Dell XPS 15z: Sincerely Flattering
by Jarred Walton on September 2, 2011 1:30 AM ESTDell XPS 15z Battery Life: Up to 7.5 Hours
It’s interesting to look at battery life for what should otherwise be similar laptops, as the results aren’t always what you’d expect. Consider NVIDIA’s Optimus Technology, which allows the discrete GPU to complete shut off when it’s not in use. Given that the dGPU isn’t using any power in such laptops, in theory we should see consistent relative battery life across all Sandy Bridge (or Second-Generation Core i-series if you prefer the official name) laptops—with dual-core offerings doing somewhat better than quad-core laptops. A look at the results in Mobile Bench however proves that this doesn’t always happen.
ASUS’ K53E uses an i5-2520M and manages 6.43 min/Wh in the Internet test, but the Toshiba M645 only gets 5.23 min/Wh. On the quad-core side of things, the initial Sandy Bridge test laptop got 5.86 min/Wh—a mark yet to be equaled by any shipping SNB quad-core laptops! Alienware’s M14x gets 5.02 min/Wh in the same test while the Dell XPS 15 L502x only scores 4.73 min/Wh (or 4.8 min/Wh with a larger 90Wh battery). There’s certainly variance among the laptops, more than we’d attribute to LCD size or other factors. The question then is where the XPS 15z places, and thankfully it does much better than the XPS 15.
Dell’s XPS 15z not only beats the XPS 15, but it also leads most other Optimus enabled SNB laptops that we’ve tested. The ASUS K53E still wins out for dual-core SNB laptops (it’s not shown in the above charts, but you can see the comparison in Bench), but the only other SNB system to match/exceed the 15z is the Alienware M11x R3—a smaller laptop with a ULV processor. Idle battery life is over 7.5 hours, and if you want to drop the LCD below 100 nits (we tested at 33% brightness), you could probably hit eight hours. For more reasonable use cases, Internet browsing battery life is still an impressive 6+ hours, and H.264 playback from the HDD lasts over four hours.
In terms of modern laptops (e.g. excluding Atom netbooks and older CULV offerings), the only laptops that get better relative battery life than the XPS 15z are equipped with Brazos or Llano, or the already mentioned ASUS K53E and Alienware M11x R3. That puts the 15z in good company as far as operating off the mains is concerned. Of course, if we want to bring OS X into the picture, you’ll still have a hard time matching the 9+ hours the MBP13/15 can reach, but run Windows 7 on a MacBook and you’ll get substantially worse battery life. Unless you want/need more than six hours unplugged time, the XPS 15z should have you covered—at least until your battery starts wearing out and you have to pry open the chassis.
Facebook
Twitter
RSS
76 Comments
View All Comments
ptuttle - Friday, September 2, 2011 - link
The problem was even when i was using a mouse with it, it would still do the same thing while i was typing. I don't beleive it was from brushing up against the touchpad either. When i would be typing the cursor would move around almost like it was from the vibration. Dell finally admitted that it was a defect in the system so they know what the problem is, they just haven't fixed it.ptuttle - Friday, September 2, 2011 - link
I will admit that performance wise the system was very nice, my main complaint was the touchpad. I mainly used it for business and while on a business trip i would play some games on it while stuck in a hotel room. I played some league of legends on it and got 60fps in medium settings. Rift would play in Medium/High settings at 30-40fps. So performance is nice they just need to fix some of the issues such as the touchpad.tipoo - Friday, September 2, 2011 - link
Its nice that you included the decibel reading for this laptop, I've wanted to know that in a few laptop reviews, thanks. It would be nice to have some reference points though, for instance you said the MBP gets louder at load but how loud is that? Did you test it with the decibel meter? And which is quieter during basic tasks like web browsing?JarredWalton - Friday, September 2, 2011 - link
I don't have dB results from the MBP, at least not for the same environment and equipment. I've heard the MPB15 in person under load, though, and it's pretty darn loud subjectively. At low loads, I think I hear the spinning HDD as much as the fan. 31dB is pretty close to the limit of my SPL meter, as well as my environment.tipoo - Friday, September 2, 2011 - link
What about sound during mainstream tasks like web browsing, youtube, etc? My Dell is two years old and the fan becomes audible just with those tasks. In my experience with modern MBP's, during those things they are barely audible. I'd like to know how a more modern Dell system competes.darwinosx - Friday, September 2, 2011 - link
I don't know why you are so obsessed with comparing this to a MacBook Pro but the fact is many of us want nothing to do with Windows.You also say nothing about service and support and Apple blows Dell away here.
