We've seen some customers order 2 x 120 volt, 30 amp power circuits which is about 5.8kW, and it's not uncommon. With the new blade server people coming in we see 208 volt, 30 amp circuits being ordered and those are approx 5kW each and it's not uncommon to have people order multiple circuits since you can usually fit 3+ blade chassis in a single 42U rack. We typically recommend to our customers that they keep their total power consumption under 6kW to avoid their rack overheating, but if the rack is completely full and you run hot isle / cold isle like we do it is possible to exceed 6kW of power consumption in one rack and not have overheating issues with the equipment.
We typically run our network stuff on DC power, and we have lots lower power density there. The biggest problem we see with network stuff is that so much of the devices run sideways air flow (not "in the front, out the back", so we have to do funny air baffle setups to keep the hot air from blowing into the intake of the next rack in the row. -Bill > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:cisco-nsp- > [EMAIL PROTECTED] On Behalf Of Tim Durack > Sent: Saturday, March 22, 2008 10:28 PM > To: Patrick Giagnocavo; cisco-nsp > Subject: Re: [c-nsp] rack power question > > For a 6509-V-E with 2xVS-S720-10G-3CXLs and 7xWS-X6708-10G-3CXL.Cisco > Power Calculator shows: > > 107.76 Amps 4525.92 Watts 18183.55 BTU/Hr > > At 21u you could squeeze two in a rack, for 9K (we aren't planning on > doing that though.) > > On the server side something like an HP C Class Blade Chassis with 16 > blades can hit 3K when the fans rev up. > At 10u you could squeeze 4 in a rack, but cooling is going to be an > issue. With enclosed ducted racks, we currently have plans to put 3 in > a rack for a total of 9K. > > So yes we could require >6K. > > Tim:> > > On Sat, Mar 22, 2008 at 10:02 PM, Patrick Giagnocavo > <[EMAIL PROTECTED]> > wrote: > > > > Hopefully this classifies as on-topic... > > > > I am discussing with some investors the possible setup of new > datacenter > > space. > > > > Obviously we want to be able to fill a rack, and in order to do so, > > we need to provide enough power to each rack. > > > > Right now we are in spreadsheet mode evaluating different scenarios. > > > > Are there cases where more than 6000W per rack would be needed? > > > > (We are not worried about cooling due to the special circumstances > > of the space.) > > > > Would someone pay extra for > 7KW in a rack? What would be the > > maximum you could ever see yourself needing in order to power all 42U ? > > > > Cordially > > > > Patrick Giagnocavo > > [EMAIL PROTECTED] > > > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/