Decrease in CPU performance - Meltdown/Spectre BIOS Update

[linusminecraftips]

I noticed a 0.005%-0.85% consistent drop in CPU performance after updating my motherboard's Bios to a revision that was supposed to mediate the metldown and spectre flaws. Is this normal? 

 

CPU: i7 6700

GPU: GTX 1060

SSD: Ultra II 960GB 

(All drivers and updates are to the most current version.) 

 

[Od1sseas]

Yes it's normal

[LienusLateTips]

yes it is

[Pixel5]

yes this is expected because they had to disable/change a technology that made the CPU faster but was also the reason for the security issue.

[Spotty]

30 minutes ago, linusminecraftips said:

I noticed a 0.005%

I bet you're the sort of person who notices if a single M&M is missing from your candy jar.

[WereCat]

How do you notice a 0,005%-0,85% difference in a CPU performance? Its even less than the range of error you get on most extensive tests...

[PianoPlayer88Key]

6 hours ago, WereCat said:

How do you notice a 0,005%-0,85% difference in a CPU performance? Its even less than the range of error you get on most extensive tests...

*Runs 3DMark Ice Storm, observes a 121,250 physics score and 707,500 graphics score.

*Applies Meltdown/Spectre patches.

*Re-runs Ice Storm, noting physics score of 121,249 and graphics score of 707,502.

 

"AAAAAUUGHH! OMG HEEELLP!! My CPU's performance just tanked below the sewers after I patched Meltdown and Spectre! ?"

[AngryBeaver]

Ill try to explain why real briefly.

 

So basically the vulnerability they are passing was one that handled predictions. It would predict what the machine was going to do next... and since they got really good at predicting these things over time it led to some decent performance gains. Now with specter/meltdown that prediction is what makes the system vulnerable... so by disabling it you are no longer getting that nice little prediction boost.

[linusminecraftips]

9 hours ago, PianoPlayer88Key said:

*Runs 3DMark Ice Storm, observes a 121,250 physics score and 707,500 graphics score.

*Applies Meltdown/Spectre patches.

*Re-runs Ice Storm, noting physics score of 121,249 and graphics score of 707,502.

 

"AAAAAUUGHH! OMG HEEELLP!! My CPU's performance just tanked below the sewers after I patched Meltdown and Spectre! ?"

Isn't Ice Storm a GPU benchmark? 

[PianoPlayer88Key]

23 minutes ago, linusminecraftips said:

Isn't Ice Storm a GPU benchmark? 

Yes, but it has a CPU part of it.

[Coaxialgamer]

It's normal to see a performance drop . However , given the numbers you are stating , i'd just chalk it up to margin of error . <1% is not a large enough delta to definitely prove anything