Guaranteed compatible upgrades for:

Sony VAIO VGN-T Series VGN-TT198U/B

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Crucial 4GB (1x 4GB) CL7 DDR3L-1066 PC3L-8500 1.35V / 1.5V DR x8 204-pin SODIMM RAM Module for Mac (or PC)

Crucial 4GB (1x 4GB) CL7 DDR3L-1066 PC3L-8500 1.35V / 1.5V DR x8 204-pin SODIMM RAM Module for Mac (or PC)

System Specifications

Maximum Memory:

4 GB using a 32-bit Operating System
8 GB using a 64-bit Operating System

Expansion:

2 Sockets

Standard Memory:

2 GB (Removable) or
3 GB (Removable) or
4 GB (Removable) or
6 GB (Removable)

CPU/Chipset:

Intel Core 2 Duo 1.4 GHz Intel GS45

Bus Architecture:

USB

Upgrade Path:

Virtually any configuration up to 8GB can be reached using 1, 2, and 4GB modules.

Comments:

If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation).
Maximum configurations require a 64-bit operating system