How does XFR works ?

[moking01]

Hey guys,

 

So I'm abit confused regarding how XFR actually works. Does it boost a single core at a time under all circumstances or does it boost a single core and if the load requires it boosts another core ?

Say I'm rendering a video on Premier and the software encoder requires more CPU horsepower so XFR will boost a core to its maximum limit respecting the cooling limitations, what if Premier would like to make use of more CPU power ? Does XFR boost more cores at a time ?

 

[unknownmiscreant]

22 minutes ago, moking01 said:

Hey guys,

 

So I'm abit confused regarding how XFR actually works. Does it boost a single core at a time under all circumstances or does it boost a single core and if the load requires it boosts another core ?

Say I'm rendering a video on Premier and the software encoder requires more CPU horsepower so XFR will boost a core to its maximum limit respecting the cooling limitations, what if Premier would like to make use of more CPU power ? Does XFR boost more cores at a time ?

 

As far as I under stand it, XFR only boosts one core at a time when only one core is in use and thermals are sufficient. I never got it to work, and overclocked instead.

XFR will never boost a core when doing premiere video encoding (or similar,) as more than one core is in use.

[moking01]

Just now, unknownmiscreant said:

As far as I under stand it, XFR only boosts one core at a time when only one core is in use and thermals are sufficient. I never got it to work, and overclocked instead.

XFR will never boost a core when doing premiere video encoding (or similar,) as more than one core is in use.

I oc'ed as well. I just wanna understand how it works. Adobe Premier was just an example....i mean, if for whatever reason more CPU power needs to be utilized does XFR help with that or it never goes beyond a single core ?

[unknownmiscreant]

Just now, moking01 said:

I oc'ed as well. I just wanna understand how it works. Adobe Premier was just an example....i mean, if for whatever reason more CPU power needs to be utilized does XFR help with that or it never goes beyond a single core ?

XFR only works for single core utilisation. Anything more and the processor just uses precision boost. I never really got to the bottom of it either, as my 1700x was rated for up to 3.5Ghz (ish) with XFR on one core. I have all 8 cores running at 4GHz with OC.

[moking01]

12 minutes ago, unknownmiscreant said:

XFR only works for single core utilisation. Anything more and the processor just uses precision boost. I never really got to the bottom of it either, as my 1700x was rated for up to 3.5Ghz (ish) with XFR on one core. I have all 8 cores running at 4GHz with OC.

So the difference between precision boost and XFR is that precision can oc more than one core, am i getting that right ?

[unknownmiscreant]

9 minutes ago, moking01 said:

So the difference between precision boost and XFR is that precision can oc more than one core, am i getting that right ?

Precision boost boosts all the cores, irrespective of load, but XFR is an additional boost on top of precision boost to get a bit more out of the CPU for single core workloads. So yeah, you are basically getting that right. But all the precision boost + XFR is disabled in OC mode anyway.