How much will a 300w power supply run?

[dhanson865]

on a 325 VA, 185 Watts UPS I'm running a

Seasonic 400W Tornado A3
Athlon XP 1700+ overclocked to about 1.75 GHz reports as a 2100+
Volcano 7 HS/FAN
5 case fans (80mm mix of TOPOWER and Nexus)
2 hard drives (PATA 7200 RPM 8MB cache)
768MB ram (3 x 256 all doublesided sticks) running at around 140 MHz

The monitor was NOT on the UPS.

The UPS lasted just under 2 minutes (about 113 seconds) with a few web browsers open and an online 2D game keeping CPU activity around 10 to 30%.

According to APC the Typical Backup Time at Half Load is 8.1 minutes (92.5 Watts) and at Full Load it is 1.0 minutes (185 Watts)

If my guestimation is right that puts my draw on the UPS for that test in the 130-150W area.

I used to run basically the same components (minus some ram) on the stock Antec power supply which was a 300W unit PP-303XP with no problems.

I just went to the Seasonic to save on noise/electric costs. I live in the south so waste heat leads to air conditioning more than half the year.
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[mathew7]

I have just played a little Oblivion on my system (see sig, except with just 1 160GB HDD connected). With 1280x1024, 4xAA and no vsync, my APC unit reports 192W (it's USB interface is connected to my father's laptop). And this is my AC power draw (including ~30W for my LCD). So i would say that even with a dualcore AMD with 7800GT (which consumes more power than 7900GT), a good 300W PS would be enough. For GTXs and/or SLI, 400W is still enough. So maybe I sould look to change my Phantom 500 with a Phantom 350
BTW: Antec Phantoms do not have active-PFC.
I would like to try also a Thermaltake 480W PSU (with APFC) which I have and some overclocking results. When I do it, i will post you the results.
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ThermalTake Swing black
Antec Phantom 500
Athlon64 3000+ with Zalman CNPS-7700AlCu
Asus A8N-SLI with Zalman NB32K
Asus EN7900GT with Zalman VF900Cu
Creative Audigy
160GB Seagate ST3160812AS
160GB Seagate ST3160812A
2x80GB Seagate ST380013AS (not used)
Plextor PX-716A
Samsung 710T 17" LCD

[xxkrnxstylezxx]

Hey guys, I'm trying to decide whether I need a new PSU or not. Maybe you can help me out...

Right now, I have a Seasonic Super Tornado 350watt revision A.3.

And these are my specs.

AMD 64 3000+ Winchester
Zalman 7000B HSF
2 x 1GB Corsair XMS PC3200
Evga Nforce4 SLI motherboard
Evga 7800GT CO
Seagate 7200.7 160GB IDE
Maxtor DM10 200GB IDE
Audigy 2 ZS
NEC 3520A DVDRW
Zalman MFC1 fan controller
2 x 120mm Globe fans
Logitech MX duo
Logitech MX1000
Logitech G7

And I think that's it. The reason I ask is that I've been having random freezing problem in games. I'm not sure if the video card is faulty, or I'm just lacking power. I figured it was time for me to upgrade my PSU. However, I used to have an X800XT and 1GB ram with the above specs, and it ran perfectly.

So...a bit confused.

Thanks

[jaganath]

You shouldn't be having any problems with that setup, power-wise:

xbitlabs

[Bar81]

[mexell]

Now for mine:

I have a beQuiet (very famous in Germany) 380W PSU with:

- A64 Venice 3200+ 2.0 GHz
- 2x PATA Hdd (Samsung, 160GB, WD, 120GB)
- 1x SATA Hdd (Maxtor? 200GB)
- XFX GF 7600GS (planning to get a second one)
- 2x Kingston DDR333 512MB (old remains, still unchanged, but working)
- DVD burner, DVD-ROM
- 2x Papst 80mm, 2x Arctic Cooling 80mm (w/ TC)

Plans for the future are:

- go get an Antec P180
- throw all the 80's in trash and get an additional 120 (I think nexus or papst) for cooling of the SLI rig
- go get a second GF7600GS, as it is completely passively cooled and offers all the fancy new graphics effects such as HDR with only <30W peak power consumption - but it's too slow alone;)

Do you think my PSU will let me do this? It's a bit older (about 3 years), but it's known as a very stable and reliable one.

