Dell XPS 15 L521X: A Detailed First Look
by Jarred Walton on July 25, 2012 1:10 AM ESTDell XPS 15 LCD: Decent Contrast and Brightness, Mediocre Colors
Dell’s XPS line has had a bit of an on-again, off-again relationship with good LCDs. The M1710 and M1730 way back in the day had good WUXGA panels for the time, and the Studio XPS 16 was the first laptop to offer an RGB LED backlit panel (at least to my knowledge). More recently, the XPS 15 and 15z 1080p panels have been good, but the 768p displays in the XPS 13, 14, 14z, 15, and 15z have all been run of the mill offerings. Thankfully, the new XPS 15 sticks with the pattern of offering a decent 1080p display. It’s not great and has a definite bluish tint, but contrast is pretty good. If you don’t demand accurate colors (which is easily answered by answering this question: do you own a hardware colorimeter?), then the XPS 15 should be good enough to keep you happy. Even with a colorimeter, however, color accuracy remains relatively poor compared to other panels.
Contrast checks in at 677:1, which is better than average but not exceptional. The maximum white level is 350 nits, but that’s with a very strong blue component. Once you calibrate to remove that, the maximum white level drops substantially down to just 250 nits. If you prefer “cool” colors, the LCD will probably make you happy, but those who prefer natural or warmer colors will immediately notice something is off. As noted above, delta E even after calibration is quite poor—just like the XPS 15z. That would make sense, as the two models appear to use the same AU Optronics B156HW03 panel. Color gamut is likewise middling, at 57% of Adobe RGB.
The minor complaints with the panel continue when we look at viewing angles. I’ve seen some TN panels that do a lot better in terms of vertical viewing angles; this LCD isn’t one of those. Viewed from above or below, you get severe color shifting and loss of contrast. There’s still a decent viewing arc where the LCD looks good, but this is on the lower end of the 1080p LCDs that we’ve tested. I also noticed a fair amount of “shimmer” on the edges of windows when moving them around, which appears to come from the 6-bit to 8-bit color interpolation. That’s almost always present to varying degrees, but here it’s as noticeable as on lesser LCDs like that in the Acer V3-571G.
While the IPS panels in laptops like the UX21A, Sony VAIO SE, HP Envy 15, and Lenovo X220 aren’t perfect by any means, they’re still a substantial upgrade from panels like this—and this panel in turn is a substantial upgrade from the poor quality 1366x768 panes. We’d love to see more vendors push for IPS panels, and that goes double (triple even!) for high-end laptops like this XPS 15. If you’re paying under $1000 for a laptop, we understand the need to make some compromises, but ASUS has managed to get 1080p IPS displays into their new 11.6” and 13.3” Ultrabooks so there’s really no excuse for using a lower quality TN panel in a $1300+ laptop. And it almost goes without saying that Apple’s new 2880x1800 Retina MacBook Pro is in a league of its own.
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tipoo - Wednesday, July 25, 2012 - link
It just seems strange that they would ship a laptop which throttles in just minutes, this isn't even a super small ultrabook, it's a standard sized laptop. Maybe there's a problem with the physical seating of the heatsink? Or a BIOS issue maybe?JarredWalton - Wednesday, July 25, 2012 - link
They're working on the BIOS. I wondered about the problem being specific to my unit as well, but there are a lot of users reporting similar issues right now so that doesn't seem to be the case.dragosmp - Thursday, July 26, 2012 - link
Thanks for the reply. I missed the point of it throttling only when using both CPU and GPU.It makes sense that they'd size the cooling for a "typical" TDP and not for the 100%TDP. This is usual practice when sizing cooling systems for high end products, by the same rationale you'd get a huge ugly stuff if one were to size the cooling radiators for a Ferrari for the airflow @20MPH New York traffic without the ECU reducing power. It is form over function and I would prefer to have the cake and eat it too, but this perfectly acceptable in my opinion. I probably misread that one can't use the CPU by itself without throttling, that would be unacceptable.alfling - Thursday, July 26, 2012 - link
lol you can't play 10 minutes without throttlestop...acceptable? whith that price??CeriseCogburn - Sunday, July 29, 2012 - link
The point is "fanboys". Thus it will be marketed and sold.nerd1 - Wednesday, July 25, 2012 - link
I've been a fan of anand site but I think it's getting bit ridiculous.I don't think this laptop will have lot worse thermal compared to MBP or rMBP - Why I cannot see any 'torture' test on MBPs, like bootcamp + CPU benchmark + GPU benchmark? Many of my friends have MBP and I know they are toasty enough, and some reviewer reported throttling issue with rMBP with such a test.
And please compare apple to apples. How much apple charge for RAM or HDD upgrade? (It is plain stupid they are still using 5400rpm drive I think) How much does it cost to get SSD+HDD setup or blueray drive for macbooks? How much does it cost to upgrade macbook screen to 1680*1050? How easy is it to get discount coupons for them?
In practice, you can get a good windows laptop (like the new xps 15) at around $1200 (with easy-to-acquire coupons) and you have to pay full retail price of around $2000 for similarly spec'ed macbook pro 15. I do own a MBA (Which I think is still price-competitive) but all the MBP lines are just plain ripoff.
JarredWalton - Wednesday, July 25, 2012 - link
Give me a break. I am one of the least pro-Apple people around, as I really dislike OS X -- just ask Anand. I do a price comparison on the front page showing how they stack up and conclude that in many areas Dell has the lead. What about throttling on Apple laptops? Well, sadly I'm not the one doing MBP reviews so I can't run those tests. What I can tell you is that Vivek repeatedly ran HL2:EP2 on the latest MBP15 to see if there was any drop in frame rates:http://images.anandtech.com/doci/6037/MBP12-HL2End...
If I made a chart like that for the current A04 BIOS on the XPS 15, there would be a cliff after the first run, dropping from 160FPS to around 80FPS. But hopefully Dell can address that with the next BIOS. Will MBP15 throttle under a stress test workload? I'm almost sure it will, but perhaps not as badly as the XPS 15 right now. What about the Retina MBP? Well, that's a different beast with two fans and apparently significantly improved cooling, and early results suggest it doesn't have any issues with throttling.
Apple makes some very compelling laptops, but ultimately the only reason I would ever consider one is if I were willing to run OS X. I'm not, and thus laptops like the XPS 15 are very much something I want to succeed. A bit more fine tuning and hopefully Dell will get there, as the throttling is the biggest issue I have right now. (The only other major complaint I have is the good but not great LCD.)
nerd1 - Wednesday, July 25, 2012 - link
I just wanted to point out macbook are way more expensive in practice.And I don't think HL2:EP2 is a good benchmark for throttling - I'm pretty sure even internal graphics are sufficient to run them flawlessly these days. One german site used bootcamp and prime95 and they succeeded to make rMBP throttle at 1.2Ghz.
headbox - Wednesday, July 25, 2012 - link
How about doing a RESELL price comparison?! You whine about Apple MBP cost, but in 2 years you can sell it for around 80% of what you paid for it, and tons of people will bid/call you about it. Sell a two-year-old Dell... that phone won't be ringing much, and you'll be lucky to get 50% of what you paid for it. I had the first gen unibody MBP- got it for $1800 and sold it 2.5 years later for $1500 within a couple hours of posting it on craigslist. Try to do that with a "cheaper" PC.alfling - Thursday, July 26, 2012 - link
Someone who buys a 2-year-old used laptop for 80% of its original price (whatever laptop it is) is just a total idiot, no doubts about this. I guess it's full of idiot apple customers out there