4 ms·
Do you have any proof of that? "Free" memory uses as much energy as "used" memory, there is no distinction in SD|DDR-RAM. And if the OS is smart, it only has to
by hansbogert 13y ago
Do you have any proof of that? "Free" memory uses as much energy as "used" memory, there is no distinction in SD|DDR-RAM. And if the OS is smart, it only has to keep a simple index of memory pages still relevant. I'd argue that this has a measurable battery-hit.
- jeltz 13y agoReading from the SSD to laod it into RAM does drain battery. No idea if it is enough to matter though.
- runako 13y agoYou're only accounting for the RAM power. Accessing the SSD costs power, too.
- tedunangst 13y agoThen I think I'd rather Windows prefetched my programs while I'm plugged in so it doesn't have to do so when I'm on battery.
- tanzam75 13y ago> You're only accounting for the RAM power. Accessing the SSD costs power, too. A typical modern SSD reads at 500 MiB/s, consumes 3 watts when reading, and 0.3 watts when idle. A stick of DDR3 RAM consumes about 3 watts, just sitting idle. The power consumption from prefetching is minor compared to that of the RAM.