Maximum CPU Cache Ratio made a huge difference

[DosTheBoss]

I was seeing bad scores for a DDR4 memory and at the xmp and i was trying to find why
I couldn't find a solution as long as i searched, that doesn't mean i search everything.
So i changed the max cpu ratio to match the multi of the cpu so the NB clock matches the core clock.
The results are surprising especially the write.

Minimum 24 and Maximum 24 set by default.


Minimum 24 and Maximum 37 set with volt on auto


A full set of tests on Aida 64


Anyone else that played with cache ratio and if some results.

[Praz]

Hello

Yes, cache speed has an impact om memory performance at higher memory speeds. However, there are few applications that will take advantage of this increased bandwidth. It is normally better to prioritize stability and cache voltage before maximum speed.

[Arne_Saknussemm]

Yes! Cache makes a huge difference for AIDA and some other RAM benchmarks like MaxxMEM 😄

[DosTheBoss]

Arne Saknussemm how much volts for cache?

[Arne_Saknussemm]

That's 1.33v but the CPU is a good one...apparenly its quite difficult to even get to 4600 at any volts so you have a good chip too :cool:

[DosTheBoss]

Yea i guess so, asking around some friends with haswells haven't heard anyone getting to that clocks on cache.
I just test now how low the volts can be stable.

Tnx for the reply.

[RIacobo]

Out of curiosity... what is your LLC/Ring voltages hitting with these settings? I'm running 1.279 vcore with a 127 Bclk and 35 mult, ram is oc'd DDR4 2800(North bridge is slightly faster then cpu: NB 4582MHZ, and CPU 4460 MHZ). My LLC/Ring coltage is hitting 1.587 which is a little concerning. Have it set to auto, and if I drop it down manually to match vcore, the system won't boot.

[Arne_Saknussemm]

I would not run cache voltage that high...aim for 1.3v or less for 24/7 OC

Cache is fine lower than core....only performance increase is really to be seen in these specialist benchmarks...no point running that sort of voltage for cache...drop it to 40 42 and see what voltage auto sets...and then see if you can reduce voltage

Auto on my board goes too high even at lower cache multipliers....I have never dared to see what it would set for 44 for example....I can run 44 cache at 1.18v

cache is just for a bit of fun OCing...this is 1.33v I wouldn`t run that 24/7 either....no need

[Alexauwa]

Arne Saknussemm wrote:
I would not run cache voltage that high...aim for 1.3v or less for 24/7 OC

Cache is fine lower than core....only performance increase is really to be seen in these specialist benchmarks...no point running that sort of voltage for cache...drop it to 40 42 and see what voltage auto sets...and then see if you can reduce voltage

Auto on my board goes too high even at lower cache multipliers....I have never dared to see what it would set for 44 for example....I can run 44 cache at 1.18v

cache is just for a bit of fun OCing...this is 1.33v I wouldn`t run that 24/7 either....no need

I just posted a similar question to help increase the cache ratio. What tool do you use to read out your different voltages?

[Arne_Saknussemm]

I look in the BIOS....I do all my OCing in the BIOS

🙂