This model features a 5600MHz and 4800MHz RAM option.
This model features a 5600MHz and 4800MHz RAM option.
you have a solid 7945hx laptop and are planning to boost it for 3d tasks. you're considering upgrading to 64gb ram, aiming for higher performance. latency matters, as does speed. the links you shared point to two options: one with 4800mhz c40 and another with 5600mhz c46. which one suits your needs better depends on balancing those factors.
You can purchase the CL40 model for the identical cost as the CL46 G.SKILL Ripjaws SO-DIMM 64GB (2 x 32GB) 262-Pin DDR5 SO-DIMM DDR5 5600 (PC5 44800) from F5-5600S4040A32GX2 on Newegg.com.
Latency is expressed in clock cycles, which means the 5600 CL46 kit performs better in this metric (around 0.2ns, essentially negligible). If possible, obtain that kit. Many laptops lack XMP support, so using a JEDEC standard is likely the safest choice.
Are you confident? I thought it was meant for maximum speed, but since my CPU supports it, I should check.