Stefan Bruens wrote:
On Friday 28 August 2015 11:24:03 Per Jessen wrote:
Ondřej Súkup wrote:
My 2 mythtv backend boxes are still running on Intel P4s. Very much alive and no moral nor physical reason to replace them. Ditto for our corporate firewalls and asterisk server.
try to calculate energy needs of intel P4 vs modern 64bit cpu with sufficent power for this backends ..
[off-topic] One of these backends use about 70W when idling, which is maybe 20 out of 24 hours. It amounts to 0.25 per day in running costs. A new up-to-date box (with room for two 3.5" SATA drives) might be 300 and still consume maybe 35W. (very rough guess based on power dissipation of newer Intel CPUs). That makes a saving of 0.12 per day, thereby paying off the 300 investment in 2500 days. If I got a 2nd hand machine at 150, the investment would be paid off in 1250 days, unless the 2nd hand box used more power.
I have not taken into account that kWhs are cheaper between 20:00 and 08:00. Maybe I'll put a meter on it for a full day and see the real numbers.
Something powered by Intel Atoms would use significantly less power, but I haven't looked for those and I have a suspicion they wouldn't have sufficient power.
70W minimum times 24 hours times 365 days times 0.23€ is 140€ a year.
An Intel Braswell Atom N3700 runs with about 7W, or 15€ a year. It sells for 100€ (uATX or ITX form factor), plus 30€ for 4GB of RAM, so it takes a little bit longer than a year to pay off (you can reuse your old case/PSU).
The N3700 has at least the same, often 4 times the speed of the P4, see e.g. http://www.phoronix.com/scan.php?page=article&item=intel-478-retro&num=5
Nice one, thank you. Not sure if it would fit in the old box (IBM Thinkcentre), :-) see: https://www.itsco.de/pc-ibm-thinkcentre-m52-intel-pentium-4-3ghz-8215.html Anyway, I'm probably not going to switch these two boxes for the sake of saving myself 100 a year. It was primarily a response to Ondřej Súkup who thought the energy consumption of "intel P4 vs modern 64bit cpu" was an argument in the lets-drop-32bit discussion.
The Intel Compute Stick (Z3735F) has 4 cores, but only 1.8GHz, the N2820 has 2 cores but 2.4GHz. The N3700 has 4 cores with 2.4GHz, so is always faster than any of the two other. http://ark.intel.com/compare/80274,79052,78867,87261
I've got an Intel Compute Stick, I'm trying to make it run as mythtv client. I need to look at the network, it doesn't work with openSUSE 13.2. -- Per Jessen, Zürich (27.4°C) http://www.hostsuisse.com/ - dedicated server rental in Switzerland. -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-factory+owner@opensuse.org