Actual power consumption on WS-C6509-E

Hello everyone,
I have a WS-C6509-E with two WS-CAC-6000W power supplies. I have to determine what is the real power consumption of the whole device but I noticed that there is a mismatch between measurements and show power output so I would very much appreciate if someone could explain why is that so.
I did the following test to try figure out the consumption from the power grid.
Step 1. When both supplies are active, show power gives me the following output:
C6509Test#show power
system power redundancy mode = redundant
system power total =     5771.64 Watts (137.42 Amps @ 42V)
system power used =      2253.72 Watts (53.66 Amps @ 42V)
system power available = 3517.92 Watts (83.76 Amps @ 42V)
                        Power-Capacity PS-Fan Output Oper
PS   Type               Watts   A @42V Status Status State
1    WS-CAC-6000W       5771.64 137.42 OK     OK     on
2    WS-CAC-6000W       5771.64 137.42 OK     OK     on
                        Pwr-Allocated Oper
Fan Type               Watts   A @42V State
1    WS-C6509-E-FAN      150.36 3.58 OK
                        Pwr-Requested Pwr-Allocated Admin Oper
Slot Card-Type          Watts   A @42V Watts   A @42V State State
1    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
2    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
3    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
4    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
5    VS-S720-10G         338.10 8.05   338.10 8.05 on    on
6    VS-S720-10G         338.10 8.05   338.10 8.05 on    on
7    WS-X6724-SFP        125.16 2.98   125.16 2.98 on    on
system auxiliary power mode = off
system auxiliary power redundancy operationally = non-redundant
system primary connector power limit =   10920.00 Watts (260.00 Amps @ 42V)
system auxiliary connector power limit = 10500.00 Watts (250.00 Amps @ 42V)
system primary power used =              2253.72 Watts (53.66 Amps @ 42V)
system auxiliary power used =            0 Watt
Step 2. Then I switched off power supply 1:
C6509Test#
*Jan 22 09:29:21.753: %C6KPWR-SP-4-PSOUTPUTDROP: Power supply 1 output has dropp
ed
*Jan 22 09:29:21.769: %C6KPWR-SP-2-PSFAIL: power supply 1 output failed.
*Jan 22 09:29:21.769: %C6KPWR-SP-4-PSREDUNDANTONESUPPLY: in power-redundancy mod
e, system is operating on one power supply.
C6509Test#
C6509Test#show power
system power redundancy mode = redundant
system power redundancy operationally = non-redundant
system power total =     5771.64 Watts (137.42 Amps @ 42V)
system power used =      2253.72 Watts (53.66 Amps @ 42V)
system power available = 3517.92 Watts (83.76 Amps @ 42V)
                        Power-Capacity PS-Fan Output Oper
PS   Type               Watts   A @42V Status Status State
1    WS-CAC-6000W       3780.00 90.00 -      -      off
2    WS-CAC-6000W       5771.64 137.42 OK     OK     on
                        Pwr-Allocated Oper
Fan Type               Watts   A @42V State
1    WS-C6509-E-FAN      150.36 3.58 OK
                        Pwr-Requested Pwr-Allocated Admin Oper
Slot Card-Type          Watts   A @42V Watts   A @42V State State
1    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
2    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
3    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
4    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
5    VS-S720-10G         338.10 8.05   338.10 8.05 on    on
6    VS-S720-10G         338.10 8.05   338.10 8.05 on    on
7    WS-X6724-SFP        125.16 2.98   125.16 2.98 on    on
system auxiliary power mode = off
system auxiliary power redundancy operationally = non-redundant
system primary connector power limit =   10920.00 Watts (260.00 Amps @ 42V)
system auxiliary connector power limit = 10500.00 Watts (250.00 Amps @ 42V)
system primary power used =              2253.72 Watts (53.66 Amps @ 42V)
system auxiliary power used =            0 Watt
Step 3. Now I disconnect the power input 1 on running power supply 2 thus leaving the device working on only one out of four power inputs:
C6509Test#
*Jan 22 09:35:50.297: %C6KPWR-SP-4-INPUTCHANGE: Power supply 2 input has changed
. Power capacity adjusted to 2671.20W
*Jan 22 09:35:50.297: %C6KPWR-SP-4-PSOUTPUTDROP: Power supply 2 output has dropp
ed
C6509Test#show power
system power redundancy mode = redundant
system power redundancy operationally = non-redundant
system power total =     2671.20 Watts (63.60 Amps @ 42V)
system power used =      2253.72 Watts (53.66 Amps @ 42V)
system power available = 417.48 Watts ( 9.94 Amps @ 42V)
                        Power-Capacity PS-Fan Output Oper
PS   Type               Watts   A @42V Status Status State
1    WS-CAC-6000W       3780.00 90.00 -      -      off
2    WS-CAC-6000W       2671.20 63.60 OK     OK     on
                        Pwr-Allocated Oper
Fan Type               Watts   A @42V State
1    WS-C6509-E-FAN      150.36 3.58 OK
                        Pwr-Requested Pwr-Allocated Admin Oper
Slot Card-Type          Watts   A @42V Watts   A @42V State State
1    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
2    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
3    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
4    WS-X6748-GE-TX      325.50 7.75   325.50 7.75 on    on
5    VS-S720-10G         338.10 8.05   338.10 8.05 on    on
6    VS-S720-10G         338.10 8.05   338.10 8.05 on    on
7    WS-X6724-SFP        125.16 2.98   125.16 2.98 on    on
system auxiliary power mode = off
system auxiliary power redundancy operationally = non-redundant
system primary connector power limit =   10920.00 Watts (260.00 Amps @ 42V)
system auxiliary connector power limit = 10500.00 Watts (250.00 Amps @ 42V)
system primary power used =              2253.72 Watts (53.66 Amps @ 42V)
system auxiliary power used =            0 Watt
C6509Test#
*Jan 22 09:37:22.317: %C6KPWR-SP-4-INPUTCHANGE: Power supply 2 input has changed
. Power capacity adjusted to 5771.64W
*Jan 22 09:38:58.523: %C6KPWR-SP-4-PSOK: power supply 1 turned on.
*Jan 22 09:38:58.535: %C6KPWR-SP-4-PSREDUNDANTBOTHSUPPLY: in power-redundancy mo
de, system is operating on both power supplies.
C6509Test#
Step 4. I used the current clamp to measure the current on the remaining power input and it reads 4.9 A.
When I multiply the current with voltage I get
P=4.9*230=1127 W.
So why does the show power output gives system power used = 2253.72 Watts, which is actually double value of measured 1127 W? What am I missing?
Thank you in advance for any help on this,
Marin

