Dell XPS 15 L521X: A Detailed First Look
by Jarred Walton on July 25, 2012 1:10 AM ESTDell XPS 15 Battery Life
Dell uses a 9-cell, 65Wh integrated battery in the XPS 15 that’s not user replaceable, which is similar to what we’ve seen in the previous generation XPS 15z as well as the MacBook Pro 15. Apple uses a higher capacity battery, and under OS X the MBP15 will generally offer superior battery life, but unless something has changed since our last look we would expect greatly decreased battery life under Windows via Boot Camp. Since the XPS 15 is designed to run Windows from the ground up, there isn’t a problem with lack of power optimizations, and the result is competitive battery life. The LCD was set to 50% brightness (109 nits) for our battery testing—or nine steps down from maximum if you’re using the keyboard shortcut.
Idle battery life is just over seven hours, with a normalized result putting the XPS 15 ahead of everything except Ultrabooks and AMD’s Trinity. Put a more typical load on the laptops, like our Internet test, and we’re at five hours of useful battery life. If you’re doing lighter web surfing with a mix of office applications, you can expect somewhere around six hours of battery life. As for video playback, Dell manages just over four hours of 720p H.264 decoding; 1080p H.264 decoding drops that slightly to around 3.5 hours. That’s actually one of the lower results for battery life considering the battery capacity, though it’s worth noting that playback on higher resolution displays ends up being more taxing as there are more pixels to push. Overall, then, battery life is good and will be sufficient for most people to get through a day’s work without plugging in, particularly if they let the LCD turn off and/or the laptop go to sleep during periods of inactivity.
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doubledeej - Monday, August 13, 2012 - link
I've bought Dells almost exclusively for 15 years and for the first time they don't offer a machine that meets my needs.I'm a developer, so I type an awful lot. And Dell, along with most other laptop manufacturers, seems to think that nobody actually does any editing on their computers any longer. The omission of dedicated Home, End, Page Up and Page Down keys kills productivity. Yes, I know there is a Fn+ keyboard combo to get to these... but it really hurts the brain when you have to start thinking about holding Control, Shift, and Fn before pressing the left arrow to highlight a document from the current location to the beginning... four keys for any operation is too many.
It saddens me that computer vendors don't think of their power users when designing machines. Who else are going to be their biggest cheerleaders?
alfling - Thursday, August 23, 2012 - link
still no review of Dell Inspiron 15R SE?alfling - Friday, August 24, 2012 - link
Dear Jarred Walton, can you please retest gaming with A06 BIOS?ogrfnkl - Saturday, August 25, 2012 - link
Well, the A06 BIOS update is out as of 8/8/2012, and according to the description on the Dell website, it does address some thermal issues. Specifically, it says: "Set the temps control Tc at 80 degree C for GPS on Sbios. Based on EC X43 version and cut in thermal table V08." Whatever the heck that's supposed to mean! :<It would be great to know whether or not, and to what extent, this update fixes the thermal and throttling issues described in the review. I hope Jarred can re-run the gaming tests and post the new results soon...
Thanks!
ogrfnkl - Saturday, August 25, 2012 - link
Sorry, sorry, I hadn't checked the previous messages -- the new testing has already been done. Thanks, Jarred!tipoo - Sunday, August 26, 2012 - link
http://forum.notebookreview.com/dell-xps-studio-xp...ogrfnkl - Sunday, August 26, 2012 - link
First of all, the thread you've pointed to is from BEFORE the 8/8/2012 A06 update, which is the fix "Dell-Bill_B" is talking about. Second, here is a post by "Dell-Bill_B" from a little further on in the thread (http://forum.notebookreview.com/dell-xps-studio-xp... which I think pretty much gives us the final answer on this whole thermal/throttling topic:"If you require a system that will run the CPU and GPU at 100% load concurrently for more than a few seconds, you bought the wrong system."
Doesn't get any clearer than that, does it? This pretty much nails it for me; I'm starting to look elsewhere for my next system... My question is, why would anyone NOT expect their computer to run at its top speed for a lot more than a few seconds? If it can't, that top speed is completely useless, isn't it? I'd much rather go for an L502x, whose top speed is a few % slower than the L521X's, but it actually CAN and does sustain it indefinitely. Not to mention the absolutely, mindblowingly gorgeous screen on that system.
stcloude - Sunday, October 14, 2012 - link
Dell is on revision A11 of the BIOS. Has this revision resolved the throttling issue at all? I am really disappointed that it has the throttling and wifi issues. I need a new laptop, and wanted something with the build quality of the MacBook Pro, and really thought this was it. I am so tempted to go with Mac, but unfortunately my job requires that I have a PC.Tobi KKKK - Thursday, November 22, 2012 - link
I am also interested in the throttling behaviour under load.Meanwhile, Dell has published A12 of the BIOS.
- Has this revision reduced or at least resolved the throttling issue?
- Do you recognize a progress from A06 to A12?
- Do you think Dell is able to solve the htermal issues via BIOS?
Could you please give it a try and tell us your assessment? Thank you very much!