A Core i7 laptop at 47K, so why desktops are costlier?

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BhargavJ

In the zone
These two laptops have an i7 processor, and yet they are priced below 70k:

47K:
Asus K55VM-SX086D Laptop (3rd Gen Ci7/ 8GB/ 1TB/ DOS/ 2GB Graph) - Asus: Flipkart.com

64K:
Samsung NP550P5C-S05IN Laptop (3rd Gen Ci7/ 8GB/ 1TB/ Win8/ 2GB Graph) - Samsung: Flipkart.com

If we were to assemble an i7 desktop without a graphics card, it would still be very costly. So why are the laptops so cheap?
 
ico

ico

Super Moderator
Staff member
Manufacturing cost is same. Everything comes out of the same wafer. One huge waffer containing the same repeating die.

Then chips are binned, they become i5 desktop when Hyper Threading is disabled, i7 desktop if everything is fine, and if some i7 desktops are surprisingly running at good (low) power consumption at low frequencies, they become i7-QM laptop.

i3 desktop, i3 laptop, i5 laptop and i7 non-quad laptop also come out of the same waffer.
 
OP
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BhargavJ

In the zone
... I still don't understand. What is the meaning of stripped down version of the same hardware? Would it perform the same? If yes, then it would be better to have the laptop, with the advantage of mobility as well. Of course, you can't add components later, like an HDD or graphics card.
 
ico

ico

Super Moderator
Staff member
BhargavJ said:
... I still don't understand. What is the meaning of stripped down version of the same hardware? Would it perform the same? If yes, then it would be better to have the laptop, with the advantage of mobility as well. Of course, you can't add components later, like an HDD or graphics card.
Click to expand...
Clockspeed and thermal headroom.

My desktop i5 will still run circles around this. You can't use a laptop on full load for an extended period of time.
 
OP
B

BhargavJ

In the zone
Okay, so there will be a performance difference...

This guy is telling me about an i7 at 38K, and at the bottom he says prices include shipping and everything. Does PCPartPicker ship to India?

*www.tomshardware.com/answers/id-1847038/core-laptop-47k-desktops-costlier.html#11751034
 
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T

Techguy

In the zone
It may be a mobile i7, but in reality (assuming its a dual core), it will probably perform a bit faster than a desktop i3.

Yes, Intel bins all its chips.. so any good performing die.. which runs at lower voltages goes for mobile.. plus mobile chips are always more expensive.. And the mobile i7 may probably have a bigger L3 cache, but will run at lower clocks.. Also, mobile dies are much more expensive.. a mobile i5 dual core chip retails for around $300.. thats the price of a desktop i7.. but the mobile i3 will run at much lower voltages and consume much less power.. A mobile i5 consumes around 15-35W and runs at 0.6V .. but a desktop i3 consumes around 60W.. and runs at 0.9V

Naturally, if you get a good die, which will be needed for mobile, Intel sells it at a higher price.. so your typical mobile i7 ~ desktop i3.. only the i7 will be a bit faster
This creates an illusion that you are getting i7 class performance on a laptop .. the XM & QM editions.. the very high end i7's for mobile.. those are almost as good as desktop i5's and i7's.. only they use 45W.. desktop chips use 77W-95W.. so that is binning again.. plus in order to save power the mobile chip runs at lower clock speeds.. because of lower thermal headroom
 
CommanderShawnzer

CommanderShawnzer

Steam High Templar
Techguy said:
It may be a mobile i7, but in reality (assuming its a dual core), it will probably perform a bit faster than a desktop i3.

Yes, Intel bins all its chips.. so any good performing die.. which runs at lower voltages goes for mobile.. plus mobile chips are always more expensive.. And the mobile i7 may probably have a bigger L3 cache, but will run at lower clocks.. Also, mobile dies are much more expensive.. a mobile i5 dual core chip retails for around $300.. thats the price of a desktop i7.. but the mobile i3 will run at much lower voltages and consume much less power.. A mobile i5 consumes around 15-35W and runs at 0.6V .. but a desktop i3 consumes around 60W.. and runs at 0.9V

Naturally, if you get a good die, which will be needed for mobile, Intel sells it at a higher price.. so your typical mobile i7 ~ desktop i3.. only the i7 will be a bit faster
This creates an illusion that you are getting i7 class performance on a laptop .. the XM & QM editions.. the very high end i7's for mobile.. those are almost as good as desktop i5's and i7's.. only they use 45W.. desktop chips use 77W-95W.. so that is binning again.. plus in order to save power the mobile chip runs at lower clock speeds.. because of lower thermal headroom
Click to expand...
mobile i7's are quad-core afaik
 
Hrishi

Hrishi

******************
CommanderShawnzer said:
mobile i7's are quad-core afaik
Click to expand...

Not necessarily.There are Dual Core variants of the same. Although , the Core I5s are dual-core with HyperThreading acting as Quad-Core.

The best thing you can use to figure out what is better , whether a Dual-Core Desktop I3 or Quad-core Laptop I7 , use benchmarks and real-wrold applications processing time.
Compare the processing time taken for various applications on th'm.

Although , a Desktop Core i7 will dance circles around a Laptop's I7 because of higher clock rates and TDP.
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A Core i7 3610Qm should give performance similiar to i5-2500k , a bit on the upper side. And a bit performance lower than I7-2600.
 
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