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Compare Crucial 4GB Single DDR4 2666 CT4G4DFS8266 vs Pro Overclocking 32GB (2x16GB) DDR5 6400MHz

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  3. Crucial 4GB Single DDR4 2666 CT4G4DFS8266 🆚 Crucial Pro Overclocking 32GB (2x16GB) DDR5 6400MHz
The main differences between Crucial 4GB Single DDR4 2666 CT4G4DFS8266 and Crucial Pro Overclocking 32GB (2x16GB) DDR5 6400MHz are in Speed, Size, CAS Latency and First Word Latency.
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Crucial 4GB Single DDR4 2666 MT/s (PC4-21300) CL19 x8 UDIMM 288-Pin - CT4G4DFS8266
Crucial 4GB Single DDR4 2666 CT4G4DFS8266
Crucial Pro Overclocking 32GB (2x16GB) DDR5 6400MHz CL32 Black CP2K16G64C32U5B
Crucial Pro Overclocking 32GB (2x16GB) DDR5 6400MHz
Prices
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Out of Stock
+ $3.99 Shipping
$15.99
Out of Stock
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$20.99
Out of Stock
Free shipping
$23.99
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Prices
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Out of Stock
Free shipping
$389.99
Out of Stock
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$389.99
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$399.99
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* Product prices and availability are subject to change frequently. Any price and availability information displayed on Amazon at the time of purchase will apply.
Brand
Crucial
Brand
Crucial
Model
CT4G4DFS8266
Model
CP2K16G64C32U5B
Release Date
-
Release Date
📅 October 2025
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews
★★★★☆
(50 reviews)
User reviews
★★★★☆
(72 reviews)
Price history
View Details ►
Price history
View Details ►
Price/GB
$4.00
Price/GB
$12.19
GB/$1
0.25
GB/$1
0.08
Samsung B-Die
No
Samsung B-Die
No
Compatible PC parts
Motherboards ►
Compatible PC parts
Motherboards ►
Type
288-pin DDR4 DIMM
Type
288-pin DDR5 DIMM
Speed
DDR4-2666 MHz
Speed
DDR5-6400 MHz
Size
4GB (1 x 4GB)
Size
32GB (2 x 16GB)
CAS Latency
19
CAS Latency
32
Timing
-
Timing
32-40-40-103
First Word Latency
14.25 ns
First Word Latency
10 ns
Voltage
1.2 V
Voltage
1.35 V
Heat Spreader
No
Heat Spreader
Yes
ECC Support
No
ECC Support
No
Color
-
Color
Black

Comparison and key differences summary

Reasons to buy the Crucial 4GB Single DDR4 2666 CT4G4DFS8266:

  • 96% cheaper, you can save $374.00
  • Less voltage required (-0.15 V needed)
  • Less CAS latency (-13)

Buy now

Reasons to buy the Crucial Pro Overclocking 32GB (2x16GB) DDR5 6400MHz:

  • Better first word latency (-4.25 ns)
  • More Capacity (+28 GB available)

Buy now

Have you found incorrect information on this page? Contact us and we will fix it as soon as possible.

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