Question Why is the ram voltage in the store is different then the one in the QVL list?

[cards1]

in the website im going to buy it from it says 1.2 on the product name, while in the QVL its 1.35, the ram name is "32GB (2x16GB) DDR4 3600Mhz - CL16 - 1.2V - Trident Z RGB Series - RGB LED - Bdie" both are F4-3600C16D-32GTZR.

 

[rgd1101]

https://www.gskill.com/specification/165/166/1562839659/F4-3600C16D-32GTZR-Specification
1.2 is on default speed. 1.35 on xmp profile

 

[cards1]

https://www.gskill.com/specification/165/166/1562839659/F4-3600C16D-32GTZR-Specification
1.2 is on default speed. 1.35 on xmp profile

thanks, does it means its only 3200 on default while it says 3600? im not an overclocker.

 

[rgd1101]

default is 2133MHz
there might be multiple xmp profile

 

[cards1]

default is 2133MHz
there might be multiple xmp profile

so 3600 ram kits that have 1.2v have default speeds of 2133, & 3600 ram kits with 1.35v have a default speed of 3600?

 

[rgd1101]

based ram speed is 2133 at 1.2v.
you can/have to use xmp to get to 3600 with 1.35v

there is no such ram based at 3600. there are some at 2666.

 

[cards1]

based ram speed is 2133 at 1.2v.
you can/have to use xmp to get to 3600 with 1.35v

there is no such ram based at 3600. there are some at 2666.

thanks but this is so confusing to me, just tell me one thing, the optimal ram kit for 3900x is 3600mhz, if i'll take the kit that i mentioned, will it be the optimal one? or i need to look for 1.35v? or for something else? i just want the optimal one for 3900x without overclocking.