Comparison Criteria Summary multimedia performance memory display details peripherals general information networking storage battery ports others	X Lenovo Thinkpad X240 (20ALA0K-WIG) Ultrabook (Core i5 4th Gen/4 GB/1 TB/Windows 8)	X Lenovo Thinkpad X260	X
Summary
storage 1 TB HDD 512 GB SSD processor Intel Core i5 (4th Gen) Processor Intel Core i7 (6th Gen) Processor display 12.5' (31.75 cm) display, 1366 x 768 px 12.5' (31.75 cm) display, 1366 x 768 px ram 4 GB DDR3 RAM 8 GB DDR4 RAM
secondary camrearfacing inbuilt microphone sound technologies Dolby Advanced Audio Dolby Advanced Audio v2 webcam audio solution HD Audio Solution HD Audio Solution speakers Stereo Speakers -
performance
clockspeed 1.6 Ghz 2.5 Ghz graphic processor Intel HD 4400 Intel HD chipset Intel HM87 Express - processor Intel Core i5-4200U (4th Gen) Intel Core i7-6500U (6th Gen)
ram type DDR3 DDR4 memory layout 1 x 4 Gigabyte 1 x 8 Gigabyte memory slots 1 DIMM - expandable memory 8 GB - capacity 4 GB 8 GB
display details
display type LED LCD display size 12.5 Inches (31.75 cm) 12.5 Inches (31.75 cm) display resolution 1366 x 768 Pixels 1366 x 768 Pixels display touchscreen display features HD LED Anti-glare HD display HD LCD display with IPS technology
keyboard ThinkPad Precision Keyboard Standard Keyboard backlit keyboard - pointing device Touchpad with Multi-touch Gesture Support Touchpad with Multi-touch Gestures support fingerprint scanner
general information
dimensionswxhxd 305 x 208 x 20.3 mm 305 x 208 x 20.3 mm operating system type 64-bit 64-bit weight 1.3 Kg 1.3 Kg operating system Windows 8 Windows 10 model X240 (20ALA0K-WIG) X260 (20F5A050IG) brand Lenovo Lenovo colors Black Black
wireless lan 802.11 b/g/n 802.11 a/b/g/n/ac bluetooth bluetooth version 4.0 4.1
storage
hdd speedrpm 5400 RPM - hdd capacity 1 TB - hdd type SATA -
battery life 9 Hrs - battery cell 6 Cell Cell 6 Cell battery type Li-Ion Li-Ion
ports
sd card reader vga port usb 30 slots 2 2 microphone jack headphone jack usb 20 slots 1 -
sales package Laptop, Battery, AC Adapter, User Guide Ultrabook, Battery, AC Adapter, User Guide warranty 1 Months 3 Years
More Details
Price ₹ 90,197 ₹ 114,480 Details Full Details » Full Details »

Hi guys,
I got a few questions regarding upgrade of my X240. I learnt that X240 has 2 slots for M.2 SSD. One is occupied by a 16GB SSD cache drive (this is what I find in my device manager) and the other is for WIFI card. I wanna replace the 16G SSD with a new SSD as windows drive, keep the HDD and upgrade to 8GB ram as 16GB is not supported.

Lenovo Thinkpad X240 (20ALA0K-WIG) Ultrabook (Core i5 4th Gen/4 GB/1 TB/Windows 8) vs Toshiba Portege R830-I3310 Ultrabook comparison on basis of storage, processor, display, ram, reviews & ratings and much more with full phone specifications at Gadgets Now. Product Features Manufacturer/Model: Lenovo ThinkPad X240 Processor: Intel i5 Dual Core Gen 4 2.10 GHz Memory Installed: 8GB DDR3 Maximum Memory: 16GB Memory Slots: 2 Slots Hard Drive: 320 Optical Drive: Not Installed Video Card: Integrated/On-Board Graphics Screen Size: 12.5' Battery Life: Battery is the original battery and tested to hold a. A number of slots (Wi-Fi, M.2), the drive bay, the fan system and one memory bank can be found below this maintenance hatch. Unfortunately, this is indeed the only RAM slot on board, being occupied. A number of slots (Wi-Fi, M.2), the drive bay, the fan system and one memory bank can be found below this maintenance hatch. Unfortunately, this is indeed the only RAM slot on board, being occupied.

My questions are:
1. Is it any 2242 m.2 SSD with be OK? Which model is crecommended? 128GB or 256GB?

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2. Some said the slot is for cache drive only. Is it really OK use it for windows drive?