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Haswell Iris review

d_brennen said:
Using the iGPU to encode vs the CPU cores?
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That's what I thought, but then saying it's using more power than the i7 4770k is a bit sensationalist. It's using more power than the i7 4770k when both are using IGP.

CAT-THE-FIFTH said:
One with graphics card,one without.
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Then why the sensationalist "it's using more power than the 4770k?" It's only got igp figures, which makes sense it's using more power than the 4770K with IGP.
 
Martini1991 said:
That's what I thought, but then saying it's using more power than the i7 4770k is a bit sensationalist. It's using more power than the i7 4770k when using its IGP.
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It is using more power though. Its using more power at idle and more power at load.

Its a 55W TDP part and it is using more power than a 84W TDP rated part when not even using the IGP.
 
Martini1991 said:
There isn't a i7 4950 none IGP power usage there :confused:
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The i7 4950 is using the GT3e IGP. The Core i7 4770K has figures for BOTH IGP only with no graphics card and with an HD7950.

TR has always done two seperate power measurements for an CPU with an IGP in it.

Those IGP figures for the Core i7 4770K,are with the GT2 IGP with no discrete card in the system. The other figures are with an HD7950 in the system.

Those X264 figures are using a CPU only encoder with no GPU help.

The addition of the GT3e has bumped up static power consumption of the entire chip.

power-idle_zps7b02fc67.png


power-peak_zpsecacad7c.png


power-total-energy_zps0a51d1ad.png


power-task-energy_zpsfb677a54.png
 
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Are you sure they're not using IGP encoding? I saw Handbrake update with OpenCL support the other day.
It's the only way to explain the power draw. Otherwise it makes no sense whatsoever.

Which is where our confusion was coming in, as it's only logical the GT3 would draw more power than GT3.

CAT-THE-FIFTH said:
The truth is the part is using your part and you are misrepresenting for some reason.
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Also, what the hell is this meant to mean :p? It's no known dialect lol.
 
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Martini1991 said:
Are you sure they're not using IGP encoding? I saw Handbrake update with OpenCL support the other day.
It's the only way to explain the power draw. Otherwise it makes no sense whatsoever.

Which is where our confusion was coming in, as it's only logical the GT3 would draw more power than GT3.
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If you look at the Turbo specs,for the Core i7 4950HQ it Turbos to around 3.4GHZ when all cores are enabled,which is not massively behind the Core i7 4770K with its 4 core Turbo.

The issue is the TDP though. The desktop part is rated at 84W TDP and the other part is 55W to 69W. So either the desktop part is overrated or the laptop is underrated.

The Intel test system used is meant to exactly replicate a laptop according to TR. It even uses SO-DIMMs,a three phase VRM and even the PSU is made to simulate a battery.

The TR socket 1150 system is using a high end board,with multiple phases(less efficient),full DIMMs and a PSU way out of its efficiency range at low IGP only loads.

It looks more like the GT3e is adding a lot of static power consumption to chip.

The problem,is though it could mean a discrete GPU and one of the lower TDP Intel mobile chips might end up giving better gaming performance,similar power consumption, and costing less, the disadvantage possibly being pure CPU performance,and a more complex motherboard.

It might be why Nvidia was boasting:

http://www.fudzilla.com/home/item/31551-nvidia-mobile-boss-talks-haswell

However,I think once the laptops with the Core i7 4950HQ are released we might get a better comparison,and see if the power consumption has been worked out or not.
 
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Don't you mean the desktop part is over rated and the Laptop is under rated?
Intels TDP ratings confuse me anyway, just look at 3770K to 4770K.
 
Martini1991 said:
Don't you mean the desktop part is over rated and the Laptop is under rated?
Intels TDP ratings confuse me anyway, just look at 3770K to 4770K.
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Oops! Yep,corrected now.

Edit!!

Having said,I do think the L4 cache might be what is also not helping here on top of it.

It does make me think if AMD can afford to implement something similar,considering their CPU sections don't really help their IGPs out either,due to power consumption,and it would not help in this regard either.
 
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Overall that CPU looks really good, definitely something I'd want in a laptop, dat battery life.
But that's quite a heavily cut down GT3, but fits in the same TDP as my i3 does, which runs a crippled HD4000.
 
Martini1991 said:
Overall that CPU looks really good, definitely something I'd want in a laptop, dat battery life.
But that's quite a heavily cut down GT3, but fits in the same TDP as my i3 does, which runs a crippled HD4000.
Click to expand...

The comparison is to a ULV HD4000.

Also,the GT3 without L4 cache is only found in Ultrabooks it seems.

Edit!!

Here are more details of the Acer laptop with the HD4400:

http://reviews.cnet.com/8301-3121_7...8-inch-iconia-w3-tablet-and-new-z3-v7-and-v3/

It uses a Core i5 4500U:

http://ark.intel.com/products/75460/Intel-Core-i7-4500U-Processor-4M-Cache-up-to-3_00-GHz

It is a 15W TDP CPU too.
 
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I really like the MacBook air this time around, hoping some windows ultrabooks can compete
people want their laptops to last as long as tablets, especially when they cost twice as much so I really don't think intel went far wrong

...atleast on their mobile parts :p
 
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