Fly2HMO
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For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 5:14 am

A question for the more computer savy people around here (I'm too lazy to register in a computer forum!!!)

Today I will be getting a new mobo, and shortly after a ATI X800. The video card asks for a 350W power supply. My Dell has only 250W. I calculated how much my power requirements would be using the mobo and the new card, and it turned out to be around 260W. I was thinking about disconnecting the extra cd drive and a few mostly unnecessary items to minimize stress on the power supply. I also have an extra fan that I think I'll use it to give extra cooling to the psu.

My current setup is:
3ghz P4 HT
ATI 9200se, no fan (sucks!!!)
748 RAM
2x 40gb IDE HDDs
1 DVD-rom
1 CDrom
1 pci slot extra fan (wattage negligible)

Will I be good if I remove the cd rom to save some watts, or should I play it safe and get a new PSU?

Thanks  wave 
 
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AirPacific747
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 5:22 am

I think you should play it safe and get a new PSU..
I know it has nothing to do with your case, but a few years ago, my dad asked me if I was able to change the cooler in his pc because it was too noisy, so I got a new cooler which was supposed to be more silent, and so it was, but after a few hours leaving the computer on, it blacked out, and I destroyed the motherboard and graphicscard because the cooler was not good enough. I was only 13 at that time, and it was the first time I tried it, so you cant really blame me  Wink
 
airlinelover
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 5:23 am

Get a new power supply, and make sure it is high quality.. MAybe something around 500W, as you'll want power to spare in case you add more to your comp..

Having an inadequate power supply can be detremintal in many ways. Insufficient power getting to a component can cause it to go bad. It can reduce performance. It can cause your system to just plain not work. Last thing you want is to have to buy a whole new comp because you didn't spend $50 or $60 on a new ps.

Thermaltake is a great brand.

Chris
Lets do some sexy math. We add you, subtract your clothes, divide your legs and multiply
 
ltbewr
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 5:23 am

Go to your local CompUSA, Best Buy, local computer shop/parts store or to an online retailer for a 350-400 watt supply. If you're lucky it will probably will cost maybe $40-50, and a lot less hassle than playing around with the system and screwing something up.
 
jush
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 5:28 am

Dude you defenitely need more power. Fuck that DEll 250 Watts. Just not enough.

If i remember correctly the X800 (I have the X850XT) uses around 250 Watts under full power on its own. So even if you get it running better don't start a game just use Windows.

400 Watts power supplies are not that expensive and you really should think about buying one.
Plugging off a Rom-drive or so doesn't give you the power needed.

Regds
jush
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eilennaei
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 8:48 am

Quoting Jush (Reply 4):
If i remember correctly the X800 (I have the X850XT) uses around 250 Watts under full power on its own.

Good heavens, no! 55 W is about the peak.
http://www.xbitlabs.com/articles/video/display/ati-powercons_5.html

A typical P4 comsumes 75 W, can be up to 120W
http://www.xbitlabs.com/articles/cpu/display/pentium4-570_4.html

A 250W will basically do, but not just any old one that has been in use for years. The caps inside will have deteriorated and at full load is voltage no longer within tolerances --> there will be a shutdown.
There are two types of PSU watts, the "Entry Level Chinese" a.k.a. "El Cheapo" and the Standard. One ELC watt equals about 0.7 Standard watts.

[Edited 2006-01-12 00:54:43]
 
airlinelover
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 8:54 am

Quoting Eilennaei (Reply 5):
A 250W will basically do, but not just any old one that has been in use for years. The caps inside will have deteriorated and at full load is voltage no longer within tolerances --> there will be a shutdown.
There are two types of PSU watts, the "Entry Level Chinese" a.k.a. "El Cheapo" and the Standard. One ELC watt equals about 0.7 Standard watts.

I have to disagree.. Unless you are running an OLD system, without any newer add-ons, 250W is not enough..

