Why doesn't Intel copy Nvidia and use desktop CPUs in laptops?

[spacetrucker]

The GTX 1080 desktop has 10% better performance than the laptop version. 

 

The i7 6700K has 30% better performance than the i7 6820HK according to userbenchmark

 

As far as I know the i7 6820HK is designed to consume less power and perform at lower temperatures so laptops can have slimmer chassis that use 200W or less AC adapters.

 

Both Pascal and Skylake are 16/14 nm, so why is a 1080 able to perform inside a slim chassis with minimal cooling at a 10% performance loss and a 6700K with a 30% loss? (assuming the i7 would be throttled to 30% loss if it were actually used inside the chassis)

[Energycore]

2 minutes ago, spacetrucker said:

according to userbenchmark

Userbenchmark is about the worst source for ballpark performance numbers

[Electronics Wizardy]

Its the same chip, just with lower power and a different package.

 

The lga package uses about 2x the space on the board as a pga or a bga package.

 

Also power. Most laptops are thin and don't like the heat and power

 

 

If you want a laptop with a desktop chip you can buy it.

[Castdeath97]

Some laptop makers actually do that:

 

[TheWildAussie]

im not a expert, but i guess its because CPUs have to do more than one thing, where GPUs only need to do one thing push frames to your monitor. 

[Qyoon]

Some laptops are using desktop CPU.

 

At least in France Materiel.net was selling some with custom chassis.

I5 4690K / i7 4790k and GTX980 ( not 980M)

 

Not that expensive btw.

 

edit : And they are still doing it.

http://www.materiel.net/ordinateur-portable/materiel-net-spartan-i5-1070-17-pouces-sans-os-138766.html

 

[Kobathor]

3 minutes ago, Energycore said:

Userbenchmark is about the worst source for ballpark performance numbers

every person and their dog on this site uses it as concrete performance numbers.. I don't though

[Bananasplit_00]

4 minutes ago, Energycore said:

Userbenchmark is about the worst source for ballpark performance numbers

i use it a bit, it gives a good view on whats better then other things but its not the place to get benchmark numbers or fps estimates

[JoaoPRSousa]

1. Heat output

2. Laptops run on batteries

3. Restricted cooling

[Pendragon]

20 minutes ago, spacetrucker said:

so why is a 1080 able to perform inside a slim chassis with minimal cooling

It can't. All those slim 1080s like the Aorus or Razer perform worse than a proper 1070 with a proper unlocked vbios on competing laptops. 

[Electronics Wizardy]

21 minutes ago, TheWildAussie said:

im not a expert, but i guess its because CPUs have to do more than one thing, where GPUs only need to do one thing push frames to your monitor. 

Same die, they do the same thing in desktops vs laptops.

[TheKDub]

28 minutes ago, spacetrucker said:

The GTX 1080 desktop has 10% better performance than the laptop version. 

 

The i7 6700K has 30% better performance than the i7 6820HK according to userbenchmark

 

As far as I know the i7 6820HK is designed to consume less power and perform at lower temperatures so laptops can have slimmer chassis that use 200W or less AC adapters.

 

Both Pascal and Skylake are 16/14 nm, so why is a 1080 able to perform inside a slim chassis with minimal cooling at a 10% performance loss and a 6700K with a 30% loss? (assuming the i7 would be throttled to 30% loss if it were actually used inside the chassis)

 

They have.

Not sure on all the exact laptops that have them, but I do know there are a handful out there.

 

Like this one: https://www.originpc.com/gaming/laptops/eon17-x/

It has up to a i7 6700K and a GTX 1080.

[Qyoon]

as i said , we have some in france too

http://www.materiel.net/ordinateur-portable/materiel-net-spartan-i5-1070-17-pouces-sans-os-138766.html

[Joshua Norris]

not sure if your in the UK but if you are lots of "boutique" builders do them, probably some do in the US too:    https://www.pcspecialist.co.uk/notebooks/octaneIII-15/  or this one that is faster than any laptop i have ever seen with sli 1080s and a desktop 6700k option with a further option for samsung 961 m.2 raid ssd's, a 4k panel, 2x 2.5 ssd's, when fully configured is around 6,500 pounds     https://www.pcspecialist.co.uk/notebooks/vortexVI-17/

[spacetrucker]

1 hour ago, Energycore said:

Userbenchmark is about the worst source for ballpark performance numbers

care to suggest any alternatives?

[Energycore]

Just now, spacetrucker said:

care to suggest any alternatives?

cinebench score is an alright ballpark number, PCMark from the same people who make 3DMark should also have reliable numbers on both CPUs.

[spacetrucker]

I am aware of eurocom, sager, offering clevo chassis with desktop cpu's however that does not really answer the question as to why mainstream gaming laptop cpu's take 30% performance loss compared to gpu's that take only 10% performance loss in laptops.

[TheWildAussie]

2 hours ago, Electronics Wizardy said:

Same die, they do the same thing in desktops vs laptops.

yeah, i was talking as in a performance because cpus need to do more it would be harder to put the same power as a desktop without attaching a turbine to it. sorry should of put more detail into what i was trying to say