be stuck below 110MHz BCLK

[Falkentyne]

Sorry, Jurrunio, but you're wrong here.

The BCLK on Skylake and newer are no longer tied to PCIE or DMI anymore.  PCIE will always use a reference clock of 100 mhz regardless of your BCLK.  (Note: I have no idea how this relates to *System agent clock* (FCLK), keep that in mind.

 

Saw someone running a NVMe drive at 141 BCLK for a month with an i5 6500 and no problems.  This would not be possible otherwise.

Main problem is RAM stability.

 

I think that "external clock gen" is precisely for bypassing that firmware issue of 102.98 mhz.

There are also settings in some bioses for "BCLK aware adaptive voltage."

 

How do you think WR holders are pushing 180 BCLK these days?

 

https://www.techpowerup.com/forums/threads/is-bclk-linked-to-dram-frequency-on-6700k.215665/