Low voltage shutdown?

O'neal11 · February 2nd, 2007

Approximately how low could voltage go on a household current before a machine decides to turn itself off (go dead).

A client of mine is having random turn-off issues and I cannot find any hardware or software reason of this. Their entire house is on two 20A breakers and I'm wondering if this is the issue.

The machine is blown out and is fairly new so dust/heat isn't the problem. PSU rails look good along with multi-meter readings.

Thanks!

Quakindude · February 2nd, 2007

If that were to be the case, there would be more electronics on the same circuit that would shut down/turn off. Is the breaker popping?

pc_guy · February 2nd, 2007

Good power supplies will run at 50-60V (below the normal 110V) without problems, although this will wear them out faster.

2x20A breakers??? Are you sure it's not 200A.
I live in an apartment townhouse and the circuit breakers are 2x40A for the kitchen, 2or3x20A for the baseboard heater/air-conditioning, a few 15A for the receptacles/lights.

Lead Head · February 2nd, 2007

MOST PSUs can deal with 90-130 volts, or 190-250 volts, while very high quality ones can deal with as low as 65 volts

RangerXLT8 · February 2nd, 2007

This has happened to me at a lan party. There is a small margin where the computer will run(but be kind of sluggish or even turn off) and be on the border of throwing the breaker. So it's possible to have current issues and NOT be throwing a breaker. But there has to BE alot of electronics plugged in to the socket in order for this to happen.

travb1999 · February 19th, 2007

It will most likely make it to 90 volts then pop the breaker or the computer will crash.

February 2nd, 2007	#1
O'neal11 Join Date: Feb 2007 Posts: 2	Low voltage shutdown? Approximately how low could voltage go on a household current before a machine decides to turn itself off (go dead). A client of mine is having random turn-off issues and I cannot find any hardware or software reason of this. Their entire house is on two 20A breakers and I'm wondering if this is the issue. The machine is blown out and is fairly new so dust/heat isn't the problem. PSU rails look good along with multi-meter readings. Thanks!

February 2nd, 2007	#2
Quakindude I'm Diggin it! Join Date: Oct 2006 Location: Fort Rucker, AL. Posts: 2,726 Blog Entries: 7	Re: Low voltage shutdown? If that were to be the case, there would be more electronics on the same circuit that would shut down/turn off. Is the breaker popping? Q6600@ 3.2GHz w/ CNPS9700 \| EVGA 780i \| 2Gb Corsair DDR2-800 \| EVGA GTX 280 1Gb Video \| 1x WD 640Gb HDD, 2x Seagate 400Gb HDD, 1x250Gb WD \| 2x Samsung SH-203B Opticals \| Antec 900 \| ABS/Tagan BZ700 700W PSU

February 2nd, 2007	#3
pc_guy Join Date: Nov 2006 Location: Inside an igloo, Canada Posts: 313	Re: Low voltage shutdown? Good power supplies will run at 50-60V (below the normal 110V) without problems, although this will wear them out faster. 2x20A breakers??? Are you sure it's not 200A. I live in an apartment townhouse and the circuit breakers are 2x40A for the kitchen, 2or3x20A for the baseboard heater/air-conditioning, a few 15A for the receptacles/lights. \|\| AMD Athlon64 3800+ Venice \| Asus A8N5X s939 \| OCZ Premier PC3200 Du-Ch 1GB \| Sapphire X1600Pro 512MB PCI-e \| 1xWD 80Gb & 1xWD 250Gb Sata(s) \| Antec SLK3800B Case \| Enermax NoiseTaker 485W \|\| Last edited by pc_guy; February 2nd, 2007 at 13:31.

February 2nd, 2007	#4
Lead Head Join Date: May 2006 Location: Rhode Island USA Posts: 1,716	Re: Low voltage shutdown? MOST PSUs can deal with 90-130 volts, or 190-250 volts, while very high quality ones can deal with as low as 65 volts Opteron 64 165--1.5GB DDR--ECS KA1 MVP(thanks HL!)--x1800GTO 256MB--Seagate 320GB SATA--Antec 550 Watt--Antec P180

February 2nd, 2007	#5
RangerXLT8 Worker Ant Join Date: Apr 2006 Location: New Jersey Posts: 942	Re: Low voltage shutdown? This has happened to me at a lan party. There is a small margin where the computer will run(but be kind of sluggish or even turn off) and be on the border of throwing the breaker. So it's possible to have current issues and NOT be throwing a breaker. But there has to BE alot of electronics plugged in to the socket in order for this to happen. Quad Core Xeon 3210@3.22ghz GA-EP35C-DS3R 460FSB x 7 -- 60mm Delta fan on NB 2x1gb OCZ3-1333@1380MHZ Sapphire 4870 512mb GDDR5 2x Raptor 150 ADFD RAID 0--WD320YS RE 16mb Storage Samsung Super WriteMaster 20x DVDRW X-Fi eXtremeGamer w\Logitech Z-2300 Silverstone OP650 54A 12v Rail @50C DamgerDen Torture Rack--MC-TDX--Black Ice GTX240--MCP355 Rev 2--Swiftech MicroRes-- Tygon 3603 3/8"ID Logitech G5 - Logitech LX-710 wireless KB Vista Ultimate 64

February 19th, 2007	#6
travb1999 Skype Fanatic Join Date: Feb 2007 Posts: 41	Re: Low voltage shutdown? It will most likely make it to 90 volts then pop the breaker or the computer will crash. SPECS Motherboard- M2N32-SLI Deluxe Wireless edition CPU- AMD X2 4200+ OC 2.6ghz CPU cooler- Zalman CNPS 9500 LED AM2 RAM- 2g OCZ Value series DDR2 667 GFX- 2x 6600GT's SLI HD- Seagate 250G perp recording tech PSU- XCILIO 500W goodpower Capture Card- WinTV PVR 150 DVD/CD drive- SAMSUNG Lightscribe DVD-RAM RW drive

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