Hi,
Miod Vallat wrote:
I can't tell for the exact machines Theo is using, but here are a few
values from my bunker:
- VAX 4000/106 (fast vax, 100MHz processor), quite similar to the one
Theo is using, two SCSI disks: about 95W.
- Alpha LX164 (2nd generation alpha, 533MHz processor), with a modern (2
years old) ATX power supply, only one disk: about 85W.
- SGI Fuel (700MHz R16000), original power supply: about 200W.
- 1.4GHz G4 Mac mini: 40W.
- SPARCstation 20, 150MHz RT625 processor, one disk: about 115W.
- Sun Blade 100 (500MHz UltraSPARC-IIe): about 65W.
- HP Visualize B2000 (400MHz PA-RISC): about 130W.
- Lemote Fuloong 2F (800MHz): about 20W.
- Plextor PX-EH160L (landisk): about 15W.
For some of machines I also have, the numbers are similar. I was running
quite some archs at my home to test stuff!
A Dual-processor SGI Octane was around 175W, lower-end video-card.
I was able to optimize power on several machines by changing/swapping
out video cards. Especially if used only for testing or running
headless, you don't need them Sometimes you save quite a lot of power.
Sometimes you can even remove the video-card.
The second very important step are Hard-disks. Old SCSI hard disks run
hot and consume a lot! Just using newer ones (perhaps with the
Wide-Narrow adapter like in the case of old SPARCStations) help
stressing the system les and often improves even the performance.
I am very tempted to attach IDE hdd's with a SCSI adapter in some old
machines, however I don't know how reliable those SCSI-IDE converters
are.. I might not want to end having problems with them, posts on the
web vary really a lot.
Riccardo