marin_otto.
Where are you located and what AC line voltage are you operating on (208 or 230v)? I ran into your post and was wondering if you were operating on 208v which is line to line (two hots) and perhaps you are only measuring current on one line, effectively half the power.
Dave

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Message was edited by: impulse_telecom

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Really? Do you have measured data which clearly supports your claims, or are you just holding up an opinion as a matter of fact?
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Furthermore, PSU efficiency dropping to 60% in real world situations supports my results, as it means that the actual system was demanding substantially *less* power than the system in my hypothetical example, making things even *easier* for the PSU. Re-running the above equation with a 60% efficient PSU and 75% of all power demand coming from the +12V rail, we see that the system is only asking for 11.4 amps at +12V at full load with a 6800U installed (and also at full load).
If you want to disagree with my results, that's fine, but don't expect me to take your argument as credible unless you have some actual, measurable data to back up your claims. Saying "this is the way things *really* work because I say so" doesn't cut it, so until you want to break out a multimeter and measure the amps your PSU delivers to the MB on the +12V rail at boot, idle, load, and gaming and then report your results and discuss whether or not they are consistent with your "amps are what counts" hypothesis, I hold my results and conclusions up as being valid, and as soon as I see any measured results which contradict mine, I will gladly stfu about PSU recommendations being needlessly high.

