KINGSTON 8GB DDR4 4000MHz KF440C19RBA/8

Each module kit supports Intel Extreme Memory Profiles (Intel XMP) 2.0.

Dimensions: 133 x 42 x 8 mm 
VPP = 2.5V Typical
VDDSPD = 2.2V to 3.6V
On-Die termination (ODT)
16 internal banks; 4 groups of 4 banks each
Bi-Directional Differential Data Strobe
8 bit pre-fetch
DDR4 SDRAM (Synchronous DRAM)
Eight 1G x 8-bit FBGA components per module
JEDEC standard latency DDR4-2400 timing of 17-17-17 at 1.2V
Contact: Gold contact fingers
Default (JEDEC): DDR4-2400 CL17-17-17 @1.2V
XMP Profile #1: DDR4-4000 CL19-23-23 @1.35V
XMP Profile #2: DDR4-3600 CL17-21-21 @1.35V
Row Cycle Time (tRCmin): 45.75ns(min.)
Refresh to Active/Refresh
Command Time (tRFCmin): 350ns(min.)
Row Active Time (tRASmin): 32ns (min.)
UL Rating: 94 V - 0
Storage Temperature: -55°C to +100°C