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Need help estimating watt usage

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January 27, 2012 5:20:23 PM

I'm trying to do some rough estimates of how much I'd save using regular 80PLUS, bronze, silver, gold, or platinum and needed help estimating how much watts I'd use for certain parts of my day.

My system requires about 500 W I believe. These are my parts:

CPU: AMD Athlon II X3 455 Triple Core Processor
CPU Fan: fan that comes w/ CPU
Motherboard: MSI 760GM-P23 (FX) AM3+ AMD 760G Micro ATX AMD Motherboard
Video: MSI Microstar ATI Radeon HD5670 1GB DDR3 VGA/DVI/HDMI PCI-Express Video Card.
RAM: Kingston HyperX 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 Desktop Memory Model KHX1333C7D3K2/4GX
Harddrive: HITACHI HDS721050CLA362 (0F10381) 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Case: AZZA Triton 401 Black SECC Steel ATX Mid Tower Computer Case
Optical: ASUS 24X DVD Burner - Bulk 24X DVD+R 8X DVD+RW 12X DVD+R DL 24X DVD-R 6X DVD-RW 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM Black SATA Model DRW-24B1ST/BLK/B/AS - OEM

Roughly 2/3 of the day, I will have the system idle in sleep mode. Is this something like 150W average?
Roughly 1/6 of the day, I will be surfing the web with the system. Is this something like 250W average?
Roughly 1/6 of the day, I will be playing games and watching videos. Is this something like 500W average?

Are these estimates reasonable?

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a b ) Power supply
January 27, 2012 5:28:36 PM
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not even close

idle you looking at bout 25-30 watts max

web surfing you at bout 60-75 watts max

gaming no more then 200 watts max
January 27, 2012 5:33:08 PM

obsidian86 said:
not even close

idle you looking at bout 25-30 watts max

web surfing you at bout 60-75 watts max

gaming no more then 200 watts max


oh wow. my friend recommended me to get 500W or higher PSU for my parts, if it's only using 200W when I game, why do I need so much?
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January 27, 2012 5:38:21 PM

Nope, you'd better get a lower wattage like a seasonic 430, or antec 380 for that matter... better efficiency, quiet, cooler and all the bells and whistles.
a c 105 ) Power supply
January 27, 2012 5:47:23 PM

GPU manufacturers tend to overstate their requirements in the futile attempt to compensate for all the cheap PSU-shaped objects out there. Your system would run nicely on a quality 300W PSU, like one of the 80+ bronze Seasonic or FSP PSUs in that range.
However, since you play some games, it is entirely probably that you'll want to upgrade your GPU some day, possibly soon. A 380W Antec Earthwatts can handle up to a HD6850 without any difficulty. If you might want something stronger, you may want something in the 500W range, but you certainly don't need it now. The 380W Earthwatts has been my standard PSU in budget and modest gaming builds for years now.
a c 105 ) Power supply
January 27, 2012 7:01:40 PM

Your 650W+ section has a couple of poopers in it, such as a CM GX and an old Chokemax design.
a b ) Power supply
January 27, 2012 7:31:52 PM

Yeah, I would rework that list a little...

Coolmax is a known mislabeler.
January 27, 2012 7:44:12 PM

I checked the Coolmax and they have cleaned up a fair bit recently
January 27, 2012 7:45:49 PM

I have revised that page as I identify new models of PSU
a c 105 ) Power supply
January 27, 2012 8:07:21 PM

The one that's on there now though is an older design. The little voltage switch gives it away as not worth a second look in today's market.
Proximon has an excellent list of current recommended PSUs.
January 27, 2012 8:14:43 PM

Now that 80 Plus Platinum models are on the market I have added a couple and plan to look at more soon.

I plan to update the 650W section in about a week, working on a DRM page today.
a c 273 ) Power supply
January 27, 2012 10:08:03 PM

obsidian86 said:
not even close

idle you looking at bout 25-30 watts max

web surfing you at bout 60-75 watts max

gaming no more then 200 watts max

^+1 very reasonable estimates.
Current system
i7 860
P55 mobo
8gb 1600Mhz ram
1.5TB hdd
5850
Auzentech soundcard
2 DVD drives
HX-750W
24" monitor
2.1 speakers
All plugged into UPS that monitors power draw.
Power draw as i type this = 117W.
When gaming = under 200W.
January 28, 2012 2:06:19 AM

The HX750 is a respectable PSU and that should be enough for the hardware ^^
a c 105 ) Power supply
January 28, 2012 2:12:47 AM

The HX750 is an entirely different class of PSU from the low-wattage unit needed here. To buy one for this PC would be an utter waste of money; to add insult to injury, most of the time it would be operating in a very inefficient part of its range, well under 10%.
a c 273 ) Power supply
January 28, 2012 2:19:09 AM

I never suggested it(HX-750) i just posted my specs and power consumption backing up @ obsidian86's post.
January 28, 2012 2:29:12 AM

the 5850 when being used for games may draw as much as 200W of power all by itself
January 28, 2012 2:40:59 AM

vegan is talking about davcon's setup, not the OP. OP doesn't need anything close to what davcon needs
a c 105 ) Power supply
January 28, 2012 3:11:42 AM

Fair enough. Hopefully we will hear from the OP soon.
a c 144 ) Power supply
January 28, 2012 3:22:43 AM

A few years ago, I bought a Kill-A-Watt power meter for other purposes, but it lives in my computer room full time.

One of my systems has an OC'd Q9550, 4 GB RAM, a GTX260-216, a Gigabyte EP45-UD3P motherboard, 3 hard drives and an optical, and a Soundblaster card all powered by a Corsair TX750.

Running 3 instances of Prime95 to load the CPU and 3DMark06 to load the GPU (my "standard" and easily repeatable load), it pulls 375 watts from the wall as measured by my Kill-a-Watt meter. Figuring 80% PSU efficiency, the system pulls 300 watts from the PSU.

At the time I bought the PSU, I was planning on CrossFiring a couple of 4870's (I have one in another computer).

Coolmax is one of the decent (relatively speaking) PSU's available here in Saudi Arabia. They are not bad if you derate them by 20% or so (600 w to 500 watt, 500 to 400. That makes them more than adequate for basic office or internet machines.

My standard, small machine PSU used to be the Corsair CX400.

January 28, 2012 10:08:58 AM

The OP has a HD 5650 which is a less demanding display adapter.
January 28, 2012 12:35:00 PM

Best answer selected by opqpop.
a b ) Power supply
January 28, 2012 12:37:41 PM

This topic has been closed by Mousemonkey
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