A Call For Information to Develop a PSU Calc

[Spectre]

[Spectre]

I Will Find You
Joined
Aug 29, 2004
Messages
24,889
User mnemonik23 is the creator of the psu calculator at www.extreme.outervision.com

We are in need of a replacement calculator that gives AMPS not WATTS since takaman seems to have gone the way of the dodo. Since someone has shown the iniative to do this it is time for us to do our part. He needs amp draw data for components per rail. If you have it please post here. Let's get behind this so we can have a great resource for our communtiy.

Keep it on topic and lets help get this done!

mnemonik23 if you need anything in particular post here!

Spectre
 
Thanks Spectre.

First of all somebody will need to maintain this page, sort the components by groups, well, keep in in order.

Second, let me ask you this: what if instead of adding each brand to the group, lets say HDD IDE 7200rpm, I will show the one with maximum Amps per rails?
Of course not for CPU and Video Card.
So if there are 100 brands of 80mm fans, you will see only one with max amps.
Same as I do now but for watts: I list only one with maximum power consumption. I understand for most of us it will be an overhead for most components, but...

Let me know what do think.

================================
So I think we will need the following sections:
1. CPU: (AMD, Intel) - I know that from some point they all started to draw power from 12V rail only. Please check the calculator and if I have the CPUs in there that draw power from other rails.

2. Video Cards (sort by brand)

3. RAM

4. HDDs (separate by type, rpm)

5. Drives (DVD, CD, etc.)

6. PCI Cards

7. USB devices

8. Firewire devices.

9. Fans (40, 60, 80, 92, 120, 150mm)

10. Cold cathodes

11. WC kits: pump + fan(s)

12. Other hardware
 
HDD's

I will identify +12 figures in yellow and +5 figures in red as that is their respective color on PSU wires. You are free to look at the detailed data I have dug up, or you could just read this:

Summary:
You will want 3A for spinup as a conservative estimate. Most drives will come in under 2A, but some specify 3A. I am merely supplying data, I will leave the decision on the final startup draw figure that makes it into the calculator to Johnny, Ice, and Spectre. It is unlikely that the relatively short lived spinup current draw will seriously stress quality modern PSUs with beefy +12 output, but I am no expert. For normal operation, you will want to have 1A and 1A (one amp on both rails). Also note that Maxtor drive consume significantly more power than any of their competitors that are detailed here, although they stay within the summary envelopes outlined above. For a good estimate of Maxtor 7200RPM ATA drive power consumption figures, I would raise the +12 figures for WD2500KS by 50%. I will now supply data to backup this summary.

ATA:
Seagate Barracuda 7200.8 Seagate specifies a peak spinup current draw of 2.8A. Seek power is quoted at 12.4W, read write for 12.8W, and idle of 7.2W, once again not broken down by rail. I would estimate the +5 draw to be around 3.5W/.7A in all cases except spinup, with the balance pulled from +12.

Hitachi Deakstar 7K250 1.72A and .068A peak for spinup, Idle consumption totals depend on many platters the drive has - 7.0W for a 3 platter, 5.9W for 2, and 5.0 for 1. These idle figures are for SATA drives, PATA tacks on .6W to all idle figures. Hitachi does not provide read/write or seek power draw figures.

Western Digital WD2500KS
Read/write: .45A/.8A
Idle: .43A/.73A
Standby: .020A/.27A
Sleep: .020A/.25A

Western Digital WD740GD
Read/write: .359A/.706A
Idle: .338A/.770A
Standby: .015A/.314A
Sleep: .016A/.184A

I would put Samsung and Hitachi power consumption figures in the same ballpark as the WD2500KS figures. Seagate will be slightly higher and Maxtor will be signficantly higher. Of particular interest is the very low current draw of WD740GD, despite it being a 10K drive, it actually comes in lower than WD2500KS.

SCSI:
Seagate's Cheetah 10K.7
Spinup: 1.91A/.77A
Idle: .62A/.54A
Read/write: 1.08A/.7A

Seagate Cheetah 15K.4
Spinup: 1.89A/.73A
Idle: .77A/.54A
Read/write: 1.14A/.61A

Fujitsu quotes 3A +12 spinup current for a MAU3147NP and 11.5W idle on the same drive. I'd speculate all but 3-4W of that is on +12. As in ATA, the power consumption of Maxtor SCSI drives will be higher than the data provided for Seagate and Fujitsu but Maxtor doens't tell just how much more.
Click to expand...
 
mnemonik23 said:
2. Video Cards (sort by brand)
Click to expand...

