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Windows 7: Using gpu without enough watts?

06 May 2012   #1
KayHai

Windows 7 Home Premium 32bit
 
 
Using gpu without enough watts?

I just got a new Geforce 8400gs by galaxy. The card requires about 300watts but I only have 250. What will most likely happen if I use it? will it work?


My System SpecsSystem Spec
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06 May 2012   #2
zigzag3143

Win 8 Release candidate 8400
 
 

If it works at all it will be unstable and you may damage both the PSU and the card. Remember if your PSU is 300w that has to be enough for the card, cpu, ram, HD, etc, etc.
My System SpecsSystem Spec
06 May 2012   #3
windude99

Windows 7 Professional x64 Service Pack 1
 
 

Quote   Quote: Originally Posted by KayHai View Post
I just got a new Geforce 8400gs by galaxy. The card requires about 300watts but I only have 250. What will most likely happen if I use it? will it work?
The manufaturers always overestimate that stuff. I run a gpu made for 400 watt power supplies on a 380 watt power supply.
My System SpecsSystem Spec
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06 May 2012   #4
James7679

Windows 7 Home Premium x64
 
 

It may work, it may not. My gpu calls for 600 watts. My psu is only 550, but since it is a high quality psu, it provides more than enough juice arty the 12 volt rail.

As far as side effects, well, anything from a no boot, all the way to catastrophic failure. Use the thermaltake psu calculator online to see how stand.
My System SpecsSystem Spec
06 May 2012   #5
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 SP1, Home Premium, 64-bit
 
 

Hmmmm........

It says here:

GeForce 8400 FAQ

That the power consumption is 71 watts.

Where did you hear about 300 watts?
My System SpecsSystem Spec
07 May 2012   #6
KayHai

Windows 7 Home Premium 32bit
 
 

Quote   Quote: Originally Posted by ignatzatsonic View Post
Hmmmm........

It says here:

GeForce 8400 FAQ

That the power consumption is 71 watts.

Where did you hear about 300 watts?
well you know... on the box.
My System SpecsSystem Spec
07 May 2012   #7
Joshatdot

Windows 7 Professional x64
 
 

Newegg.com - Galaxy 84GFE6DC2EMM GeForce 8400 GS 512MB 64-bit DDR2 PCI Express 2.0 x16 HDCP Ready Low Profile Ready Video Card
- System Requirements - Minimum of a 300 Watt power supply.

It's not that the 8400GS draws more than 300w, it's a recommendation that your PSU is 300w for everything. Post up or edit your System Specs, and we can calc, guesstimate your total power draw. And if you can, take a pic of your PSUs sticker, or tell us exactly what it says for brand and model.
My System SpecsSystem Spec
07 May 2012   #8
bobkn

Windows 7 Pro X64 SP1
 
 

Quote   Quote: Originally Posted by ignatzatsonic View Post
Hmmmm........

It says here:

GeForce 8400 FAQ

That the power consumption is 71 watts.

Where did you hear about 300 watts?
71W seems like a lot for a low-end card, but I suppose that nVidia knows their own products.

If KayHai is combining this with a 125W CPU, that's worrisome with a 250W PSU. Things might be OK with a 65W CPU.
My System SpecsSystem Spec
11 May 2012   #9
KayHai

Windows 7 Home Premium 32bit
 
 

Quote   Quote: Originally Posted by Joshatdot View Post
Newegg.com - Galaxy 84GFE6DC2EMM GeForce 8400 GS 512MB 64-bit DDR2 PCI Express 2.0 x16 HDCP Ready Low Profile Ready Video Card
- System Requirements - Minimum of a 300 Watt power supply.

It's not that the 8400GS draws more than 300w, it's a recommendation that your PSU is 300w for everything. Post up or edit your System Specs, and we can calc, guesstimate your total power draw. And if you can, take a pic of your PSUs sticker, or tell us exactly what it says for brand and model.
Dual core AMD athlon 64 X2 2gigs of RAM 320gig hard drive SATA 7200 RPM

DVD optical SATA drive
My System SpecsSystem Spec
16 May 2012   #10
Joshatdot

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by KayHai View Post
Quote   Quote: Originally Posted by Joshatdot View Post
Newegg.com - Galaxy 84GFE6DC2EMM GeForce 8400 GS 512MB 64-bit DDR2 PCI Express 2.0 x16 HDCP Ready Low Profile Ready Video Card
- System Requirements - Minimum of a 300 Watt power supply.

It's not that the 8400GS draws more than 300w, it's a recommendation that your PSU is 300w for everything. Post up or edit your System Specs, and we can calc, guesstimate your total power draw. And if you can, take a pic of your PSUs sticker, or tell us exactly what it says for brand and model.
Dual core AMD athlon 64 X2 2gigs of RAM 320gig hard drive SATA 7200 RPM

DVD optical SATA drive
Well according to eXtreme PSU calc, 250w is minimum .. but given we do not know your PSUs brand and model, your 250w might be PEAK watts.
My System SpecsSystem Spec
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 Using gpu without enough watts?




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