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Crucial
Crucial CT2K32G4DFD8266 64GB (2x32GB) DDR4 2666 CL19 desktop RAM
A 64 GB dual-channel DDR4 kit running at 2666 MT/s with CL19 latency and 1.20 V operation
- Capacity64GB (2 x 32GB)
- Type288-Pin PC RAM
- SpeedDDR4 2666 (PC4 21300)
- CAS LatencyCL19
- Voltage1.20V
- ECCNo
- 64GB dual-channel kit doubles capacity for demanding workloads
- DDR4 2666 speed delivers 21300 MT/s bandwidth for responsive performance
- CL19 latency keeps data access quick and efficient
- 20V operation cuts power draw by up to 40%
- Unbuffered 288-pin DIMMs install straight into standard desktop slots
64GB Dual-Channel DDR4 Kit
This 64GB kit contains two 32GB DDR4 DIMMs rated at 2666 MT/s with CL19 latency. The unbuffered, non-ECC modules run at 1.20V and fit standard 288-pin desktop slots. It suits builders who need high capacity for memory-intensive workloads on platforms that support DDR4.
No Heat Spreader Included
The green modules ship without a heat spreader, so they occupy minimal vertical space inside the case. Buyers who prefer active cooling can add aftermarket spreaders or rely on chassis airflow. This design also keeps the kit compatible with large CPU coolers that overhang the first memory slot.
DDR4 2666 Standard Limits
The JEDEC DDR4 2666 specification caps the data rate at 2666 MT/s and defines PC4-21300 bandwidth. Speeds up to 3200 MT/s are noted as future expectations for the technology, not a guarantee for this kit. Systems that only support lower DDR4 speeds will downclock the modules automatically. Builders needing ECC or registered memory must choose a different product.
Highlights
- 64GB dual-channel kit doubles capacity for demanding workloads
- DDR4 2666 speed delivers 21300 MT/s bandwidth for responsive performance
- CL19 latency keeps data access quick and efficient
- 20V operation cuts power draw by up to 40%
- Unbuffered 288-pin DIMMs install straight into standard desktop slots
Specifications
| Brand | Crucial |
|---|---|
| Model | CT2K32G4DFD8266 |
| Capacity | 64GB (2 x 32GB) |
| Type | 288-Pin PC RAM |
| Speed | DDR4 2666 (PC4 21300) |
| CAS Latency | CL19 |
| Voltage | 1.20V |
| ECC | No |
| Buffered/Registered | Unbuffered |
| Multi-channel Kit | Dual Channel Kit |
| Color | Green |
| Heat Spreader | No |
| Features | Speeds up to 3200 MT/s and faster data rates are expected to be available as DDR4 technology matures Increase bandwidth by up to 32% Reduce power consumption by up to 40% Faster bursts access speeds for improved sequential data throughout Optimized for next generation processors and platforms |
| Shipping weight | 0.07 kg |
| Package size | 175 × 89 × 6 mm |
Questions about this item
Will the dual-channel kit need any firmware updates or component replacements over its lifetime?
The unbuffered DDR4 modules have no heat spreader and no moving parts, so no firmware updates or component replacements are expected.
What limit appears first when the 64 GB kit runs at 2666 MT/s continuously?
The CAS latency of CL19 sets the timing boundary before bandwidth or voltage limits are reached.
How much heat and power will the 1.20 V modules produce during all-day operation?
Operating at 1.20 V, the kit reduces power consumption by up to 40 % compared with earlier DDR4 designs, keeping heat output low.
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