My Thinkpad t450s has 8gb of RAM (4gb system, 4gb added). Since the t450s has one ram slot, I am considering replacing the 4gb RAM with a 12gb (8gb SODIMM) or 20gb (16gb SODIMM) chip. On Amazon, the Crucial single DDR3L 1600 MT/s (PC3L-12800) 8gb ram is $39, and 16gb is $157. Memory Speed Processor Graphics i5-5200U 24 2.2 GHz 2.7 GHz 3MB DDR3L-1600 Intel HD Graphics 5500 i5-5300U 2.3 GHz 2.9 GHz 3MB i7-5600U 2.6 GHz 3.2 GHz 4MB Graphics Intel HD Graphics 5500 in processor only, or Intel HD Graphics 5500 in processor and NVIDIA GeForce® 940M, 1GB memory (discrete models are only available in Western Europe). A ThinkPad T450s comes with a 2.5' internal drive bay and a M.2 slot - currently my M.2 slot isn't used. Picking an M.2 SSD. M.2 SSDs come in a variety of different form factors. The ThinkPad T450s takes a 2242 form factor M.2 drive. I picked a Transcend MRS400S M.2 2242 128GB SSD. Fitting the M.2 drive will only take you a few. ThinkPad® T450s Ultrabook; Operating System: Windows 8 Pro preinstalled through downgrade rights in Windows 10 Pro: Processor: Intel® Core™ i7-5600U Processor (4M Cache, up to 3.20 GHz) Intel® Core™ i5-5300U Processor (3M Cache, up to 2.90 GHz) Intel® Core™ i5-5200U Processor (3M Cache, up to 2.70 GHz) Graphics: Integrated with docking.

1. Thinkpad T450s Ram Upgrade
2. Lenovo T450s Ram Slots

I'm looking to order a T450s and have a few questions about options when configuring the order:
http://shop.lenovo.com/us/en/laptops/th ... ies/t450s/
1080 Display -- Does anyone know if the 1080 display (non-touch) is made by LG or AUO or someone else? There was extensive discussion about the T440s, and people got different brands and the AUO was the preferred brand.
16GB m.2 NGFF SSD -- If I remove this option, and want to add a 3rd party compatible NGFF SSD later, can I do this?
3rd m.2 SSD Slot -- The options are None, 3rd m.2 SSD slot, or Smart Card Reader. If I select the Smart Card Reader option, can I later remove the Smart Card Reader and use it as a 3rd m.2 SSD slot? Or, if I select 3rd m.2 SSD slot and later want to use it for a Smart Card Reader, can I buy a Smart Card Reader and plug it into the slot?

Machine Type

• Broadwell: 20BW, 20BX

Standard Features

Dimensions:

• Size:
  • Models without touchscreen: 331mm x 226mm x 20.6mm (13.0' x 8.90' x 0.81')
  • Models with touchscreen: 331mm x 226mm x 22.9mm (13.0' x 8.90' x 0.90')
• Weight:
  • Starts from 1.32kg (2.9lbs) with only external 3-cell Li-ion battery (23Wh)
  • Discrete GPU option adds 0.24kg (0.53lbs)
  • Internal battery option (3-cell Li-polymer, 23Wh) adds 0.11kg (0.24lbs)
  • 6-cell external battery option (Li-ion, 48Wh) adds 0.18kg (0.40lbs)
  • 6-cell external battery option (Li-ion, 72Wh) adds 0.18kg (0.40lbs)

Color:

• Black

Features:

• CPU: one of the following ULV processors
  • Intel Core i5-5200U, 2.2 - 2.7 GHz, 3MB Cache
  • Intel Core i5-5300U, 2.3 - 2.9 GHz, 3MB Cache
  • Intel Core i7-5600U with vPro, 2.6 - 3.2 GHz, 4MB Cache

• RAM:
  • 4GB DDR3L-1600 (PC3L-12800) soldered to the systemboard
  • One free socket supporting up to 8GB DDR3L SO-DIMM

• GPU:
  • Intel HD Graphics 5500 integrated into CPU

• Maximum supported resolution on external monitor:
  • 3840x2160@60Hz via mDP
  • 1920x1200@60Hz via VGA

• Display: one of the following IPS anti-glare displays with LED backlight, 700:1 contrast ratio and 160° viewing angle
  • 14.0' 1600x900 ('HD+'), 250 nits, 400:1 contrast ratio
  • 14.0' 1920x1080 ('FHD'), 300 nits, 700:1 contrast ratio
  • Multitouch option available

• Storage: one of the following
  • SATA 3 SSD, 7mm high
  • SATA 3 HDD, 7mm / 9mm high
  • SATA 3 SSHD
  • Optional M.2 SSD

• M.2 slot with one of the following
  • Thinkpad 11b/g/n 2x2 Wi-Fi + Bluetooth combo adapter
  • Intel Wireless-N 7265 2x2 Wi-Fi + Bluetooth card
  • Intel Dual Band Wireless-N 7265 2x2 Wi-Fi + Bluetooth card
  • Intel Dual Band Wireless-N 7265 2x2 Wi-Fi + Bluetooth card

• M.2 slot with one of the following options
  • Ericsson® N5321 WWAN card with HSPA+ 21Mbps/GSM/GPRS/EDGE and GPS
  • Sierra Wireless EM7345 WWAN card with 4G LTE/HSPA/GSM/GPRS/EDGE and GPS

• • Qualcomm Snapdragon X7 LTE-A (Sierra Wireless EM7455), LTE-Advanced/DC-HSPA+/HSPA+/HSPA/UMTS/GNSS

• SIM card slot

• Ethernet: one of the following
  • Intel I219-V
  • Intel I219-LM (vPro models)

• 720p HD Integrated camera

Thinkpad T450s Ram Upgrade

• Batteries:
  • 3-cell internal Li-ion battery, 23Wh (option)
  • 3-cell external Li-ion battery, 23Wh
  • 6-cell external Li-ion battery, 48Wh (option)
  • 6-cell external Li-ion battery, 72Wh (option)

• Power adapter: one of the following with slim Lenovo charging port
  • 45W AC adapter
  • 65W Slim AC adapter
  • 65W AC adapter

• Security features
  • Kensington lock slot
  • TPM module
  • Integrated Fingerprint Reader (optional)

• Pointing devices
  • TrackPoint (with 3 physical buttons)
  • UltraNav touch pad

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Lenovo T450s Ram Slots