Dell XPS 15 L502X vs Dell XPS 16 9640

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XPS 15 L502X compared with XPS 16 9640

	DellXPS 15 L502X	DellXPS 16 9640
Overview
Released
Released	2011	February 2024
Display
Screen size
Screen size	15.6″	16.3″
Resolution
Resolution	1920 × 1080	1920 × 1200 or 3840 × 2400 (better)
Panel
Panel	–	IPS LCD or OLED
Refresh rate
Refresh rate	60 Hz	120 Hz or 90 Hz (better)
Brightness
Brightness	–	500 nits or 400 nits
Touchscreen
Touchscreen	No	No or Yes
Display type
Display type	15.6-inch TrueLife LCD; main Full HD RGBLED screen. HD WLED and HD multi-touch WLED options also appear in Dell's setup guide; 1366 × 768 HD resolution confirmed by Notebookcheck	FHD+ (1920 × 1200) WLED, non-touch, anti-glare, 30–120 Hz; or UHD+ (3840 × 2400) OLED touchscreen with passive pen support, anti-reflective and anti-smudge, 48–90 Hz
Pixel density
Pixel density	–	139 ppi (LCD); 278.1 ppi (OLED)
Colour range
Colour range	–	100% sRGB (LCD); 100% DCI-P3 (OLED)
Screen finish
Screen finish	Glossy TrueLife surface	Anti-glare (LCD); anti-reflective, anti-smudge (OLED)
Display features
Display features	60 Hz refresh and up to 135° opening in the maker guide. Notebookcheck measured 262.2 cd/m² average brightness on the tested Full HD panel; maker brightness is not published	2000:1 contrast, 35 ms response (LCD); OLED 400 nits typical, 1,000,000:1 contrast, 1 ms typical response; Eyesafe hardware low blue light
Performance
Processor
Processor	Intel Core i5-2410M	Intel Core Ultra 7 155H or Intel Core Ultra 9 185H
CPU cores
CPU cores	2	16
CPU threads
CPU threads	4	22
Graphics
Graphics	NVIDIA GeForce GT 540M	Intel Arc Graphics or NVIDIA GeForce RTX 4070
AI engine (NPU)
AI engine (NPU)	–	11 TOPS
Memory
Memory	4 GB	16 GB or 64 GB (better)
Storage
Storage	500 GB	512 GB to 4 TB (better)
CPU
CPU	Second-generation Core i3, i5 or i7 options with Intel HM67 chipset. Listed Core i5-2410M, 4 GB, 500 GB and Full HD pairing is the exact April 2011 European Notebookcheck configuration	Intel Core Ultra 7 155H (up to 4.8 GHz), Core Ultra 7 165H (up to 5 GHz) or Core Ultra 9 185H (up to 5.1 GHz); 16 cores, 22 threads; up to 55 W (integrated graphics) or 20 W + 60 W CPU and GPU in Ultra Performance mode
GPU
GPU	Intel HD Graphics with NVIDIA Optimus; GeForce GT 525M with 1 GB DDR3 or GeForce GT 540M with 2 GB DDR3	Intel Arc Graphics; or NVIDIA GeForce RTX 4050 (6 GB GDDR6), RTX 4060 (8 GB GDDR6) or RTX 4070 (8 GB GDDR6)
AI engine
AI engine	–	Intel AI Boost NPU
Memory type
Memory type	DDR3-1066 or DDR3-1333; two user-accessible SO-DIMM slots, 2 GB minimum and 8 GB maker maximum	LPDDR5X, soldered; 16 GB at 6400 MT/s (Intel Arc); 16, 32 or 64 GB at 6400 MT/s (RTX 4050 and 4060); 32 or 64 GB at 7467 MT/s (RTX 4070)
Storage type
Storage type	Listed configuration has a 500 GB 7200 rpm SATA hard drive and Blu-ray combo drive. Hard-drive replacement requires further disassembly than the memory cover, according to Notebookcheck	One M.2 slot; 512 GB or 1 TB M.2 2230, or 1, 2 or 4 TB M.2 2280, PCIe Gen 4 NVMe SSD
Battery and size
Battery capacity
Battery capacity	–	99.5 Wh
Weight
Weight	–	2.13 kg
Thickness
Thickness	38.2 mm	18.7 mm (better)
Width × depth
Width × depth	381 × 265.4 mm	358.18 × 240.05 mm
Battery life detail
Battery life detail	Six-cell or nine-cell lithium-ion packs, 11.1 V; maker does not publish capacity or a fixed runtime. Notebookcheck identifies its nine-cell pack as 90 Wh. Maker says configurable to less than 2.8 kg with six-cell battery; no exact minimum weight is published. Body height varies from 32.2 to 38.2 mm, and the nine-cell pack raises it further	99.5 Wh 6-cell lithium-ion
Charger
Charger	90 W or 130 W adapter; 100–240 V AC input	130 W USB-C adapter
Fast charging
Fast charging	Approximately four hours with the computer switched off	ExpressCharge; full charge in about 2 hours with the laptop off
Materials
Materials	Aluminium surfaces and silver finish described by Notebookcheck	CNC-machined aluminium; Gorilla Glass 3
Colours
Colours	–	Graphite or Platinum
Connections
Ports
Ports	3 × USB-A, HDMI, Ethernet, SD card slot, 2 × headphone jack	3 × Thunderbolt 4, microSD slot, headphone jack
Wi-Fi
Wi-Fi	Wi-Fi a/b/g/n, depending on installed module	Wi-Fi 7
Bluetooth
Bluetooth	Optional Bluetooth	5.4
Webcam
Webcam	2 MP, 720p video	1080p with IR
Operating system
Operating system	Windows	Windows
Port detail
Port detail	Two USB 3.0 Type-A and one eSATA/USB combo with PowerShare, HDMI, Mini DisplayPort, Gigabit Ethernet, headphone output, headphone/digital S/PDIF combo and microphone input; nine-format card reader. Optional TV tuner with MCX antenna connector, WWAN, WiMAX and WiDi depend on configuration	3 × Thunderbolt 4 USB-C with USB4, DisplayPort and Power Delivery (RTX 4070 models have 2 × Thunderbolt 4 on the left and 1 × USB 3.2 Gen 2 USB-C on the right); microSD card reader (v6.0); 3.5 mm headset jack; no lock slot
Keyboard
Keyboard	QWERTY, AZERTY or Kanji; 87 keys on European layout, optional backlighting	Backlit zero-lattice keyboard; capacitive touch function row; Copilot key
Trackpad
Trackpad	100 × 56 mm active area with separate buttons and multi-touch gestures	Seamless glass haptic touchpad, 148 × 90 mm
Speakers
Speakers	Two 4 W main speakers and 12 W subwoofer; Realtek ALC665 audio controller	Quad speakers (two woofers at 3 W, two tweeters at 2 W)
Microphones
Microphones	–	Digital-array microphones
Biometrics
Biometrics	–	IR camera for Windows Hello face recognition; fingerprint reader in the power button