T420 Memory Slots

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T420
  1. Lenovo ThinkPad T420 - 14' - Core i3 2310M - 4 GB RAM - 320 GB HDD 4177x07 Lenovo ThinkPad T420 Intel Core i5-2430M (2.40GHz, 3MB L3, 1333MHz) 4177qju Lenovo ThinkPad T420 Intel Core i3-2350M (3M.
  2. Upgrading memory on a Thinkpad 420 is very easy. When Lenovo installs the base level of memory in a Thinkpad, it only uses one memory slot so it is inexpensive to upgrade the laptop to 8GB by purchasing one more 4GB DIMM — and the second slot is very easy to access.
  3. Well, I'm ordering the T420 with stock RAM and upgrading myself. Problem is I don't know which type to get? There's different speeds and different pins like 200-pin. I just don't know which type of RAM is compatible with the T420. Anyone can shed some light on this is greatly appreciated!

Again, brand does not matter.At all. The only thing that different brands of RAM offer are different labels. Ostensibly some brands have different QC than others, but that doesn't really matter; this isn't like hard drives where QC affects the lifespan of the product - either the RAM works and passes memtest, in which case you keep it, or it doesn't, in which case you. When I choose RAM for my machines, I try to buy certified modules. I plan to buy Kingston modules for which Kingston certifies the compatibility with the T420s. The reference is KCP313SD8/8 (you can use two of those to have 16 Gb in your Thinkpad).

ThinkPad T420

This page gives an overview of the ThinkPad T420.

Standard Features

  • One of the following processors:
    • Intel® Core™ i3-2310M (2.1GHz, 3MB L3, 1333MHz FSB)
    • Intel® Core™ i5-2410M (2.3GHz, 3MB L3, 1333MHz FSB)
    • Intel® Core™ i5-2450M (2.5GHz, 3MB L3, 1333MHz FSB) (Without vPro)
    • Intel® Core™ i5-2520M (2.5GHz, 3MB L3, 1333MHz FSB)
    • Intel® Core™ i5-2540M (2.6GHz, 3MB L3, 1333MHz FSB)
    • Intel® Core™ i7-2620M (2.7GHz, 4MB L3, 1333MHz FSB)
    • Intel® Core™ i7-2640M (2.8GHz, 3MB L3, 1333MHz FSB)
  • One of the following graphics adapters:
    • Intel Integrated HD Graphics 3000
    • Discrete NVIDIA NVS 4200M (1GB VRAM) with Optimus™ Technology
  • One of the following TFT displays:
    • 14.0' HD (1366 x 768) (230 NITS)
    • 14.0' HD+ (1600 x 900) (230 NITS)
  • Up to 16GB DDR3 - 1333MHz (2 DIMM Slots)
  • One of the following storage options:
    • 160GB (7200rpm)
    • 250GB (5400rpm/7200rpm OPAL)
    • 320GB (5400rpm/7200rpm)
    • 500GB (7200rpm)
    • Intel 80GB Micro Solid State Drive, Serial ATA
    • 128GB Solid State Drive, Serial ATA
    • Intel 160GB Solid State Drive, Serial ATA
  • One of the following WLAN adapters:
    • ThinkPad BGN (RealTek - Stockton) 1x1 BGN
    • Intel Centrino Wireless-N 1000 (Condor Peak) 1x2 BGN
    • Intel Centrino Advanced-N 6205 (Taylor Peak) 2x2 AGN
    • Intel Centrino Ultimate-N 6300 (Puma Peak) 3x3 AGN
  • One of the following LAN adapters:
    • Intel® 82577LM Gigabit (Hanksville) Digital Office
    • Intel® 82577LC Gigabit (Hanksville) Fundamental
  • One of the following WWAN adapters:
    • Gobi™ 3000 Sierra Wireless EV-DO/HSPA WWAN Minicard
    • Ericsson HSPA+ WWAN Minicard (F5521gw)
  • Battery
    • ThinkPad Battery 55+ (6 Cell Lithium-Ion, 57 Watts/Hr)
    • ThinkPad Battery 55++ (9 Cell Lithium-Ion, 94 Watts/Hr)
    • ThinkPad Battery 27++ Slice (9 Cell Lithium-Ion, 11.1 V, 8.4 Amp/Hr)
  • Internal PCIe slots: 1 Full (51mm) and 1 Half (27mm)
    • Half slot supports mSATA SSD or WWAN
  • USB x 4: 1 Always-On USB 2.0, 2 USB 2.0, 1 USB 2.0/eSATA Combo
    • Unlike the T420s, the T420 lacks USB 3.0
    • ExpressCard USB 3.0 Adapter is an alternative
  • Size: 13.4in x 9.05in x 1.18-1.20in
  • Weight: < 4.84 lbs (2.2 kg)

Resources

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Issues

The Optimus models, will not power off the NVidia GPU even if you are only using the integrated Intel GPU. To power it off, and make the machine run cooler, and much longer on battery you need to manually disable it. See how in Switchable Graphics.

Lenovo T420 Max Ram

Pages in category 'T420'

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