Thanks
mexell

[SD-Plissken]

[*]PSU: Silverstone SST-ST365
[*]CPU: Opteron 148 @ 2.8
[*]Cooling: Scythe Ninja
[*]MB: BioStar T-Force 939
[*]RAM: 1.5GB (2x 512 MB) Infineon (2x256) Kingston HyperX DDR 400
[*]GFX: Geforce 6100
[*]DVD: Nec ND-3550A
[*]HD1: Samsung MP0402H 40GB
[*]HD2 : WD800JD SATA-80GB
[*]HD3 : WD2500YS SATA-250GB
[*]1x120mm Rear Fan

[Goldenhorde]

I want to know if my psu can handle
cranking my cpu core voltage from 1.62 to
the next quantom leap for a faster cpu
iev had it a 2010 stable

modified front case fan cut big round hole
for the cup holder to do a wind tunnel
affect for my second psu
MSI KT266 Pro2-U with a XP2000 @ 1759 1.62 at 37c
Geforce 4 mmx 64 SE fast but no pixil so crap
Clocked at 287/332
with a 12v slot fan
Two 52 24 52x cdwrighters
256x2 ddr333 and a ddr400
ultimit hardrive cooler with nothing in it just cold air pushed through 2 fans
Lazy boy Chair
1 hardrive partitioned too 4 drives
bios update
eight fans all up
air conditioning New Zealand New
A very hard to get saitek p880
Mitsubishi TV via Sharp x380 super speed rewind vcr via Tv out
Dell 15inch 120hurtz monitor through 230W Tv cabnet mounted AT POWER SUPPLY UNIT
Cap Card for decoading sky
300 W PSU
468kbps broardband flatrate
infinite KNOWLAGE AND POWER OF THE NET
UNemployed
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Goldenhorde 3#rd on google

[Bar81]

Update. Here's what I've got so far on my Silverstone SST-30NF fanless 300W:

Opteron 170 @ 2.7Ghz (270x10) [1.44v]
2x 1024MB Mushkin Redline XP4000 @ 270mhz (1350 HTT) [2.8v]
Sapphire A9RD580 PURE Crossfire [1.22v all around]
ATI X1800 XL @ 550/650
Terratec DMX 6fire 24/96 with Roland SCB-55 MIDI (breakout box)
JMicron JMB360 PCI-E x1 eSATA
Western Digital WD740GD Raptor
2x Western Digital SE16 500GB (RAID1)
2x Maxtor MaxLine III 300GB (RAID1)
Maxtor Diamondmax 10 250GB in IEEE1394 enclosure
Western Digital SE16 500GB in eSATA enclosure
4x120mm Nexus fanmated at <1000 rpm
Logitech G5 Laser Mouse
BenQ 1640B DVD-RW
_________________
Intel E8400 l Scythe Ninja Copper l Abit IP35 Pro l 2x 1024MB Corsair Dominator PC2-8500 l ATI Radeon 3870 w/Zalman VF700-Cu l Intel X25-M 80GB l Areca ARC-1200 l 2x WD Caviar GreenPower 1TB (RAID1) l LG GH22NS40 DVD l Terratec DMX 6fire 24/96 w/Roland SCB-55 MIDI l Creative Audigy 2 l Antec P180 Case l Silverstone ST45NF 450W Fanless PSU

[BrianE]

Well, not that this system is any more demanding than Bar81's monster but here's what I've been running for a while, just to add a new/different power supply to the ones already mentioned:

Fortron FSP FSP300-60THN

A64 2800+ Newcastle (130nm) @ stock 1.8Ghz with CnQ only
Asus K8V-MX
2x 512MB Corsair/Samsung generic memory
Powercolor X800 Pro 256mb AGP (stock Mhz)
80GB Maxtor 7200RPM (forget the model)
DVD burner
80mm Coolermaster fan (Speedfan controlled)
2x 80mm slot fan (temporary)
LED light bar and Coolermaster Musketeer

This is a medium-ish power gaming rig that has run 100% stable so far. I have been really impressed with the noise characteristics of this power supply considering it cost less than $40. Even undervolted, the lousy slot fan makes more noise than the PSU, which I haven't heard ramp up yet.

