KHX1600C9D3K2/8GX vs. KHX1600C9D3P1K2/8G

[Thoriumninezero]

https://www.kingston.com/datasheets/khx1600c9d3k2_8gx.pdf
vs.
https://www.kingston.com/datasheets/KHX1600C9D3P1K2_8G.pdf

What is the difference in mainly how the volts are working?
I know that the "x" and "g" at the end mean something to do with the auto or manual overclock-ability. These both state they are 1.5 volt chips.
• JEDEC standard 1.5V (1.425V ~ 1.575V) Power Supply
• VDDQ = 1.5V (1.425V ~ 1.575V)
However, the blue's (C9D3K2's) are marked as 1.65 volt and in the description it states, "Each module kit has been tested to run at DDR3-1600 at a low latency timing of 9-9-9-27 at 1.65V." The silvers/grays (C9D3P1K2's) are marked 1.5 volts and the description states, "Each module kit has been tested to run at JEDEC DDR3-1600 at a low latency timing of 9-9-9 at 1.5V."

 

[Vic 40]

The grey should be abit better since being able to run at a lower voltage.Means often that the chips used are better since not requiring that much voltage to run stable.
If you are trying to choose between these get the grey.

 

[Thoriumninezero]

Why would they both state 1.5 volts then when the blue's run at 1.65? They're both standard at 1.5. The only place it states any difference is deep in the description. Is it just the company trying to hide the 1.65 volts?

 

[Vic 40]

The blue will run at 1.5V but at higher latencies/timings,

At 1.5V

JEDEC standard latency DDR3-1600 timing of 11-11-1

at 1.65V ],

a low latency timing of 9-9-9-27

The grey will run the latter at 1.5V,

DDR3-1600 at a low latency timing of 9-9-9 at 1.5

why they are the better.