I wouldn't neccesarily do this by brand but by GPU.....IE just 7800gt, x800xl, etc. By brand won't really net a huge beenfit and will take lots of time.

Here are some 9600PRO through x800xt http://www.xbitlabs.com/articles/video/display/ati-powercons.html

FX 5700 through 6800Ultra
http://www.xbitlabs.com/articles/video/display/ati-vs-nv-power.html

Xbit also has the 7800gt, gtx, gtx512, and the x1900 series up.....at the moment i don't have the link.
 
Spectre said:
I wouldn't neccesarily do this by brand but by GPU.....IE just 7800gt, x800xl, etc. By brand won't really net a huge beenfit and will take lots of time.

Here are some 9600PRO through x800xt http://www.xbitlabs.com/articles/video/display/ati-powercons.html

FX 5700 through 6800Ultra
http://www.xbitlabs.com/articles/video/display/ati-vs-nv-power.html

Xbit also has the 7800gt, gtx, gtx512, and the x1900 series up.....at the moment i don't have the link.
Click to expand...
sure, what about HDDS and all other stuff? Should we go by brand or not?
 
mnemonik23 said:
sure, what about HDDS and all other stuff? Should we go by brand or not?
Click to expand...

HDD's are a little harder as they seem to vary a bit more.

jonny thoughts?
 
IMHO, we should not list by brand but try using general categories like performance, plain and such. A small variations of less than 1 amp is not important.

The point of the calculator is to get the minimum amperage and wattage required for a smooth running of the computer. A small excess would serve as a good cushion since the conditions will vary with the environment (more dusty = more power to run in some cases).
 
Since HDD's power consumption seems to vary the most due to the draw on the 12V rail from the motors spinning at different RPM's, I'd say just separate them based on 5400RPM, 7200RPM, 10KRPM, etc.

But even then, the power consumption is minimal from drive to drive, which is why I just use a flat 2A per drive myself.
 
jonnyGURU said:
Since HDD's power consumption seems to vary the most due to the draw on the 12V rail from the motors spinning at different RPM's, I'd say just separate them based on 5400RPM, 7200RPM, 10KRPM, etc.

But even then, the power consumption is minimal from drive to drive, which is why I just use a flat 2A per drive myself.
Click to expand...


:D You heard
 
7200RPM drives and Raptors work within 1A on +12 during all scenarios except spinup. Even high end 15K drives stay under 2A

Clicky

The Maxtor is the only drive to crack 12 watts altogether, but some of that is going to be on +5, so the +12 draw of it is going to be under 1A, and that's during a worst case full bore IOMeter seek test. If you guys make a calculator, 2A on +12 for spinup and 1A operating for ATA drives, including Raptors. The only exception here is, oddly enough, Seagate drives, that need 2.5A on spinup. It's a myth that high spindle speed automatically equals proportionally higher power consumption.

2A on +12 makes sense for SCSI drives - Clicky. SCSI units need 3A for spinup.
 
Alright, I think we are done with HDD.

How about other drives like DVD, CD, CDRW, DVDRW, DVD/CD combo, etc.?
I think here is the same story. I just need more links with data to find out the highest values.


And, more video cards please, especially the latest ones...

Thanks,
mnemonik23
 
My new toys


bell.JPG


http://www.sypris.com/library/documents/IHA-25-100-Datasheet.pdf
27 x IHA-25 Open Loop Hall effect DC Current Sensors

which will in the next couple of months (or less) be attached to my Keithley 2700 DMM\DAQ - 7701 32 channel Multiplexer card
for real time monitoring and logging of current draws

need to build a cable setup, repin an ATX12V v2.0 PSU and thread it, need to calibrate,
need to get PCI\AGP\PCIe riser cards I can employ a few sensors with
(about $400 more or so)
and I need to start testing various configs, but its coming

how many amps does the CPU mobo & GPU draw at spinup?
What is a typical load pattern while gaming? While encoding? Surfing? Heavy Multitasking?
soon we will have some detailed individual answers and some rough average answers


what we really need is a java guru that can do calculators

(what has me filled with glee is the price those run for new, I snagged the whole shooting match for $460 shipped)
 
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