[Edward Ng]

My new machine is as follows:

Seasonic SS-300 (yes, 20-pin PSU), fanmodded and grille removed
Antec SLK2600, front lower openings sealed up, one Nexus 120mm silent fan out back
ASUStek P5B Deluxe
Core 2 Duo E6600
Thermalright SI-128, fanless
4GB DDR2
one 7600GT 256, fanless
one 6600 256, fanless
one 100GB 7200rpm Seagate SATA 2.5" drive, inside a SilentDrive
one 80GB 5400rpm Western Digital PATA 2.5" drive, inside a SilentDrive
Plextor PATA slot loading dual layer DVD burner
Echo Audio Mia MIDI

Can't hear it from halfway across the room, CPU spends most of its time in the upper 40s to low 60s (heavy load) and chipset stays in the low 50s to mid 60s. Stock CPU speed, stock voltage (can't undervolt it, even on latest BIOS, although I can reduce the multiplier from stock--cannot raise it from stock). Flawless operation; spends its time handling Outlook 2003, Trillian, Photoshop CS2, foobar2000 and WoW.

EDIT: The reason for the dual video cards is my trihead setup.

-Ed
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[Bar81]

[Devonavar]

Keep in mind that the 315W number is not the same at the wattage output of the power supply. According to our test, the PSU is ~80% efficient at full load. Assuming that the wattage consumed by the power supply is actually 315W, the true output would be about 315W x 0.80 = 250W ... right around the maximum capacity. You're looking at input, not output. Power supplies are rated by output, the input will always be higher due to efficiency losses in the power supply itself.

Also, wattage ratings on UPS units are unreliable, because the ratings make an assumption about the power factor of the system that it is powering. Your fanless Silverstone has active PFC, which not typical, and makes the wattage rating meaningless. You need to look at the VA rating for a more accurate idea of how much power the UPS can handle before complaining.

[Bar81]

Thanks for the clarification.

APC claims the UPS is 500VA. What would that mean?
_________________
Intel E8400 l Scythe Ninja Copper l Abit IP35 Pro l 2x 1024MB Corsair Dominator PC2-8500 l ATI Radeon 3870 w/Zalman VF700-Cu l Intel X25-M 80GB l Areca ARC-1200 l 2x WD Caviar GreenPower 1TB (RAID1) l LG GH22NS40 DVD l Terratec DMX 6fire 24/96 w/Roland SCB-55 MIDI l Creative Audigy 2 l Antec P180 Case l Silverstone ST45NF 450W Fanless PSU

[burebista]

Usually, 500VA x 0.6 PF coefficient = 300W output

[Bar81]

Interesting. This is the exact model:

http://www.apc.com/resource/include/techspec_index.cfm?base_sku=BP500CLR&total_watts=200
_________________
Intel E8400 l Scythe Ninja Copper l Abit IP35 Pro l 2x 1024MB Corsair Dominator PC2-8500 l ATI Radeon 3870 w/Zalman VF700-Cu l Intel X25-M 80GB l Areca ARC-1200 l 2x WD Caviar GreenPower 1TB (RAID1) l LG GH22NS40 DVD l Terratec DMX 6fire 24/96 w/Roland SCB-55 MIDI l Creative Audigy 2 l Antec P180 Case l Silverstone ST45NF 450W Fanless PSU

[Devonavar]

But, your power supply has active PFC, which means that you're more likely to see 500VA x ~0.98 PF = ~496W. I'd be shocked if your system is drawing that much power... and I would expect your PSU to shut down long before then.

Perhaps you're right, the alarm is tripping around ~315W. It just doesn't make sense to me given the way UPS units work. If you're really curious, pick up a Seasonic Power Angel or a Kill-a-Watt and measure the power directly...

[Bar81]

That's a good idea. Will probably do so when I go back to the US during Christmas (as well as an unpgraded UPS). Thanks for all the info.
_________________
Intel E8400 l Scythe Ninja Copper l Abit IP35 Pro l 2x 1024MB Corsair Dominator PC2-8500 l ATI Radeon 3870 w/Zalman VF700-Cu l Intel X25-M 80GB l Areca ARC-1200 l 2x WD Caviar GreenPower 1TB (RAID1) l LG GH22NS40 DVD l Terratec DMX 6fire 24/96 w/Roland SCB-55 MIDI l Creative Audigy 2 l Antec P180 Case l Silverstone ST45NF 450W Fanless PSU

