[HN Gopher] Was Rocket Lake Power Efficient?
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Was Rocket Lake Power Efficient?
Author : rbanffy
Score : 36 points
Date : 2022-12-19 15:06 UTC (7 hours ago)
(HTM) web link (chipsandcheese.com)
(TXT) w3m dump (chipsandcheese.com)
| pcdoodle wrote:
| Intel solutions always seem to have better idle consumption.
| Maybe this has changed, I'm still playing with older equipment.
| KaiserPro wrote:
| From the stuff I have access too physically (xeons(well gold
| cpus) and thread rippers) the intel stuff is much cooler until
| you really rag it, where as the threadrippers are just plain
| warm.
|
| This isn't scientific, so I might be comparing big 64 thread
| monsters to smaller intel jobbies.
| jeffbee wrote:
| If anything Intel has become better with each newer generation.
| My 12700K idled at < 3W package power. My 13700K pulls even
| less. They have a lot of good stuff going on like not enabling
| the L3 cache if the CPU in only briefly awake, or dynamically
| resizing L3 if they can get away with it.
| thekombustor wrote:
| Fellow 12700k owner, I am very impressed with the idle power
| consumption. Mine reports idle at ~7W, which is pretty close
| to my laptop's R7 4750U.
|
| Came from an R5 2600, which I'm almost positive idled higher.
| While the full-core power consumption is quite excessive, I
| think Intel overall does a good job of efficiency under
| idle/light load.
| jeffbee wrote:
| If you object to the K-series CPU's ability to draw
| current, you have the option to use the linux tool
| `powercap-set` to limit it to 65W, 95W, or whatever
| arbitrary limit you think is best. Intel RAPL accepts its
| parameter down to the microwatt.
| selectodude wrote:
| My Zen3 still pulls >25W at idle which is an absolute
| embarrassment.
| duffyjp wrote:
| Is that a from-the-wall number or just the CPU?
| sgtnoodle wrote:
| My 5950x desktop pulls like 60W from the wall at idle in
| linux.
| GrayShade wrote:
| Damn. I'll have to test again, but mine idles around 120
| W IIRC.
| ridgered4 wrote:
| It doesn't help that the x570 chipset uses like twice the
| idle power of the x470 it replaced.
| mrguyorama wrote:
| I found that having steam open caused my ryzen 5 3600 to go
| from 3 watts idle to multiple tens of watts. Chromium under
| the hood is so stupid.
| eBombzor wrote:
| One major drawback of the chiplet arch.
| PaulHoule wrote:
| I feel like a bit of a dope, but I have to go look up these
| "Lake" chips from Intel by name whenever somebody writes about
| them.
|
| Often these are delayed so you've been hearing about "such-and-
| such Lake" for three years and by the time it arrives you are so
| sick of hearing it that it sounds like it is something old and
| obsolete.
|
| It looks like Rocket Lake is an advanced chip on the 14nm node
| which is not so bad as it sounds because the process of things
| getting better when you shrink has been derailed as of late.
| Before 2005 you had explosive progress in hardware because the
| clock speed and power consumption both go down. Until recently
| the cost per transistor went down, but now it is heading up which
| is one of the reasons why the 4090 is as crazy expensive as it
| is. I've seen 22nm parts still running strong after 10 years, I
| think 14nm parts will hold up, but it might be 7nm parts won't
| have that kind of lifespan.
| simpleintheory wrote:
| Off-topic, but why do we still use nm to refer to things? I
| assume everyone on here is already aware that it's purely a
| marketing term, but we still use it.
| gorgoiler wrote:
| I don't know if this will help you but it is at least a nice
| list in a plain text file -- _intel-family.h_ from the Linux
| source tree:
|
| https://github.com/torvalds/linux/blob/master/arch/x86/inclu...
| duffyjp wrote:
| I have an i7-2600 (32nm) still in service and it's shocking how
| well it keeps up with modern tasks. The cheapest current Ryzen
| you can buy would destroy it benchmarks but you'd never notice
| day-to-day.
| Rebelgecko wrote:
| I'm rocking an i5-4670k with a mild overclock, and I'm _just_
| getting to the point where it 's starting to bottleneck my
| framerate in games (the new MS Flight Sim was the straw that
| broke the camel's back)
| duffyjp wrote:
| It's probably a silly thing to do, but if you can pickup a
| 4770K or Xeon 1281v3 for the price of a pizza I bet you
| could get a a bit more life out of your machine. More cache
| and hyperthreading always helps.
