Web site for calculating PSU needs
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That's a reasonably good calculator -- if you take the max number it spits out as the rating of the PSU you need. With the hottest AMD/Intel CPU & vidcard + 2 of the hottest & most power everything else, it adds up to ~400W. That's the max you'd get if every component in the system could be made to draw max power simultaneously -- which is just about impossible to do. But given the need for some headroom, using this calculator's number as the PSU rating guide is probably good.
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Good to see an updated power calculator. Maybe you should link to it in a sticky?
Some USB ADSL modems (the ones BT provide definitely) were said to need about 700mA, and wouldn't work with some USB interfaces for that reason. However I would estimate that only about 1-2 devices you have will actually be powered by USB. (Webcam, HIDs, audio devices are the only other things I can think of right now.)
For the most part this is just a minor point, though
Some USB ADSL modems (the ones BT provide definitely) were said to need about 700mA, and wouldn't work with some USB interfaces for that reason. However I would estimate that only about 1-2 devices you have will actually be powered by USB. (Webcam, HIDs, audio devices are the only other things I can think of right now.)
For the most part this is just a minor point, though
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Just for grins, I ran my PIII 866 Gateway machine through the calculations:
Intel 815 Motherboard
P-III 866 (includes HSF with 80 mm Panaflo with Fanmate)
32 MB AGP video (GeForce2 GTS)
Three sticks PC133 RAM (512 MB)
Two IBM Disk Drives (30 GB and 60 GB)
Plextor 12X CD/RW
Pioneer 4X DVD ROM
PCI card - 3COM Ethernet
PCI card - USB ports (4)
PCI Sound Blaster Live
USB Keyboard
USB Cable Modem
USB connection to APC UPS
80 mm rear case fan (Thermaltake)
Total recommended watts = 250
I bought this machine in June 2000, and it is still going strong with the original 200 watt power supply (SFX form factor). I replaced the internal 92 mm PSU fan about 1 year ago with a Panaflo Medium runing about 7 volts on a Fanmate.
Intel 815 Motherboard
P-III 866 (includes HSF with 80 mm Panaflo with Fanmate)
32 MB AGP video (GeForce2 GTS)
Three sticks PC133 RAM (512 MB)
Two IBM Disk Drives (30 GB and 60 GB)
Plextor 12X CD/RW
Pioneer 4X DVD ROM
PCI card - 3COM Ethernet
PCI card - USB ports (4)
PCI Sound Blaster Live
USB Keyboard
USB Cable Modem
USB connection to APC UPS
80 mm rear case fan (Thermaltake)
Total recommended watts = 250
I bought this machine in June 2000, and it is still going strong with the original 200 watt power supply (SFX form factor). I replaced the internal 92 mm PSU fan about 1 year ago with a Panaflo Medium runing about 7 volts on a Fanmate.
Mine is supposedly at 343 Watts. No wonder it's pretty warm, heh.
One thing I'm a little confused on is does it count the HSF for the video card in their power calculations, or do you need to add an extra system fan? Theoretically it's only a couple watts either way, just something that snagged my brain when I was looking at it.
Either way, cool find. Thanks.
One thing I'm a little confused on is does it count the HSF for the video card in their power calculations, or do you need to add an extra system fan? Theoretically it's only a couple watts either way, just something that snagged my brain when I was looking at it.
Either way, cool find. Thanks.
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sorry, but there's something REALLY wrong in those numbers, eg:
AMD Athlon 64 , 89 Watts
Intel Pentium IV 520, 78 Watts
Intel Pentium IV 530-560, 90 Watts
from Anandtech:
config:
AMD Athlon 64 Configuration
Socket-939 Athlon 64 CPUs
2 x 512MB OCZ PC3200 EL Dual Channel DIMMs 2-2-2-10
NVIDIA nForce4 Reference Motherboard
ATI Radeon X800 XT PCI Express
Intel Pentium 4 Configuration
LGA-775 Intel Pentium 4 and Extreme Edition CPUs
2 x 512MB Crucial DDR-II 533 Dual Channel DIMMs 3-3-3-12
Intel 925XE Motherboard
ATI Radeon X800 XT PCI Express
AMD Athlon 64 , 89 Watts
Intel Pentium IV 520, 78 Watts
Intel Pentium IV 530-560, 90 Watts
from Anandtech:
config:
AMD Athlon 64 Configuration
Socket-939 Athlon 64 CPUs
2 x 512MB OCZ PC3200 EL Dual Channel DIMMs 2-2-2-10
NVIDIA nForce4 Reference Motherboard
ATI Radeon X800 XT PCI Express
Intel Pentium 4 Configuration
LGA-775 Intel Pentium 4 and Extreme Edition CPUs
2 x 512MB Crucial DDR-II 533 Dual Channel DIMMs 3-3-3-12
Intel 925XE Motherboard
ATI Radeon X800 XT PCI Express
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Well I certainly don't think it's bad; the double error only apears to happen for USB; the rest of the numbers seem to be about right. It's just a shame that more companies don't make the information about their products easily available <cough>graphics card, sound card, RAID card, chipset... </choke on too much coughing>
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I checked the 1st site from work and it loaded fine and gave a power consumption of 330W for my system. I know that PSU's fan controllers are dependent on temperature rather than the actual load (although temperature is dependent on load), but SPCR give Watts vs dB ratings, so am I unlikely to get any PSU running at under 30dB (stock) with my system?
Even with adequate airflow my Nexus NX-4090 is still loud for me compared to the rest of the system.
Even with adequate airflow my Nexus NX-4090 is still loud for me compared to the rest of the system.
The hd numbers seem a bit high, but overall numbers came out pretty close to the first calculator. About 260 watt for both for my system which is higher than I would've thought but I dont burn cd/defrag hdd/play quake at the same time.
Interesting just how little is coming from the 3.3v rail and the mediocre requirements of the 5v rail.
You have to remember that the figures provided by the power calculator(s) are calculated with the assumption that every component in the computer is running at full load at the same time, a situation that most likely won't happen. Under normal operation your system will not reach those 330W, so finding a PSU with a noise level below 30dBA during normal system load won't be a problem.CX23882-19 wrote:I checked the 1st site from work and it loaded fine and gave a power consumption of 330W for my system. I know that PSU's fan controllers are dependent on temperature rather than the actual load (although temperature is dependent on load), but SPCR give Watts vs dB ratings, so am I unlikely to get any PSU running at under 30dB (stock) with my system?
Even with adequate airflow my Nexus NX-4090 is still loud for me compared to the rest of the system.
I just found another site for PSU wattage calculation, the eXtreme PSU Calculator v1.1:
http://www.extreme.outervision.com/index.jsp
There are more options than the "Journey Systems Power Supply Calculator" and extra calculations for watercooling and overclocking (it doesn't work for underclocking though). According to them, my system draws 296W (maximum peak)... The "Journey Systems Power Supply Calculator" gives a lower number, with 265W (maximum peak) for the same system.
http://www.extreme.outervision.com/index.jsp
There are more options than the "Journey Systems Power Supply Calculator" and extra calculations for watercooling and overclocking (it doesn't work for underclocking though). According to them, my system draws 296W (maximum peak)... The "Journey Systems Power Supply Calculator" gives a lower number, with 265W (maximum peak) for the same system.