Also, you'll want to make sure that the VOLTAGE output is good enough as well.. Just having a higher watt # doesn't guarantee adequate VOLTAGE output.. (but of course, if you could get a 500W PSU I'd do it in a heartbeat)

Chris
Lets do some sexy math. We add you, subtract your clothes, divide your legs and multiply
 
777DadandJr
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 9:01 am

Quoting FLY2HMO (Thread starter):
My Dell has only 250W.

Hey Arturo,
To answer your question, Yes, you will need a new power supply, but not for the reasons you might think. Though, the suggestions above are all valid, the necessity of a new power supply has to do with your Dell system.
You see, Dell uses a proprietary connector for the power supply/mobo connection.
If you replace the mobo with a non-Dell mobo, the connector will not work. Dell uses an extra wire in the connector that is not present in a standard mobo.

Therefore, a replacement mobo, will definately require a new power supply.

Russ
My glass is neither 1/2 empty nor 1/2 full, rather, the glass itself is twice as big as it should be.
 
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EA CO AS
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 9:10 am

I just upgraded my video card to a GeForce 6800GS 256MB GDDR3 PCI Express and it required an upgrade to the power supply as well. It's not inexpensive, really - $50 to $60 and you can easily get close to a 500W power supply. It's always good to go over what you need, just in case.
"In this present crisis, government is not the solution to our problem - government IS the problem." - Ronald Reagan

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eilennaei
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 10:32 pm

Quoting Airlinelover (Reply 6):
I have to disagree.. Unless you are running an OLD system, without any newer add-ons, 250W is not enough..

Also, you'll want to make sure that the VOLTAGE output is good enough as well.. Just having a higher watt # doesn't guarantee adequate VOLTAGE output

I'm not sure what you mean. The PSU will automaticall shut down the system whenever the any of the output voltages drop below the tolerances, or climbs above them. The wattage stated on the PSU label is the sum of the different voltages (3.3V, 5V, -5V, -12V, and +12V) times the max current that is allowed for each of voltage outputs. Whenever the formula MaxNominalPowerForAnOutput >= (Voltage for an [any] output X Current drawn from an output) is not valid, the system will shut down. You will remember DC power means DC voltage times DC current.
Surprising as it may seem, 250W is enough for modern systems, provided the PSU is capable of fullfilling the specs. Many just aren't, even when they were new. What is critical is the handling of the peak current demand at power-on.
 
wukka
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RE: For PC Gurus: Will My Computer Melt?

Thu Jan 12, 2006 10:40 pm

This:

Quoting 777DadandJr (Reply 7):
If you replace the mobo with a non-Dell mobo, the connector will not work. Dell uses an extra wire in the connector that is not present in a standard mobo.

...and this:

Quoting Eilennaei (Reply 9):
I'm not sure what you mean. The PSU will automaticall shut down the system whenever the any of the output voltages drop below the tolerances, or climbs above them. The wattage stated on the PSU label is the sum of the different voltages (3.3V, 5V, -5V, -12V, and +12V) times the max current that is allowed for each of voltage outputs. Whenever the formula MaxNominalPowerForAnOutput >= (Voltage for an [any] output X Current drawn from an output) is not valid, the system will shut down. You will remember DC power means DC voltage times DC current.
Surprising as it may seem, 250W is enough for modern systems, provided the PSU is capable of fullfilling the specs. Many just aren't, even when they were new. What is critical is the handling of the peak current demand at power-on.

are what you should probably be listening to in regards to a new PS / MoBo.

...and yes, I have the credentials and the experience to back it up.
We can agree to disagree.
 
Go3Team
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RE: For PC Gurus: Will My Computer Melt?

Fri Jan 13, 2006 5:50 am

I would go for a power supply of no less than 500 watts. It may be a little much, but your worries will go away. Did your current setup come with the 250w supply? Is the new mobo going to be a Dell as well?
Yay Pudding!
 
dan2002
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RE: For PC Gurus: Will My Computer Melt?

Fri Jan 13, 2006 9:56 am

Quoting 777DadandJr (Reply 7):
Dell uses an extra wire in the connector that is not present in a standard mobo.

The Dell PSU I have doesnt have an extra wire, it has one fewer!


Dan
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