araczynski - Friday, September 2, 2011 - link
but personally i find the speaker grill/mess by itself just completely making the thing look ugly. the rounded keys don't help, nor does the smaller keyboard. but hey, at least they got the body looking decent.bji - Friday, September 2, 2011 - link
I guess you're the editor so you can choose what you want to give an award to, but I didn't see a single thing about this laptop that definitively puts it above any of the other similarly spec'd laptops you have reviewed recently. And the keyboard on this Dell is the most laughable one I have seen on any computer in quite a long time. That alone would send this laptop to the bottom of the pile in my book.Also the styling is butt ugly. There is no creativity or, well, style. Just a generic looking shell and some ugly rectangular speaker grills and fan grills placed in conspicuous locations.
Others in this forum have mentioned poor Dell support; I can't speak to that, but I don't think that a laptop with a history of poor support should get an editor's choice award.
Glossy screen, with only one resolution upgrade option? How is this better than other laptops with a much better choice of screen resolutions + matte options? Answer, it is not.
Can you please explain why you decided to pull out the editor's choice award for this model as opposed to the other laptops you have reviewed lately? It looks very arbitrary, and with so much going against this crappy Dell laptop, really leaves one wondering what is going on.
JarredWalton - Friday, September 2, 2011 - link
Because ultimately, out of the dozens of laptops I've looked at in the past six months, I really enjoyed using the XPS 15z more than a lot of the others. Clevo? No thanks! Toshiba, Acer, MSI, ASUS... they all have areas I'm not happy about. Even if the design is similar to the MBP, that doesn't make it bad. It's a "poor man's MBP", and that's exactly what a lot of people would like to get. Good screen, good battery life, comfortable to use for every day tasks, and fast enough for anything beyond high quality gaming and serious number crunching. This is a laptop I'd like to hold onto and use as my "work laptop" if I could -- and I wouldn't say that about 90% of the laptops I test.bji - Friday, September 2, 2011 - link
Sorry to have to hound on this topic, but can you give some more specifics?The charts show that the Dell is middle-of-the-pack in performance; so that's not an advantage to the Dell. The Dell screen does seem to be good but the Clevo screen you reviewed recently was as good. In the article you lamented the thinness and flexiness of some of the enclosure and that would seem to be contrary to the position that the laptop is more pleasurable to use than others.
Honestly, reading between the lines it really feels like you really just like the Macbook styling and design and are giving the Dell an editor's choice because it's "kind of like a Macbook".
I believe you when you say that you like using the laptop more than 90% of others you have tested, and having myself bought a Clevo recently purely because of the specs and price, and then selling it at a loss two months later because it was just so unpleasant to use, I absolutely understand the value of that intangible quality of a laptop that makes it pleasurable to use. No matter how great a laptop performs or how good its specs are, if it's unenjoyable to use, it will sit on the shelf with other options taking preference wherever possible (I found myself constantly pulling out my 6 year old Panasonic Toughbook Y2 because I just couldn't stand to use the Clevo, and that convinced me that I needed to get rid of that Clevo ASAP, which I did).
It feels like you've given the Dell an editor's choice based on personal preference, not a more objective conclusion based on the merits of the laptop itself. If someone was not enamored with Macbook design above all else, would they still prefer the Dell over another offering? Is there something about the Dell that makes it better than other PC laptops? If you had never seen a Macbook before and you were comparing this Dell to other PC laptops, would you still conclude that the Dell is better?
I have nothing against Apple, or against PC laptops either; I'm not saying these things because I think that there is something inherently inferior (or superior) about a laptop that takes its styling cues from Apple. I just wonder what exactly there is about this Dell that earns it an editor's choice when I can't see anything in pictures or in the review that makes it obviously better than other PC laptops.
BTW, the Samsung 7 series posted about recently really looks like a *much* better effort at imitating the Apple look and feel. I hope you get an opportunity to review one of those soon.