Corsair Mac Memory 32GB (4 x 8GB) DDR3L SODIMM 1866MHz RAM

Corsair Mac Memory 32GB (4 x 8GB) DDR3L SODIMM 1866MHz C11 Memory Kit CMSA32GX3M4C1866C11

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Adding system memory is one of the most effective ways to improve overall performance and Corsair’s Mac Memory offers a solid tested solution with a limited lifetime warranty.

Corsair Mac Memory 32GB (4 x 8GB) DDR3L SODIMM 1866MHz image 1

Specifications Overview

Model	CMSA32GX3M4C1866C11
Type	204-pin DDR3 SODIMM
Speed	DDR3-1866 MHz
Size	32GB (4 x 8GB)
CAS Latency	11
Timing	11-11-11-32
First Word Latency	11.79 ns
Voltage	1.35 V
Heat Spreader	No
ECC Support	No

	Old Name	Current Name	Branding	Data Speed	Port
USB 2.0	USB 2.0	USB 2.0	Hi-Speed USB	480 Mbit/s	diverse
USB 3.0	USB 3.1 Gen 1	USB 3.2 Gen 1x1	SuperSpeed USB	5 Gbit/s	diverse
USB 3.1	USB 3.1 Gen 2	USB 3.2 Gen 2x1	SuperSpeed USB 10Gbps	10 Gbit/s	diverse
USB 3.2	USB 3.2 Gen 2x2	USB 4.0 Gen 2x2	USB4 20Gbps	20 Gbit/s	only USB-C
USB4	USB 4.0 Gen 3x2	USB4 1.0	USB4 40Gbps	40 Gbit/s	only USB-C
USB4v2	USB 4.0 Gen 4	USB4 2.0	USB4 80Gbps	80-120 Gbit/s	only USB-C

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.

Distribution of First Word Latencies for Similar RAM Modules

The histogram below shows the distribution of first word latencies (in nanoseconds) for all RAM modules of the same DDR type and frequency in our database. Each bar represents the number of modules that fall within a specific latency range. The highlighted bar indicates the latency of the currently selected RAM module.