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AMD Ryzen 7 7840U Performance Benchmarks on Linux

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Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#81

Post by shmerl »

lhl wrote: post #16

For those interested in seeing more about how these new 7040 APUs (Zen4 + RDNA3 "Phoenix") perform, Notebookcheck just reviewed a 7840HS (65W max TDP I believe) minipc: https://www.notebookcheck.net/AMD-Ryzen-7-7840HS-performance... Although not Linux specific, the nice thing about Notebookcheck is they have a nice database of other CPUs/devices that you can easily compare against. ServeTheHome has been reviewing a l…

Do you have experience with Beelink mini PCs? Reviews about their company are kind of mixed, some are pretty bad saying they have almost no support.

Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#82

Post by AnthonyMouse »

adrian_b wrote: post #17
ChuckNorris89 wrote: post #5

For those unaware, this isn't AMDs top of the line laptop chip, but the top of the line ultra low power laptop chip. It's meant for ~15W thin and light devices, not thick gaming laptops, AMD has 35W parts for those.

The top models of AMD Phoenix, i.e. of the laptop CPUs which are intended to be used with their integrated GPU, not with an external discrete GPU, are Ryzen 9 7940HS and Ryzen 7 7840HS. Many benchmarks for these 2 models can be seen at: https://www.servethehome.com/minisforum-um790-pro-review-big... TLDR: Both Ryzen 9 7940HS and Ryzen 7 7840HS laptop CPUs (which are slower than the Ryzen HX laptop CPUs) are faster th…

To be fair, comparing mobile CPUs to desktop CPUs on power consumption is basically meaningless, because desktop CPUs will double the power consumption to get a few extra percent on performance, performance per watt be damned.

And it's comparing against the previous generation 12900 instead of the current generation 13900.

And the extra threads on the 12900 are the E-cores, which aren't that fast.

Basically the result is that current gen AMD mobile CPUs are faster than last gen Intel desktop CPUs. Which is true, and not unimpressive, but far less informative than a comparison of like with like would have been.

Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#83

Post by jauntywundrkind »

brucethemoose2 wrote: post #56
lhl wrote: post #16

For those interested in seeing more about how these new 7040 APUs (Zen4 + RDNA3 "Phoenix") perform, Notebookcheck just reviewed a 7840HS (65W max TDP I believe) minipc: https://www.notebookcheck.net/AMD-Ryzen-7-7840HS-performance... Although not Linux specific, the nice thing about Notebookcheck is they have a nice database of other CPUs/devices that you can easily compare against. ServeTheHome has been reviewing a l…

Notebookcheck is a saint. I have never seen such thorough, technical reviews of laptops anywhere else, much less so many of them. I really hope they stay alive in this video review age.

Their tech product news feed is also unparalleled. Definitely not for a lot of people, but for those who do want to see what's coming out for monitors, phones, tablets, laptops, et cetera, https://www.notebookcheck.net/News.152.0.html is seemingly the definitive place to be.

Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#84

Post by ysleepy »

Luker88 wrote: post #41
shmerl wrote: post #8

So when are Lenovo Thinkpads with such chips coming out?

I have a Thinkpad p16s (amd 6850U), and while it's overall a good laptop, I would not recommend thinkpad again. Aside from a hardware defect at the beginning (cpu cooler not correctly installed), they disabled S3 sleep in BIOS after an update and sleep is sill broken. Unless I boot with `processor.max_cstate=1` the graphics lock up ~once a day (even if you keep it idle and on AC), and resume is more miss than hit. It…

I have the P14s with 5850U and the S3 sleep is available when setting the sleep mode to "Linux" in the BIOS, maybe they removed that in newer models though.

Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#85

Post by fbdab103 »

hospitalJail wrote: post #77
fbdab103 wrote: post #74

Earlier quoted context omitted.

Yet many people are happy with the Steam Deck which has a roughly equivalent GPU[0] >The Steam Deck GPU is based on hardware that is difficult to compare to typical PC video cards. However, the GPU’s maximum throughput of around 1.6 teraflops makes it loosely equivalent in power to an Nvidia GTX 1050 or GTX 950. [0] https://www.gamerevolution.com/guides/687871-steam-deck-gpu-...

I don't think console gamers are a great way to determine demand of computing platforms. Look at the Switch.

You mean the platform that sold 120MM+ units?

No True Scotsman aside, people can game how they choose. The bottom line is that many people are running new, AAA games on this tier of GPU. Is it the best possible fidelity? No, but presumably it is enough for them to derive some enjoyment.

Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#86

Post by Tostino »

hospitalJail wrote: post #77
fbdab103 wrote: post #74

Earlier quoted context omitted.

Yet many people are happy with the Steam Deck which has a roughly equivalent GPU[0] >The Steam Deck GPU is based on hardware that is difficult to compare to typical PC video cards. However, the GPU’s maximum throughput of around 1.6 teraflops makes it loosely equivalent in power to an Nvidia GTX 1050 or GTX 950. [0] https://www.gamerevolution.com/guides/687871-steam-deck-gpu-...

