Question Desktop vs mobile CPU

WelshBloke

Lifer
Jan 12, 2005
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Hi, is there a quick and dirty place for seeing the relative performance between desktop and mobile processors?
I tried the Anandtech Bench thing but CPU naming schemes seem a bit chaotic when trying to compare mobile vs desktop.

Basically I want to see if its worth building a new desktop or just getting a nice laptop and using a docking station with an eGPU.
 

Tech Junky

Platinum Member
Jan 27, 2022
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There's hundred plus skus for CPUs you need to be s bit more specific.

Intel/AMD
K or non K
iGPU - Intel / dGPU - AMD
RTX / XT / Arc

Best bang for the buck though is a barebones setup where you add your own stuff to the laptop.


I picked up one with a 12700h/3060 and added ram/drives to it for much less than the typical laptop you buy off the shelf and it arrived within the same week of ordering it.
 

Roland00Address

Platinum Member
Dec 17, 2008
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Notebook Check is good for it gives things like Cinebench and so on. Somewhere between 3 to 30 benchmarks per laptop cpu.

Likewise the same with Geekbench 5 (but not 4), and CPU Benchmark dot net

Remember if a result is 20% or less a difference, it is the Placebo / Nocebeo effect inside your mind.
  • This is a brain network tied to affect (think affection and 1/4th of empathy, since we use 4 attention networks in combination to generate empathy),
  • but also pleasure, and pain and the main point is that it is tied to attentional switching. It is a wacky brain network where when you are primed and putting attentional salience on a thing it makes something affectively feel more important than normal generating the placebo / nocebeo effect with pain, pleasure, and attentional switching. The small becomes big in other words for things are primed to notice. But when the network is not primed only large changes trigger this attentional switching and feeling the affective sensation.
  • Likewise this same network is tied to multiple attentions and distracting oneself. Like you need to get a needle shot well looking at ceiling tiles and counting them can lower the salience of you in your back in your brain knows a needle is coming.
  • Likewise this same network is tied to multiple attentions and distracting oneself. Like you need to get a needle shot well looking at ceiling tiles and counting them can lower the salience of you in your back in your brain knows a needle is coming.
So back to my point if it’s less than 20% it is you convincing your own brain something is super-important when it is not really super-important.
 

Markfw

CPU Moderator, VC&G Moderator, Elite Member
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May 16, 2002
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Well thats the bit I was trying to decide on!

Basically how do the top end mobile CPUs stand up to desktop systems?
Equivalent to the previous gen?
You need to still be more specific. For example, a laptop CPU doing something that one thread is all it requires for a short time may be very similar to an desktop part. But you put 32 cores load on both, and the laptop will fail horribly.

Edit: By fail, I mean it will be a LOT slower. Desktops can dissipate a lot more heat and a lot quicker than laptops. Desktops can also run their cores faster, unless its like one core.
 
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WelshBloke

Lifer
Jan 12, 2005
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Notebook Check is good for it gives things like Cinebench and so on. Somewhere between 3 to 30 benchmarks per laptop cpu.
Its a bit of a pain to dig through CPU lists to find out what are equivalent CPU models across two manufacturers and desktop/mobile lines.
Basically I'm trying to be lazy and getting someone else to do the heavy lifting and link a website with a nice list with desktop and mobile CPUs in order of performance! :)
 

Tech Junky

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Prev generation isn't something to consider. Now, ADL vs RPL is just more of a price difference as RPL is more of a refresh similar to what Intel did with 10th/11th gen CPUs.

Comparing 12700 Desktop / Laptop is apples to apples. Same would apply to 13700 though you can't get a laptop RPL until next year probably late spring.


Where the bigger difference comes into play is the GPU

a 3060 will vary significantly between laptop / desktop when it comes to the RAM on the GPU..

 

WelshBloke

Lifer
Jan 12, 2005
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You need to still be more specific. For example, a laptop CPU doing something that one thread is all it requires for a short time may be very similar to an desktop part. But you put 32 cores load on both, and the laptop will fail horribly.
Fair point. Assume its an equal core count on both. 8c16t?
 

Tech Junky

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https://cpu.userbenchmark.com/Compare/Intel-Core-i7-12700K-vs-Intel-Core-i7-13700K/4119vs4137 -- ~10% boost with RPL you pay a premium because it's newer but doesn't offer a good ratio for performance vs cost increase

There are some niche things you get with a Z790 chipset that you won't with most Z690 board options though.

Then there's the pairing of the system with DDR5 vs DDR4 if you want to pay the premium for DDR5 for small boost in performance that's a choice as well.
 

Tech Junky

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no contest, if the load is 100% on those then (Intel or AMD) will be a lot slower on laptop vs desktop.
Not really. The CPU performs about the same between both if you properly cool it on both systems. The difference comes with the GPU though due to restricted space / cooling in a laotop.
 