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Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
Address: 00000000fee0f00c Data: 41c1
Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
ExtTag- RBE- FLReset+
DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
MaxPayload 128 bytes, MaxReadReq 128 bytes
DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown, Latency L0 <64ns, L1 <1us
ClockPM- Surprise- LLActRep- BwNot-
LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk-
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
Capabilities: [100 v1] Virtual Channel
Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
Arb: Fixed- WRR32- WRR64- WRR128-
Ctrl: ArbSelect=Fixed
Status: InProgress-
VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=01
Status: NegoPending- InProgress-
VC1: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable+ ID=1 ArbSelect=Fixed TC/VC=02
Status: NegoPending- InProgress-
Capabilities: [130 v1] Root Complex Link
Desc: PortNumber=0f ComponentID=00 EltType=Config
Link0: Desc: TargetPort=00 TargetComponent=00 AssocRCRB- LinkType=MemMapped LinkValid+
Addr: 00000000fed1c000
Kernel driver in use: snd_hda_intel
Kernel modules: snd-hda-intel
cat /proc/asound/card0/codec#0:
Codec: Conexant CX20585
Address: 0
AFG Function Id: 0x1 (unsol 1)
Vendor Id: 0x14f15069
Subsystem Id: 0x17aa2155
Revision Id: 0x100302
No Modem Function Group found
Default PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
GPIO: io=4, o=0, i=0, unsolicited=1, wake=0
IO[0]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
IO[1]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
IO[2]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
IO[3]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
Node 0x10 [Audio Output] wcaps 0xc1d: Stereo Amp-Out R/L
Control: name="Master Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Device: name="CONEXANT Analog", type="Audio", device=0
Amp-Out caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1
Amp-Out vals: [0x3b 0x3b]
Converter: stream=8, channel=0
PCM:
rates [0x560]: 44100 48000 96000 192000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Node 0x11 [Audio Output] wcaps 0xc1d: Stereo Amp-Out R/L
Amp-Out caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1
Amp-Out vals: [0x3c 0x3c]
Converter: stream=0, channel=0
PCM:
rates [0x560]: 44100 48000 96000 192000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Node 0x12 [Audio Output] wcaps 0x611: Stereo Digital
Converter: stream=0, channel=0
Digital:
Digital category: 0x0
PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x5]: PCM AC3
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Node 0x13 [Beep Generator Widget] wcaps 0x70000c: Mono Amp-Out
Control: name="Beep Playback Volume", index=0, device=0
ControlAmp: chs=1, dir=Out, idx=0, ofs=0
Control: name="Beep Playback Switch", index=0, device=0
ControlAmp: chs=1, dir=Out, idx=0, ofs=0
Amp-Out caps: ofs=0x07, nsteps=0x07, stepsize=0x0f, mute=0
Amp-Out vals: [0x00]
Node 0x14 [Audio Input] wcaps 0x100d1b: Stereo Amp-In R/L
Device: name="CONEXANT Analog", type="Audio", device=0
Amp-In caps: ofs=0x4a, nsteps=0x50, stepsize=0x03, mute=1
Amp-In vals: [0x81 0x81] [0x80 0x80] [0x81 0x81] [0x80 0x80]
Converter: stream=0, channel=0
SDI-Select: 0
PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 4
0x17 0x18 0x23* 0x24
Node 0x15 [Audio Input] wcaps 0x100d1b: Stereo Amp-In R/L
Amp-In caps: ofs=0x4a, nsteps=0x50, stepsize=0x03, mute=1
Amp-In vals: [0x4a 0x4a] [0x4a 0x4a] [0x4a 0x4a] [0x4a 0x4a]
Converter: stream=0, channel=0
SDI-Select: 0
PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 4
0x17* 0x18 0x23 0x24
Node 0x16 [Audio Input] wcaps 0x100d1b: Stereo Amp-In R/L
Amp-In caps: ofs=0x4a, nsteps=0x50, stepsize=0x03, mute=1
Amp-In vals: [0x4a 0x4a] [0x4a 0x4a] [0x4a 0x4a] [0x4a 0x4a]
Converter: stream=0, channel=0
SDI-Select: 0
PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x1]: PCM
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 4
0x17* 0x18 0x23 0x24
Node 0x17 [Audio Selector] wcaps 0x30050d: Stereo Amp-Out
Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0
Amp-Out vals: [0x02 0x02]
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 4
0x1a 0x1b* 0x1d 0x1e
Node 0x18 [Audio Selector] wcaps 0x30050d: Stereo Amp-Out
Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0
Amp-Out vals: [0x00 0x00]
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 4
0x1a* 0x1b 0x1d 0x1e
Node 0x19 [Pin Complex] wcaps 0x400581: Stereo
Pincap 0x0000001c: OUT HP Detect
Pin Default 0x042140f0: [Jack] HP Out at Ext Right
Conn = 1/8, Color = Green
DefAssociation = 0xf, Sequence = 0x0
Pin-ctls: 0x00:
Unsolicited: tag=37, enabled=1
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 2
0x10* 0x11
Node 0x1a [Pin Complex] wcaps 0x400481: Stereo
Pincap 0x00001324: IN Detect
Vref caps: HIZ 50 80
Pin Default 0x61a190f0: [N/A] Mic at Sep Rear
Conn = 1/8, Color = Pink
DefAssociation = 0xf, Sequence = 0x0
Pin-ctls: 0x00: VREF_HIZ
Unsolicited: tag=38, enabled=1
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Node 0x1b [Pin Complex] wcaps 0x400581: Stereo
Pincap 0x00011334: IN OUT EAPD Detect
Vref caps: HIZ 50 80
EAPD 0x2: EAPD
Pin Default 0x04a190f0: [Jack] Mic at Ext Right
Conn = 1/8, Color = Pink
DefAssociation = 0xf, Sequence = 0x0
Pin-ctls: 0x00: VREF_HIZ
Unsolicited: tag=38, enabled=1
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 2
0x10* 0x11
Node 0x1c [Pin Complex] wcaps 0x400581: Stereo
Pincap 0x00000014: OUT Detect
Pin Default 0x612140f0: [N/A] HP Out at Sep Rear
Conn = 1/8, Color = Green
DefAssociation = 0xf, Sequence = 0x0
Pin-ctls: 0x40: OUT
Unsolicited: tag=37, enabled=1
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 2
0x10* 0x11
Node 0x1d [Pin Complex] wcaps 0x400581: Stereo
Pincap 0x00010034: IN OUT EAPD Detect
EAPD 0x2: EAPD
Pin Default 0x601700f0: [N/A] Speaker at Sep N/A
Conn = Analog, Color = Unknown
DefAssociation = 0xf, Sequence = 0x0
Pin-ctls: 0x20: IN
Unsolicited: tag=00, enabled=0
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 2
0x10* 0x11
Node 0x1e [Pin Complex] wcaps 0x400481: Stereo
Pincap 0x00000024: IN Detect
Pin Default 0x40f001f0: [N/A] Other at Ext N/A
Conn = Unknown, Color = Unknown
DefAssociation = 0xf, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x20: IN
Unsolicited: tag=00, enabled=0
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Node 0x1f [Pin Complex] wcaps 0x400501: Stereo
Pincap 0x00000010: OUT
Pin Default 0x901701f0: [Fixed] Speaker at Int N/A
Conn = Analog, Color = Unknown
DefAssociation = 0xf, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x40: OUT
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 2
0x10* 0x11
Node 0x20 [Pin Complex] wcaps 0x400781: Stereo Digital
Pincap 0x00000010: OUT
Pin Default 0x40f001f0: [N/A] Other at Ext N/A
Conn = Unknown, Color = Unknown
DefAssociation = 0xf, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x40: OUT
Unsolicited: tag=00, enabled=0
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 1
0x12
Node 0x21 [Audio Output] wcaps 0x611: Stereo Digital
Converter: stream=0, channel=0
Digital:
Digital category: 0x0
PCM:
rates [0x160]: 44100 48000 96000
bits [0xe]: 16 20 24
formats [0x5]: PCM AC3
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Node 0x22 [Pin Complex] wcaps 0x400781: Stereo Digital
Pincap 0x00000010: OUT
Pin Default 0x40f001f0: [N/A] Other at Ext N/A
Conn = Unknown, Color = Unknown
DefAssociation = 0xf, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x40: OUT
Unsolicited: tag=00, enabled=0
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 1
0x21
Node 0x23 [Pin Complex] wcaps 0x40040b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x04, stepsize=0x2f, mute=0
Amp-In vals: [0x02 0x02]
Pincap 0x00000020: IN
Pin Default 0x90a601f0: [Fixed] Mic at Int N/A
Conn = Digital, Color = Unknown
DefAssociation = 0xf, Sequence = 0x0
Misc = NO_PRESENCE
Pin-ctls: 0x20: IN
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Node 0x24 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In
Amp-In caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1
Amp-In vals: [0x00 0x00] [0x00 0x00]
Power states: D0 D1 D2 D3 D3cold
Power: setting=D0, actual=D0
Connection: 2
0x10 0x11
Node 0x25 [Vendor Defined Widget] wcaps 0xf00000: Mono
Is anyone able to confirm this problem or does anyone have a solution? I’m really desperate since I often use my Thinkpad as a big but wonderful portable music player (with headphones of course! Don’t want to annoy my fellow trainpassengers …).
Thanks in advance
Michael