I don't think console gamers are a great way to determine demand of computing platforms. Look at the Switch.

Steamdeck is running PC games though...

Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#87

Post by beebeepka »

curiousWaste wrote: post #68
beebeepka wrote: post #63

Earlier quoted context omitted.

It's going to be night and day for sure. Your CPU wasn't great when it launched. I have several Ryzen laptops, including a 6800H. The thing is as fast as the latest and greatest from Apple, although with a bit worse battery life. I get about 12 hours in Linux with Gnome. Very quiet. The fan turns on only during gaming, or prolonged compiling. The mobile Ryzen 7000 line is a bit messy, though. If you want the Zen 4 st…

Thanks, might upgrade to lenovo yoga slim 7 when it comes available. It has 7840u and oled screen. I was just looking oled laptop screens on electronic store today. It looked great even text which some say looks poor on oled.

Just in case you are going to be running Linux - make sure the WiFi drivers have been mainlined.

It can be a problem with newer models. Make sure you run the 6.2 kernel or newer. Second best option would be to build the drivers yourself, assuming they are available in the first place

Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#88

Post by lhl »

up6w6 wrote: post #75
lhl wrote: post #16

For those interested in seeing more about how these new 7040 APUs (Zen4 + RDNA3 "Phoenix") perform, Notebookcheck just reviewed a 7840HS (65W max TDP I believe) minipc: https://www.notebookcheck.net/AMD-Ryzen-7-7840HS-performance... Although not Linux specific, the nice thing about Notebookcheck is they have a nice database of other CPUs/devices that you can easily compare against. ServeTheHome has been reviewing a l…

> usually can have their TDP modified in BIOS, via Ryzen Master, or third party tools like RyzenAdj (Phoenix support: https://github.com/FlyGoat/RyzenAdj/pull/256 ) to perform pretty closely. I didn't know about that. Do you have citations or benchmarks?

A few years ago I did a bunch of poking w/ a 4800H, you can see the actual mechanics of using RyzenAdj. There are also Geekbench 5 benchmarks linked from the doc at different power limits which you can compare to 4800U devices on Geekbench's site: https://github.com/lhl/linuxlaptops/wiki/2020-MECHREVO-Code-...

Note, each laptop manufacturer may choose their different power limits (and like Intel, AMD's curves are largely driven by temperature, so dependent on cooling solution and other settings).

This is a good summary of some of how Ryzen Mobile's power limiting works (actually, read that whole wiki if you're interested in the topic): https://github.com/FlyGoat/RyzenAdj/wiki/Renoir-Tuning-Guide

I'd also look up "AMD PMF" (their equivalent of DPTF) which only recently made it's way to the Linux kernel (but of course, that will include loads of details anyone can look through): https://www.phoronix.com/news/AMD-PMF-CnQF-Linux-6.1

Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#89

Post by lhl »

shmerl wrote: post #81
lhl wrote: post #16

For those interested in seeing more about how these new 7040 APUs (Zen4 + RDNA3 "Phoenix") perform, Notebookcheck just reviewed a 7840HS (65W max TDP I believe) minipc: https://www.notebookcheck.net/AMD-Ryzen-7-7840HS-performance... Although not Linux specific, the nice thing about Notebookcheck is they have a nice database of other CPUs/devices that you can easily compare against. ServeTheHome has been reviewing a l…

Do you have experience with Beelink mini PCs? Reviews about their company are kind of mixed, some are pretty bad saying they have almost no support.

Most of these MiniPC companies like Beelink, Minisforum, Morefine, etc are small Shenzen-based operations so personally I wouldn't expect much in terms of support (whether it's BIOS updates or warranty). If you're going to get one, I'd recommend ordering from Amazon or somewhere local you can easily return it if it's DOA, or going for a more established brand w/ a local distributor/support (Asus, Gigabyte, HP, Lenovo all ship AMD minipc models).

Re: AMD Ryzen 7 7840U Performance Benchmarks on Linux

#90

Post by esperent »

Tade0 wrote: post #69
esperent wrote: post #64

Earlier quoted context omitted.

I also live in Asia (Vietnam) and my previous two laptops have had Intel chips (current: MSI GE66 i7+3070, previously an old Clevo with a 970m). I've never had noticeable thermal throttling even when running in very hot summers in rooms with barely functioning AC (which is basically every room here). My northern European body struggles - a lot - but I haven't seen my laptops being much bothered. I do a lot of intense…

Are your tasks CPU-intensive though? My laptop idles at less than 20°C above ambient, so usually in the high 40s, but the fans already speed up when it reaches 60°C - at 37°C I have just a few degrees of wiggle room until inevitably it starts cooling more aggressively.

Yes, I used to do a lot of rendering on the CPU. Fortunately GPU rendering is better now.
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