z510 i7 only having backlit KBD. i5 version dont.
HP Envy 15-j110tx also promising. Any idea? Seems overpriced but i am ready to pay more bucks for HP. It has 8GB and M processor with 740 Nvidia. Awesome sleek & tiny look.
Same CPU -i5-4200M and GPU-2GB GT740M Nvidia graphic in HP. I checked.HP brand value and premium look impressed a lot.
But M processor draws more power leads into big fan & more batter backup than U processor. See some notes below. Well, again confused bet M & U?!!U processors have half the performance of M processors.
3rd gen M processor>>>4th gen U processor.
3rd gen M/U processor is 10% weaker than 4th gen M/U processor respectively.
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Don't even consider 3rd gen U processors. They were trash.
But M processor draws more power leads into big fan & more batter backup than U processor. See some notes below. Well, again confused bet M & U?!!
P1010501A lot of people have been asking the very sensible question – Why Ultrabook when you can get a 1.5KG notebook that delivers the same battery life and runs at a higher clock rate?
Update: A follow-up test, focussing on CPU power only, has now been published.
In nearly all comparison cases, the ‘lower clocked’ Ultrabook is based on an Ultra Low Voltage (ULV) 1.3-1.8Ghz Core i3, i5 or i7 CPU and is being compared to a laptop running a standard mobile equivalent of 2.2-2.5Ghz. With Intel Turbo Boost some of the clock rates can go higher but it’s not important for the comparison.
What’s the difference?
The simple answer is that the laptops using the Mobile CPU are less efficient and takes more energy to get the same thing done as on an Ultrabook. Lower efficiency means higher temperatures, shorter battery life and as a result, the need for a bigger battery pack and a bigger fan, which can get noisy.
In order to give you some real-world figures I went out and bought a Samsung NP350 with a 2.2Ghz Core i3 Mobile CPUfor about €430 (pre-tax.) The NP350 is a VERY interesting laptop for a number of reasons that I will go into in another article (I’ve chosen the the NP350 to be my companion at CES this year) but to summarise, we’re looking at a Core i3 CPU that runs from 800Mhz – 2200Mhz (SpeedStep. No Turbo Boost,) 4GB RAM, a 600GB hard disk drive, 12.5” screen at 1366×768 and a weight of 1.4KG. In terms of specs and performance it matches theAcer Aspire S3 very closely indeed, for nearly half the price.
In fact, if you’re looking at the Acer Aspire S3, do take a close look at the NP350. It’s NOT as efficient but because it uses lighter plastics and doesn’t focus on an ultra-thin style, Samsung have managed to put a 47Wh battery inside a 1.4KG device. That’s 27% bigger than the battery on the Acer Aspire S3. Does this mean the NP350 matches Ultrabooks in every aspect? Almost.
The NP350 swaps style for battery size but there’s an important caveat; the NP350 may have shorter battery life in some scenarios because the ‘mobile’ CPU can drain battery at a shockingly high rate when under load. In extreme cases, 40% more than the Acer Aspire S3. In average use cases, it may not be such an issue but let’s take a look to see how the Samsung NP350 with the Core i3 Mobile CPU (Core i3 2330M 800-2200Mhz) compares to the Acer Aspire S3 with the Core i5 Ultra-Low Voltage (Core i5 2467M 800-2300Mhz)