IBM 8GB (2 x 4GB) DDR2 ECC Registered DDR2 667 RAM

IBM 8GB (2 x 4GB) 240-Pin DDR2 ECC Registered DDR2 667 (PC2 5300) System Specific 41Y2768

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IBM 8GB (2 x 4GB) 240-Pin DDR2 SDRAM ECC Registered DDR2 667 (PC2 5300) System Specific Memory Model 41Y2768 Compatible System: Compatible With: IBM System x3455 IBM System x3455 7940 IBM System x3455 7941 IBM System x3455 7984 IBM System x3455 7986 IBM System x3610 IBM System x3610 7942 IBM System x3655 IBM System x3655 7943 IBM System x3655 7985 IBM System x3755 IBM System x3755 7163 IBM System x3755 8877 IBM System x3850 M2 IBM System x3850 M2 7141 IBM System x3850 M2 7233 IBM System x3950 M2 IBM System x3950 M2 7141 IBM System x3950 M2 7233 Parts: 1 year limited Labor: 1 year limited

IBM 8GB (2 x 4GB) DDR2 ECC Registered DDR2 667 image 1

IBM 8GB (2 x 4GB) DDR2 ECC Registered DDR2 667 image 2

Specifications Overview

Model	41Y2768
Type	240-pin DDR2 DIMM
Speed	DDR2-667 MHz
Size	8GB (2 x 4GB)
CAS Latency	5
First Word Latency	14.99 ns
Voltage	1.8 V
Heat Spreader	No
ECC Support	Yes

	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)

	667	800
5	14.99	12.50
6	17.99	15.00

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.