CPUz bad for benchmarking?? (cache and branch predicition)

[EarthDog]

From a Tom's Hardware article..... I found this to be an interesting read.

It's a really short read, but:

The cache is a small amount of memory integrated into processors to lower the time spent communicating with RAM, which is much slower. The CPU-Z benchmark is less than 32KB large, which fits into the L1 (first level) cache of even old CPUs. While technically very efficient, it also makes for a benchmark that can't stress a CPU's cache, so CPUs with better cache don't score any better.



Branch prediction is the process of a chip attempting to guess upcoming tasks. Correct predictions mean faster execution, while wrong predictions lose time. In CPU-Z, Chips and Cheese found that even the infamous FX-8150 Bulldozer CPU had a branch prediction success rate of 95%. That's pretty generous for a CPU that received universally bad reviews when it launched in 2011.

CPU-Z Isn't Good For Benchmarking CPUs According To New Study

It's no Cinebench 2024.

www.tomshardware.com

 

[freeagent]

CPU-Z sucks as a benchmark!

There, I said it

Now quit running it lol..

 

[EarthDog]

I honestly never thought it was good (for no real reason, lol). That said, I never looked at a results table to see if things were wonky in the first place. I suppose it really depends on how cache heavy the application is as to how much it would matter in skewing the results.

 

[Woomack]

Yes.

 

[BugFreak]

I never used it for benchmarking and honestly didn't even know it had the ability. I guess I'll continue not doing what its terrible at.

 

[mackerel]

The only use I found for that benchmark tab in CPU-Z is to run a quick AVX workload if I want to warm the CPU up for any reason.

 

[freeagent]

The only use I found for that benchmark tab in CPU-Z is to run a quick AVX workload if I want to warm the CPU up for any reason.

Linp.. nvm

 

[mackerel]

Linp.. nvm

I pretty much 100% install CPU-Z on every system I have, so it is always there. Linpack suffers from that there isn't a single great reference implementation, and the ones you can find out there usually are pretty ancient and don't support past AVX2. Prime95 would be my go to for AVX-512 support also, but I don't always have it, and it is a bit more fiddly if you want to turn it on and off easily.