Corsair CMSA8GX3M2A1333C9 Apple Certified 8GB (2x4GB) DDR3 1333 MHz

Corsair CMSA8GX3M2A1333C9 Apple Certified 8GB (2x4GB) DDR3 1333 MHz (PC3 10666) Laptop Memory 1.5V

Corsair CMSA8GX3M2A1333C9 Apple Certified 8GB (2x4GB) DDR3 1333 MHz (PC3 10666) Laptop Memory 1.5V

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  • Capacity: 8GB (2 x 4GB)
  • Speed: 133MHz CL9; Timing: 9-9-9-24 (1333MHz); Pin Out: 204 Pin
  • Voltage 1.5V; Latency: CAS 9, Lifetime Warranty
  • Tested at Apple compatibility lab to ensure functionality with all current DDR3-based MacBook Pro, iMac, and Macbook
  • Compatible with MacBook Pro (13-inch, Late 2011), MacBook Pro (13-inch, Early 2011), MacBook Pro (15-inch, Late 2011),MacBook Pro (15-inch, Early 2011), MacBook Pro (17-inch, Late 2011), MacBook Pro (17-inch, Early 2011)
  • Memory Type: DDR3; Speed: 1333MHz

Specifications Overview

Model CMSA8GX3M2A1333C9
Type 204-pin DDR3 SODIMM
Speed DDR3-1333 MHz
Size 8GB (2 x 4GB)
CAS Latency 9
Timing 9-9-9-24
First Word Latency 13.5 ns
Voltage 1.5 V
Heat Spreader
ECC Support

RAM First Word Latency Table (nanoseconds)

Latency is measured in nanoseconds, which is a combination of frequency and CAS. Both frequency increases and latency decreases result in better system performance (when latency is the same, always prefer higher frequency if possible).

Frequency (MT/s)

1066 1333 1600 1866 2000 2133 2400 2666 2800 2933 3000 3100 3200
7 13.13 10.50 8.75 7.50 7.00 6.56 5.83 5.25 5.00 4.77 4.67 4.52 4.38
8 15.01 12.00 10.00 8.57 8.00 7.50 6.67 6.00 5.71 5.46 5.33 5.16 5.00
9 16.89 13.50 11.25 9.65 9.00 8.44 7.50 6.75 6.43 6.14 6.00 5.81 5.63
10 18.76 15.00 12.50 10.72 10.00 9.38 8.33 7.50 7.14 6.82 6.67 6.45 6.25
11 20.64 16.50 13.75 11.79 11.00 10.31 9.17 8.25 7.86 7.50 7.33 7.10 6.88
12 22.51 18.00 15.00 12.86 12.00 11.25 10.00 9.00 8.57 8.18 8.00 7.74 7.50
13 24.39 19.50 16.25 13.93 13.00 12.19 10.83 9.75 9.29 8.86 8.67 8.39 8.13
14 26.27 21.01 17.50 15.01 14.00 13.13 11.67 10.50 10.00 9.55 9.33 9.03 8.75
15 28.14 22.51 18.75 16.08 15.00 14.06 12.50 11.25 10.71 10.23 10.00 9.68 9.38
16 30.02 24.01 20.00 17.15 16.00 15.00 13.33 12.00 11.43 10.91 10.67 10.32 10.00
17 31.89 25.51 21.25 18.22 17.00 15.94 14.17 12.75 12.14 11.59 11.33 10.97 10.63
18 33.77 27.01 22.50 19.29 18.00 16.88 15.00 13.50 12.86 12.27 12.00 11.61 11.25
19 35.65 28.51 23.75 20.36 19.00 17.82 15.83 14.25 13.57 12.96 12.67 12.26 11.88
CAS (clock cycles) Lower latency means faster memory.

Cheapest alternatives with equal or better performance

-2.25ns Latency

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