Any updates on this?

Mac Pro max GPU power consumption limit?

Hey guys,
What's the max power consumption limit for the Mac Pro's 2 GPU Mini PCl-e power slots? I have to know because I have to decide which GPU I plan on buying. I'd be thankful if someone helped me with this.
Oh and it's a Mid-2012 12-core Mac Pro.
Cheers!

you might want to look at www.barefeats.com and then probably limit to Mac edition cards. Budget and what you hope to achieve. And whether you want it mostly for games in Windows and w/o boot screen or even willing to add a 2nd PSU just for power and 2 x 8-pin plus 2 x 6-pin power.
EVGA Mac Edition GTX 680 is two 6-pin and $580 area.
AMD has Mac Edition 7950
You will actually find more about unsupported cards and their use on MacRumors. And you do need 10.8.3+ for most anything beyond Apple's ATI 5x70.
I don't think looking at power usage is where I would have started my search.

SGE2010 and SRW2008: Noise level and power consumption?

Hello!
I am looking for information on the actual noise level and power consuption produced by the forementioned models.
Many thanks in advance,
Luca

Luca,
Power consumption and other key hardware product attributes can be found in the following document (in the documents section of this community):
https://www.myciscocommunity.com/docs/DOC-8669
WRT noise levels, here they are:
SGE2010 - 51.4 dB
SRW2008 - N/A - there is no fan inside this switch - uses and external power supply
Thanks,
Ivor

Power consumption when running window XP

Hi guys!
Hmm, recently i've asked a question on the other forums regarding the power consumption of my macbook pro while running window XP.
I realised that when i run window Xp, the battery life can only last around 2 hours, while when I run mac OS X, the battery life is around 4 hours.
However, I've got a reply at the forum and the reply cause me to be worried...
Here's the reply...
Power management is built into Mac OS X. So OS X constantly monitors the power consumption and energy profiles of the system while in use.
Windows XP and Vista, on the other hand, is built off the NT kernel which was NEVER meant for mobile computing. Unlike OS X, Windows XP and Vista does not have built in powe rmanagement: it actually relies on the low level BIOS (which is almost 3 decades old as of today) to manage its power consumption and settings.
Since the Macs do not boot using BIOS but rather, with EFI, to boot Windows, the EFI creates a BIOS emulation layer to support Windows. because this layer is emulated and the user has no control over it, Windows loses ALL forms of power management: the fans on the Mac will run at max, EIST will be disabled, wireless receptivity and hard disks will be set to consume all the energy they can grab, among many other things. Especially for hardware with moving parts like the fan and the hard disk: prepapre for premature hardware failure if left running at max performance all the time.
So can I ask, is this true?
Will running window XP on macbook pro causes the hardware to be spoilt more easily?
I have another friend who runs window XP on macbook and he told me that the hardware will not be affected by it, so can I reassure myself on that?
Thanks a lot. ^^

Yes, Win XP is a battery hog. I have an issue with Win XP not dimming the display the way OS X does before going to sleep. Running Win XP should not harm your hardware, it just drains the battery faster. I am looking into ways of improving batter life with Win XP. For now just make sure that you have the power settings in Win XP set to laptop/portable. If you need instructions on adjusting those settings I can provide them.

Power Consumption Quad-Xserve w max RAM?

Hi,
actually our "old" dualcore Intel xserves consuming approx. 260 Watts (4 RAM Bars, 3 HDDs).
unfortunately there are no Power Consumption Charts for the actual Quad-Core Xserves. Can someone gimme an average value: 3 Ghz Quadcore, 3 HDDs, fully plunged RAM Bank? Shure, it depends on the serverload... roughly speaking... at moderate load?
thanks
timo

What Apple might recommend and what might work in your environment, I do not know.
The APC SmartUPS 1500 works reasonably well for an Xserve and its usual accretion of giblets and accouterments, and Mac OS X Server automatically recognizes this device via its USB connection.
And one thing I've discovered that's not widely listed. Get yourself some short power cords. A handful of appropriately-rated power extension cords (of about one foot in length) makes most UPS products far easier to deal with. These cords are a few dollars each from various vendors, and very useful.

Actual power consumption on WS-C6509-E

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