Question about Ram at default voltage vs 2.7v

[Compddd]

What is the standard default voltage RAM usually runs at if I set my ram v to default in bios, is it 2.6v? Also if Im running my RAM at 2.7v will it generate noticeably more heat then if I was running it at default voltage?

 

[vetteguy]

It might depend on the board, but if you use a program like CPU-Z it should tell you what voltage you're running at.

 

[BW86]

Im pretty sure its 2.6 , well it is on my motherboard. It will generate more heat but you wont notice

 

[Matthias99]

Originally posted by: BW86
Im pretty sure its 2.6 , well it is on my motherboard. It will generate more heat but you wont notice

2.6V is the normal voltage for DDRRAM (at least up to DDR400; there aren't official specs past there). However, quite a few modules nowadays are rated for 2.9V or higher operation.

Power consumption (and heat output) of CMOS circuits tends to increase as the square of the input voltage. However, 2.7^2 / 2.6^2 = 7.29 / 6.76 = 1.08, or a ~8% increase in power output. This is likely only a couple of watts at the power levels we're talking about for your RAM chips, and so would not even be noticeable in most systems.

 

[Navid]

Originally posted by: Matthias99
Power consumption (and heat output) of CMOS circuits tends to increase as the square of the input voltage. However, 2.7^2 / 2.6^2 = 7.29 / 6.76 = 1.08, or a ~8% increase in power output. This is likely only a couple of watts at the power levels we're talking about for your RAM chips, and so would not even be noticeable in most systems.

This is a good estimate for power consumption.
It ignores the power consumption due to short circuit current that flows in every CMOS circuit during each transition. The short circuit current is negligible if the circuit operates lower than the maximum operating frequency.
However, if the circuit operates close to maximum operating frequency, the short circuit current is not negligible anymore and the relationship between the power and the supply voltage follows a cube as opposed to a square relationship.
Nevertheless, the power increase still remains small (12%).

 

[caz67]

2.6 is "standard" default..