Am Sun, Mar 26, 2023 at 07:18:09PM -0500 schrieb Dale: > I used to use the bogomips number as a rough guide. Thing is, the new > CPU has a lower bogomips number than my current CPU does. That doesn't > seem right.
Bogomips seems to be veeeery simple, because it takes the current frequency into account. So the number will be low when your PC idles and very high when you compile something. The “bogo” stands for bogus for a reason. From Wikipedia [https://en.wikipedia.org/wiki/BogoMips]: “It is not usable for performance comparisons among different CPUs.” > So, I guess that number no longer means much. So, I went > digging on the site you linked to. I found this but not sure what to > make of it. > https://openbenchmarking.org/vs/Processor/AMD+Ryzen+9+5900X+12-Core,AMD+FX-8350+Eight-Core > > Some tests, my CPU is faster. Most, the new one is faster. Your CPU is not faster at any of them. Look at the label at the top of each graph; for some tests, lower is better (as in “time taken for a task”). For instance, the GnuPG test for encrypting a 2 GB file takes 11.6 seconds on the Ryzen, and 19.4 on your CPU. The test is single-threaded, so for this kind of task, you can expect around a ⅔ increase in performance per core (or rather, thread). OTOH, the m-queens 1.2 test is multi-threaded and you get 39 s vs 238 s, meaning over 5 times more performance. Probably at lower electricity draw. > I'm trying to figure if I'd be better in the > long run to buy that expensive CPU or pick one of the cheaper ones you > mentioned. I started off with a 4 core on current rig and went to 8 > core and slightly higher frequency. Money wise it was pretty painless. > I could do that again with new rig. Of course, only you can answer that in the end. Write down what you need and what you care about. Weigh those factors. Then decide. Raw CPU power, electricity bill, heat budget (cooling, noise, dust), the “new and shiny” factor (like DDR5), and price. As I mentioned earlier, the 7xxx-X series are hotheads. But when run with a lower power budget, they are very efficient (which is basically what the non-X do). Compiles will speed up no matter what CPU you choose. But where else do you need compute power? Video transcodes can be done in the background, and there is also a limit to what parallelisation can achieve. Encryption is also a non-issue for you. Even my 10 year old i3 in the NAS can encrypt over 1 GB per second, IIRC. -- Grüße | Greetings | Qapla’ Please do not share anything from, with or about me on any social network. Dying is the most common cause of death.
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