|
| I had a 1271v3 in my son's PC until the motherboard died
| earlier this year and it was still quite beefy.
| buserror wrote:
| Same here, mine has been running overclocked to 5ghz for
| about 10 years (?) now and I refused to upgrade it by quite a
| few "lakes". Sure now it's getting pummeled by hugely
| multicores newer processors, but for a long time, it was top
| of the range.
| dehrmann wrote:
| The #1 reason to upgrade is Microsoft is demanding it for
| Windows 11. Otherwise, older CPUs with plenty of RAM and an
| SSD still do great for non-intense workloads.
| Mistletoe wrote:
| This is so incredibly lame of Windows. So much e-waste
| created so that secretaries can use excel and look at
| their Facebook on Windows 11.
| PaulHoule wrote:
| It's not an unreasonable decision for an OS vendor to
| occasionally say that a certain level of processor is
| necessary for future versions of the OS. Apple does it
| with MacOS. I have a 2013 Mac Mini that is going strong
| except that it doesn't run the latest version of MacOS.
| The only real problem I had with it is that Safari for a
| long time didn't support WebP on that version of MacOS
| which kept me using JPG images for a while.
|
| The trouble is that Intel's rollout of the future has
| been shambolic at best. Potentially revolutionary
| extensions such as TSX and SGX failed. It is still too
| early to require AVX-512 which could speed up and reduce
| power consumption of your web browser since many of
| Intel's "latest and greatest" client CPUs don't support
| it. (Don't buy the false claim that AVX-512 is a power
| pig: sure it will consume a lot of power running at full
| clock because it is doing a lot of work... AVX-512 helps
| "atom class" processors quite a bit because it avoids
| instruction decoding which Intel is bad at.)
|
| It's not clear that Microsoft's new line in the sand is
| going to buy them very much extra functionality for
| Windows.
| toast0 wrote:
| > The #1 reason to upgrade is Microsoft is demanding it
| for Windows 11.
|
| Isn't that also the #1 reason not to upgrade? In other
| words, is Windows 11 compelling yet? As of now, mostly I
| just hear complaints, and ocassionally tidbits about
| better scheduling for newer chips with multiple core
| types (which is compelling, but only if you upgraded)
| jerrygenser wrote:
| WSL 2 is significantly better on Windows 11 than Windows
| 10. If you do remote development on WSL, it's worth
| upgrading to Windows 11 purely for the ability to get the
| wsl2 improvements.
| frio wrote:
| Those have all (including WSLg) recently been completely
| backported to and made available on Windows 10
| (https://devblogs.microsoft.com/commandline/the-windows-
| subsy...).
| smolder wrote:
| No, Windows 11 is not compelling. MS is trying to be a
| worse apple, and doing a great job at it.
| Arrath wrote:
| Same here, I relatively recently* upgraded from my OC'd
| first gen i7, that thing was great for a very long time.
|
| *Good lord, has it been 3 years already?
| jerrygenser wrote:
| Interesting, because when I upgraded from a Ryzen 3000 series
| to a Ryzen 7000 series, I experienced significant speedups in
| various tasks: - Compiling code - Running multiple services
| in docker containers for local development that are a mix of
| cpu and io bound
|
| Whenever I use an older laptop I have that is on intel i7,
| 8th gen, these tasks are much much slower. I think it really
| depends on your workload.
| WaxProlix wrote:
| For sure. I moved from setup with an i7-6700k and a gtx
| 1070 to one with a 5900x and an rx 6900xt, and in games the
| upgrade wasn't really as strong as you might expect.
|
| Code compilation, hashing, rendering were all markedly
| faster though. That old PC became a perfectly serviceable
| hand me down after 5 years of service, and I hope to get
| another 5 out of this rig. Pretty cool that we're seeing
| longevity and some progress at the same time.
| duffyjp wrote:
| Oh, absolutely for what you describe newer chips are going
| to make a huge difference. The system I'm describing is
| used by my wife for Steam games, remote desktop, media
| consumption etc.
|
| My work laptop is an M1 Max and personal laptop an ancient
| i5 Macbook. I had it upstairs recently and thought I'd do a
| little coding but gave up after a single `brew install
| whatever` was still going after 20 minutes and I lost my
| motivation...
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