ddr5 laptop ram 5600vs4800?

[orze]

so i got a decent laptop with a 7945hx

i want to upgrade to 64gb of ram cus i do 3d work and i more or less get to the 16gb i got right now all the time

 

found this 2.

1 is 4800mhz c40

2 is 5600mhz c46

i know latency is important. i also know that speed is important.

whats better for that cpu?

 

here are the links

https://www.amazon.com/gp/product/B0BLTG7TN6/ref=ox_sc_act_title_3?smid=A2NDNAPHQ3UDKH&th=1

 

https://www.amazon.com/gp/product/B09S2QLBWC/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&th=1

[filpo]

14 minutes ago, orze said:

so i got a decent laptop with a 7945hx

i want to upgrade to 64gb of ram cus i do 3d work and i more or less get to the 16gb i got right now all the time

 

found this 2.

1 is 4800mhz c40

2 is 5600mhz c46

i know latency is important. i also know that speed is important.

whats better for that cpu?

 

here are the links

https://www.amazon.com/gp/product/B0BLTG7TN6/ref=ox_sc_act_title_3?smid=A2NDNAPHQ3UDKH&th=1

 

https://www.amazon.com/gp/product/B09S2QLBWC/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&th=1

you can get 5600 CL40 for the same price as that CL46

G.SKILL Ripjaws SO-DIMM 64GB (2 x 32GB) 262-Pin DDR5 SO-DIMM DDR5 5600 (PC5 44800) Laptop Memory Model F5-5600S4040A32GX2-RS - Newegg.com

[RONOTHAN##]

1 hour ago, orze said:

i know latency is important. i also know that speed is important.

whats better for that cpu?

Latency is measured in clock cycles, so counterintuitively the 5600 CL46 kit is actually better for latency (in the range of 0.2ns, so effectively nothing). Get that kit if you can. 

 

56 minutes ago, filpo said:

you can get 5600 CL40 for the same price as that CL46

G.SKILL Ripjaws SO-DIMM 64GB (2 x 32GB) 262-Pin DDR5 SO-DIMM DDR5 5600 (PC5 44800) Laptop Memory Model F5-5600S4040A32GX2-RS - Newegg.com

Most laptops don't support XMP, so sticking to a JEDEC bin is probably for the best. 

[filpo]

5 minutes ago, RONOTHAN## said:

Most laptops don't support XMP, so sticking to a JEDEC bin is probably for the best.

It’s worth a try if it’s the same price. And they don’t have to use xmp

[RONOTHAN##]

8 minutes ago, filpo said:

It’s worth a try if it’s the same price. And they don’t have to use xmp

The problem is usually if a kit has a 5600 XMP, it'll run at 4800 JEDEC, so you will be getting a slower kit overall, and there will be no settings in the BIOS to try and change that. 

[orze]

On 4/8/2024 at 2:24 PM, RONOTHAN## said:

The problem is usually if a kit has a 5600 XMP, it'll run at 4800 JEDEC, so you will be getting a slower kit overall, and there will be no settings in the BIOS to try and change that. 

are u sure? cus i read its supposed to use the max speed. cus i got a cpu that can use it

[orze]

On 4/8/2024 at 2:08 PM, filpo said:

you can get 5600 CL40 for the same price as that CL46

G.SKILL Ripjaws SO-DIMM 64GB (2 x 32GB) 262-Pin DDR5 SO-DIMM DDR5 5600 (PC5 44800) Laptop Memory Model F5-5600S4040A32GX2-RS - Newegg.com

i saw that 2Rx8 is the best and i cant fine what that is xD u got a clue?