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Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB)
Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB)

Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB)

Common Features

  • ✓ Both products have a memory speed (Tested Speed) of 5600 MHz.
  • ✓ Both products use DDR5 memory.
  • ✓ Both products have a CAS Latency (CL) of 46.
  • ✓ Both products have a tRAS timing of 45.
  • ✓ Both products have a tRCD timing of 46.
  • ✓ Both products have a tRP timing of 45.
  • ✓ Both products have a voltage of 1.1V.
  • ✓ Both products do not use Samsung B-Die.
  • ✓ Both products do not support ECC memory.
  • ✓ Both products do not have an integrated heatsink.
  • ✓ Both products do not have RGB lighting.
  • ✓ Both products support Intel XMP 3.0.
  • ✓ Both products have a memory size of 64GB per module.
  • ✓ Both products have a DDR5 memory version.
  • ✓ Both products have a 5600 MHz memory speed in SPD.
  • ✓ Both products have a 262-pin SO-DIMM form factor for product 1 and a 288-pin DIMM form factor for product 2.
  • ✓ Both products have a height of 30 mm for product 1 and 31.15 mm for product 2.
  • ✓ Both products are available in different memory sizes (total memory).

Main Differences

  • • True latency is 16.4 ns on Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) and 16.43 ns on Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB).
  • • Memory speed (SPD) is 5600 MHz on Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) and 4800 MHz on Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB).
  • • Form factor is 262-pin SO-DIMM on Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) and 288-pin DIMM on Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB).
  • • Total memory size is 2 x 64GB on Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) and 1 x 64GB on Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB).
  • • Height is 30 mm on Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) and 31.15 mm on Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB).
Specs Comparison
Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB)

Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB)

Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB)

Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB)

Performance:
true latency 16.4 ns 16.43 ns
memory speed (Tested Speed) 5600 5600
memory speed (SPD) 5600 MHz 4800 MHz
DDR memory version 5 5
CAS Latency (CL) 46 46
tRAS timing 45 45
tRCD timing 46 46
tRP timing 45 45

Both the Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) and the Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB) operate at a tested speed of 5600 MHz, but their SPD speeds differ. The CT2K64G56C46S5 has a memory speed of 5600 MHz, while the CT64G56C46U5 is lower at 4800 MHz.

The true latency for the CT2K64G56C46S5 is 16.4 ns, which is slightly better than the 16.43 ns true latency of the CT64G56C46U5. Both products have identical CAS latency of 46, tRAS timing of 45, tRCD timing of 46, and tRP timing of 45, showing no difference in these specific timing metrics.

Both modules use DDR5 memory, but the CT2K64G56C46S5 comes in a dual-module kit (2x64GB), while the CT64G56C46U5 is a single 64GB stick, with no further information available for the other product on that detail.

General info:
form factor 262-pin SO-DIMM 288-pin DIMM
memory size (total) 2 x 64GB 1 x 64GB
has Samsung B-Die ✕ ✕
voltage 1.1V 1.1V
height 30 mm 31.15 mm
release date February 2025 February 2025
memory size 64GB 64GB

The Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) and the Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB) differ in several key general specifications. The CT2K64G56C46S5 uses a 262-pin SO-DIMM form factor, while the CT64G56C46U5 uses a 288-pin DIMM form factor, making the latter module physically larger.

Both products offer 64GB of memory per module, but the CT2K64G56C46S5 comes as a kit of two 64GB modules (totaling 128GB), while the CT64G56C46U5 is a single 64GB module. Both have the same voltage rating of 1.1V and neither has Samsung B-Die memory.

The height of the modules also differs slightly: the CT2K64G56C46S5 measures 30 mm, while the CT64G56C46U5 is a bit taller at 31.15 mm.

Features:
Intel XMP / AMD EXPO Intel XMP 3.0 Intel XMP 3.0
Supports ECC memory ✕ ✕
Has an integrated heatsink ✕ ✕
has RGB lighting ✕ ✕

Both the Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) and the Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB) share identical features. Both products support Intel XMP 3.0, which allows for easy overclocking on compatible systems. Neither product supports ECC memory, and neither has an integrated heatsink or RGB lighting.

There are no differences in the feature set between the two modules in this category.

Comparison Summary

This is a specification comparison between Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) and Crucial CT64G56C46U5 DDR5-5600 64GB (1x64GB). Both products share a memory speed (Tested Speed) of 5600 MHz, CAS Latency (CL) of 46, and Intel XMP 3.0 support. However, they differ in several aspects: the memory speed (SPD) is 5600 MHz on product 1 and 4800 MHz on product 2, the form factor is 262-pin SO-DIMM on product 1 and 288-pin DIMM on product 2, and the height is 30 mm on product 1 and 31.15 mm on product 2. Additionally, product 1 has 2 x 64GB total memory size, while product 2 has 1 x 64GB.