WelshBloke

Lifer
Jan 12, 2005
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Not really. The CPU performs about the same between both if you properly cool it on both systems. The difference comes with the GPU though due to restricted space / cooling in a laotop.
Yeah. I was considering using an eGPU when docked.
So big monitor, proper keyboard and mouse, hefty GPU when docked. Thin, portable and decent battery life when in 'portable' mode.
 

Tech Junky

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Yeah. I was considering using an eGPU when docked.
So big monitor, proper keyboard and mouse, hefty GPU when docked. Thin, portable and decent battery life when in 'portable' mode.
eGPU isn't necessary but would keep costs down on the laptop or could be used on both types of systems interchangeably.

I can squeeze a few hours out of mine using a power bank to supplement the battery for extended use. The laptop isn't efficient for gaming on battery though. For run of the mill stuff though it hits about 60W of power needs and with the power bank I can typically get ~3 hours of use.

I supplement power on the move with a tiering of power from the car CLA >> PB >> Laptop to keep things topped off. I run it off the PB using a USBC trigger cord that gets a max of 100W which isn't enough to do anything that triggers the 3060 to be engaged as the power requirements hit 180W at that point and just cause USB charging to flap and not keep the battery topped off.
 

Markfw

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Not really. The CPU performs about the same between both if you properly cool it on both systems. The difference comes with the GPU though due to restricted space / cooling in a laotop.
It is impossible to cool a 8 core laptop@ the same frequency as an 8 core desktop, even with a low to mid grade cooler. Let say both @4 ghz and 100% load (16 threads). No laptop I know could do that.
 

Markfw

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I keep things simple and just use GB5.

Example:

Desktop 12700K: https://browser.geekbench.com/processors/intel-core-i7-12700k

Mobile 12800HX: https://www.notebookcheck.net/i7-12800HX-vs-R9-5980HS-vs-i5-12600HX_14405_13107_14411.247596.0.html

View attachment 72291

i7-12800HX is bit slow in ST but almost matches 12700K in MT.

AMD's top mobile monster is quite behind Intel's offering: https://browser.geekbench.com/v5/cpu/19065613
Try using the 6000 series for AMD and raptor lake for Intel.
 

Tech Junky

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It is impossible to cool a 8 core laptop@ the same frequency as an 8 core desktop, even with a low to mid grade cooler. Let say both @4 ghz and 100% load (16 threads). No laptop I know could do that.
I'm using a 12700K and 12700H and the both stay cool though the laptop does tend to be hotter because of the limited space.

There are tricks though that you can employ to keep the laptop cooler but, it's less mobile.


The most obvious option tough is to tinker with the voltage to drop the temps or finding a really good thermal solution between the BGA / plate.
 

Markfw

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I'm using a 12700K and 12700H and the both stay cool though the laptop does tend to be hotter because of the limited space.

There are tricks though that you can employ to keep the laptop cooler but, it's less mobile.


The most obvious option tough is to tinker with the voltage to drop the temps or finding a really good thermal solution between the BGA / plate.
Got benchmarks vs a 7700x desktop ?
 

Markfw

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No, do you?
First, he said 8 core 16t not 14c,20t. But here is what I found for the 12700H. I will edit when I find the corresponding 7700x.

"Looking at the benchmarks from ComputerBase, you can see that the Ryzen 9 6900HS (an 8-core CPU) manages to easily outperform the 14-core i7-12700H when the TDP of both the chips is set to 45W. In Cinebench R20, the former scores 4,873 points, beating the latter by roughly 100 points. In CB R23, the Alder Lake part fares a bit better but still fails to establish a meaningful lead. "

Here is the 7700x at 7701 vs the 4873 points of the fastest mentioned 8 core laptop


If you find something better fine, but I bet any 8 core (or even maybe 14) laptop can't touch a 7700x with both at stock settings.
 
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igor_kavinski

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Try using the 6000 series for AMD and raptor lake for Intel.
That would be unfair to the AMD 6000 series coz RPL ST score exceeds 2100.

I do admit that AMD 6000 with LPDDR5-6400 would slow down the foreground task much less compared to Intel when some heavy background task like video encoding is running. For true multitasking, AMD still rules. Too bad AMD laptops with 32GB LPDDR5 cost upwards of $2000. Wish Acer would create a DTR laptop with 5800X3D/USB4 and price it at $1500. I would so buy that!
 

Markfw

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That would be unfair to the AMD 6000 series coz RPL ST score exceeds 2100.

I do admit that AMD 6000 with LPDDR5-6400 would slow down the foreground task much less compared to Intel when some heavy background task like video encoding is running. For true multitasking, AMD still rules. Too bad AMD laptops with 32GB LPDDR5 cost upwards of $2000. Wish Acer would create a DTR laptop with 5800X3D/USB4 and price it at $1500. I would so buy that!
Trying to keep with his request (8c/16t, laptop to desktop) I am pretty sure the 7700x will destroy any 8c laptop at MT tasks.
 

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