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RAM Speed according to Memtest86+

Here are some speed results for RAM according to Memtest86+ on some machines that I have run. Note that the reported speed varies between runs by a few percent.

Thinkpad 600e PentiumII 400Mhz PC-66 RAM (2 DIMMs) 174MB/s
Compaq P3-866MHz PC133 RAM (3 DIMMs, 2*128 + 256) 190MB/s
Compaq Athlon 1GHz PC133 RAM (3 DIMMs) 219MB/s
Compaq P3-800MHz PC133 RAM (1 DIMM) 270MB/s
Compaq P3-800MHz PC133 RAM (3 DIMMs, 2*128 + 256) 240MB/s
Compaq P4 1.5GHz PC133 RAM (3 DIMMs) 486MB/s
Compaq P4 1.5GHz PC133 RAM (1 or 2 DIMMs) 490MB/s
EeePC 701, DDR2-665 PC2-5300 running at DDR2-333 speed 798MB/s
HP Celeron 1.8GHz PC2100/DDR266 (1 DIMM) 824MB/s
HP Celeron 2.4GHz PC2100/DDR266 RAM (2 DIMMs) 984MB/s
Celeron D (32bit) 2.93GHz PC2400/DDR300 PC3200 RAM 1,140MB/s
HP Celeron 2.4GHz PC2700/DDR333 RAM (2 DIMMs) 1,027MB/s
HP Celeron 2.4GHz PC2700/DDR333 RAM (2 DIMMs) 1,375MB/s
Dell PowerEdge T105 Dual-core Opteron 1212 (2GHz) single DDR2-667 ECC RAM 1,670MB/s
Dell PowerEdge T105 Dual-core Opteron 1212 (2GHz) pair of DDR2-667 ECC RAM 1,826MB/s
NEC Pentium E2160 1.8GHz DDR663 (two mismatched DIMMs) 2,307MB/s
IBM Pentium E2160 1.8GHz DDR2-667 PC2-5300 (single DIMM) 2,371MB/s
IBM Pentium E2160 1.8GHz PC2-4200 (paired DIMMs) 2,436MB/s
NEC Pentium E4600 2.4GHz DDR2-667 PC2-5300 (single DIMM) 2,528MB/s
NEC Pentium D 2.8GHz DDR 533 (unpaired DIMMS) 1,600MB/s
NEC Pentium D 2.8GHz DDR 533 (paired DIMMS) 2,600MB/s
Thinkpad T61 DDR2-665 PC2-5300 (single DIMM) 2,023MB/s
Thinkpad T61 DDR2-665 PC2-5300 (paired or mismatched DIMMs) 2,823MB/s
Core Gen2 2492MHz 3,804MB/s
Core Gen2 2492MHz 2 DIMMs 3,930MB/s
Q8400 2*PC6400 4,830MB/s
Dell PowerEdge T110 Core i3-3220 3GHz, DDR3-1600 PC3-12800 (paired DIMMs) 17.9GB/s

The Wikipedia page on SDRAM lists the theoretical speeds and the various names of the different types of DDR RAM (each type seems to have at least two names).

DDR266 theoretically can do 2100MB/s, but I’ve only seen it do 984MB/s (with two DIMMs).

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