[jreiter]

Although I do have a very large power supply, I wanted to post here as my actual power usage falls substantially under 300 watts. (My huge power supply is obviously unnecessary.) Power measurements were taken with only my computer (nothing else) plugged into a Kill-A-Watt meter. My power readings are:

Idle (CnQ enabled): 128 watts/204 volt-amps
Full load: 250 watts/370 volt-amps

My machine specs are:

Antec TruePower 2.0 550W psu
Antec P180 case
2x Antec Tri-Cool fans @ low speed
Asus A8N-SLI mobo
- stock Northbridge fan (can't replace it)
Nvidia 7800GT (overclocked @ 470/1.10)
- Arctic Cooling cooler
AMD Athlon64 3800+ Venice (overclocked @ 2.6, overvolted)
- stock heatsink/fan (surprisingly quiet)
2x OCZ ram, 512M each (overclocked, overvolted)
3WARE 7500-4 pci raid card, RAID5 mode
4x Hitachi HDS722516VLAT80 drives, 160G each
IBM 16G drive (for misc test installs, usually off)
Plextor DVD-RW drive
Soundblaster Audigy pci card
Echo Gina24 pci card (plus external break-out box)
Logitech G15 keyboard
Logitech MX518 mouse

As you can see, this is a fairly heavily configured system with overclocking, 5 hard drives, and a full complement of expansion cards. In the past I was actually running a pair of 6800GT video cards (overclocked) in SLI mode, so that would've kicked up the power usage a lot more. That's why I initially bought such a large power supply. To be honest, it appears a high quality 400w psu probably would've been fine as long as the individual 12v rails could each support a high end, overclocked video card. Now days, though, a much smaller psu would do just fine with my single video card.

Maximum machine load was generated by running various combinations of benchmarks, stress tests, and applications/games until I found the combo which generated the highest power consumption. If anyone's interested, the final combo that generated the most load was 3Dmark06 + Prime95 (in-place large FFT test). Most combos came close, but this combo edged out the others by just a few watts.
-joe

[Owen1978]

Reading this thread just makes you laugh at people who go out an buy 600W+ psu's when they are running less than what some of the guys on here have

[Bigg]

I used to have a huge system running off of a Seasonic Super Tornado 300W PSU.

It had:
Abit IC7-MAX3
P4 2.4C
ATI 9600PRO
1GB Corsair XMS
2x Seagate 120GB RAID 0
Maxtor 40GB
CD-ROM
DVD-ROM
CD-RW
10 Fans

It worked just fine. The 3rd HDD, CD-ROM, and 2 fans have since been removed for noise reasons, the CD-RW doesn't work (never bothered to remove it) and I use a fan controller to keep the noise down. The fan controller has one of those silly cold cathode lights, and it works just fine. Unless you have a totally over the top system, you DON'T need more than 300 Watts of power. If you need more than 300 watts of power, your system is probably going to sound like a 747 from the cooling to get rid of that heat, so you have to look at a PSU porblem from the angle that a 300W output is a given, and the system has to be contructed to work well with a 300W PSU. Heck, the iMac uses like 40 watts, and it is a powerful system with a monitor and everything.

[merlin]

Since my Aria obviously runs a 300 watt psu, might as well post what it's running. The following is easily run with plenty of headroom:

Socket A Sempron 2400+ oced to 2ghz(no voltage change)
MSI Microatx Nforce 2 IGP
PNY Geforce 6600 oced about 10% 256MB
NEC DVD+RW
2 HD's
2X512MB RAM
4 Fans
Onboard sound

I haven't done any formal testing, but it seems at most this system draws around 100-110 watts.
_________________
Quiet Wuv Wizzie
Main: Core2 E6600@3.0ghz(1.2v core)w/SI-128, 4GB, Gigabyte EP35, Antec Solo,Corsair 520HX, Yate Loon + Arctic PWM 120mm + 92mm Nexus/Minebea, EVA Geforce 7900GTO at 1.3V(615 core/785 memory) || Secondary/Lan: Core2 E6750@3.0ghz(1.26v core)w/Zalman CNPS7000B, 4GB, Gigabyte G33, Antec Aria, EVGA 8600GT(576/800) || Lappy: Latitude D620 Core 2 T7600, Quadro NVS 110M

[jreiter]

Does anyone else here use any sort of power meter? You can pick those Kill-A-Watt meters up on the net for relatively cheap (around $30 or so). I'd highly recommend it. It'll tell you exactly how much power your system is actually pulling, plus you can use it on other stuff around your house to see what the worst offenders are as far as power consumption.

