[SOLVED] DDR4 Ram: 1333Mhz?

[shameek1997]

I recently bought a laptop with 8Gb(2x4Gb) ram DIMM. The store guy specified it will be a 2400Mhz.

https://i.imgur.com/gG7ec5m.png

Is it a DDR3 with 1333Mhz? Or is it because of 2 Ram modules. Where can I see whether its DDR4 or 3?

Thank you for your help.

 

[norcalsc]

what does the BOX say?

 

[R_1]

that is indeed DDR4. the ryzen chips with vega graphics are all DDR4 units. 1333 is the right speed for DDR4-2666. frequency of 1333 but sends and receives at the same time, Dual Data Rate Generation 4.

from Wikipedia
"DDR4 operates at a voltage between 1.2 V and 1.4 V with a frequency between 800 and 2133 MHz (DDR4-1600 through DDR4-4266)"

 

[coops1]

Task manager is probably reporting the actual speed - DDR allows two transfers per cycle for an effective throughput of 2666mhz, so I'd say it's ddr4 2666mhz.

What are the rest of the specs of your laptop? You could always download cpu-z to get detailed info on everything.

Edit: Beaten to it!

 

[shameek1997]

Task manager is probably reporting the actual speed - DDR allows two transfers per cycle for an effective throughput of 2666mhz, so I'd say it's ddr4 2666mhz.

What are the rest of the specs of your laptop? You could always download cpu-z to get detailed info on everything.

Edit: Beaten to it!

Thank you for your reply. Its showing DDR4, but I still did not understand the concept of actual and effective speed. Please explain.. Sorry I am a noob.

https://i.imgur.com/ATGBiII.png

 

[coops1]

The 'DDR' in DDR4 stands for double data rate which means that for each clock cycle, the ram can make two transfers. So when you see ddr4 at 1,333 mhz, it is actually making 2,666 million transfers per second (2,666MT/s) - people tend to use this figure when talking about ram, because higher numbers sound better I guess.

Your CPU z screenshot shows 1,197mhz, which is ddr4 2400 (the slight difference is likely because your system's base clock isn't quite exactly 100mhz).