[disphenoidal]

Generic FSP 300W unit with undervolted Panaflo running:

Sempron 2800 overvolted and OC'd from 1.6 GHz to 2.2GHz
Radeon 9550 overclocked to 9600 Pro clocks
80 GB drive
400 GB drive
2 sticks 512MB DDR-DRAM
Optical drive
_________________
Athlon64 3000+ @ 2.6 GHz, Radeon 9550, Seasonic S12-380, Zalman CNPS7000-Cu, Yate Loon 120mm, Centurion 5 case
Core2Duo E6320 @ 2.4GHz, Seasonic S12-330, Zalman CNPS7000-AlCu, Yate Loon 120mm, Ultra MicroFly

[DArtagnan]

Although I do not have a 300 Watt power supply, I figure that someone might find this useful.

Silenx 400 Watt active PFC (I know, a hated brand, but I bought it before I read about the brand here, and I must say, it is very quiet)

Core 2 Duo 6600
Asus 5PB Deluxe
7900 GTX
2 GB Crucial Ballistix memory DDR2 800
Samsung SP2004C
DVD Burner
DVD Player
3 undervolted nexus fans (2 case 1 CPU)

I was woried about using my 400W psu from my old computer, but it has worked flawlessly in this higher power draw newer computer

[jreiter]

DArtagnan, your new machine actually looks to be a pretty low-power setup compared to many older machines. Here are a few power-saving items on your machine:

1) The 7900 series Nvidia cards are lower power than most of their previous high end cards since they use a smaller process chip.

2) The new Core/Core 2 CPUs are very low power. Much lower power than the P4 series.

3) DDR2 is lower power than DDR.

I'd be surprised if your machine even consumes 250 watts at peak when fully loaded. 200 watts or so is probably your peak, with maybe 100w idle (or less). Yay for new technologies!
-joe

[fabre]

on a 330w Seasonic S12 I run

- 1 x Athlon 64 X2 3800,
- 2 x 512 DDR PC3200
- 2 x WD2500KS
- 1 x ATI X800 XT PE
- 1 x Firewire pci card
- 1 x DVD Writer
- 1 x Floppy
- 2 x 120mm (5V)
- 1 x 92mm

Probably should also mentioned the USB fed peripherals:
- 1 x webcam
- 1 x Scanner
- 1 x Steering wheel w/ pedals
- 1 x compact flash reader

Probably will need to upgrade the psu the day I add more ram and a new video card.

[andyL]

200W Enhance power supply, 2.8 P4 HT, 2x512 DDR 400, 7200 RPM WD HDD, ATI 9600 (AGP), Asus 16X DVDROM, PCI Wireless NIC (IDEQ 210M)

300W Antec true power, 1.4 Athlon Tbird, 7200 RPM IBM HDD, 2X 512 PC 133, 16X DVDROM, TI 4600 (NOW) (Asus A7V133)

300W Antec True Power, Athlon64 3200+, 2 x 512 DDR, Samsung SP2504C, ATI 9200, 16X ASUS DVDROM, 16X Sony DVDRW (THEN) Asus K8VSED

350W Antec Smart Power, Athlon64 3200+, 2 x 512 DDR, Samsung SP2504C, 6800GS 256MB AGP, 16X ASUS DVDROM, 16X Sony DVDRW (NOW) Asus K8VSED

300W Antec is the same power supply, moved it to my son's PC, because it was quiet. Please note, a Smart Power is nowhere near as quiet as a True Power (live and learn.)

Andy

[rei]

heh.

check this out:

http://episteme.arstechnica.com/eve/forums/a/tpc/f/77909585/m/140001491831

300w fortran psu:

"Regardless, this is a beautiful machine, and now we know that a 300W single-fan PSU can power a rig with an nVidia GeForce 8800GTS, Intel E6600 CPU, Seagate 7200.10 HDD, Plextor SATA DVD Burner, Creative X-fi sound card, 4 fans, and 2 gigs of Mushkin PC-5300. Pretty slick."

[rei]

page 7 has a weird 'no posts exist' error btw.