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Nvidia GT 640 run on my PSU?

Last response: in Graphics & Displays
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June 27, 2013 4:35:24 PM

APPROXIMATE PURCHASE DATE: ASAP(this week)

USAGE FROM MOST TO LEAST IMPORTANT: Casual gaming, not expecting ultra high graphics.

CURRENT GPU AND POWER SUPPLY: Intel HD graphics, PSU: Input Voltage:115/230 VAC
Input Frequency: 50-60 Hz
Rated input current: 7.0A/4.0A or 6.0A/2.1A

OTHER RELEVANT SYSTEM SPECS: Dell PSU

PREFERRED WEBSITE(S) FOR PARTS: Newegg, already know card I want.

PARTS PREFERENCES: NVIDIA

OVERCLOCKING: No

MONITOR RESOLUTION: 1024x768

ADDITIONAL COMMENTS: Nothing really

Wondering whether my PSU can handle it.

More about : nvidia 640 run psu

June 27, 2013 5:50:43 PM

I don't think it will be able to take on the GT 640. Most GT 640's require a minimum of a 350 Watt power supply. If you buy the GT 640, your computer probably wont be able to start. I have done similar things before with a smaller difference in Wattage, and it gave me a no-go. I once tried to run a Radeon 6950 (Requires a minimum of 500W) on an AMD system that only had a 450W power supply. Whenever the card was connected to the power supply, the system wouldn't be able to start up because it couldn't handle all of the power. I would recommend buying a new power supply first!
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a b ) Power supply
June 27, 2013 5:50:47 PM

A GT 640 isn't a particularly power hungry GPU but the info you posted on the PSU isn't what we need. If you could give us the model of Dell, and the output of the PSU?

*From the perspective of the power supply, what's coming from the wall outlet is the input, and what goes to the PC components is the output. It's the latter we need.
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June 27, 2013 6:10:13 PM

SchizTech said:
A GT 640 isn't a particularly power hungry GPU but the info you posted on the PSU isn't what we need. If you could give us the model of Dell, and the output of the PSU?

*From the perspective of the power supply, what's coming from the wall outlet is the input, and what goes to the PC components is the output. It's the latter we need.


It is a Dell Inspiron 660, Sadly I am not able to find the output, maybe you can find it from the model I said? :/ 
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Best solution

a b ) Power supply
June 27, 2013 6:18:50 PM

It seems to be a 300W PSU. A PSU upgrade would be advisable.

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a b ) Power supply
June 28, 2013 1:59:44 AM

SchizTech said:
It seems to be a 300W PSU. A PSU upgrade would be advisable.



You must be joking, GT 640 uses only 65 watt http://www.hwcompare.com/12822/geforce-gt-640-ddr3-vs-r...
Also, PCIE slot provides 75 watt, and if you get stronger PSU (Power Supply Unit), where will you plug extra power?

Also, no one asked OP (Original Poster) about his Inspiron 660 form factor, it could be Mini Tower (very easy upgradable) or Slim (more difficult to upgrade), so darthalex99 please identify your PC from the picture below, choose the most appropriate, since it is Inspiron 545 family shown



If you have mini Tower, I can find you GTX 650, which will work on 300 watt power supply (per manufacturer requirements).

So, basically OP was offered to spend money, when it is not necessary.
So, based on this information I have to unselect SchizTech solution as not completely correct, also considering that OP PC can be Slim form factor, completely different rules will apply then.
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June 28, 2013 3:36:16 AM

Kisianik said:
SchizTech said:
It seems to be a 300W PSU. A PSU upgrade would be advisable.



You must be joking, GT 640 uses only 65 watt http://www.hwcompare.com/12822/geforce-gt-640-ddr3-vs-r...
Also, PCIE slot provides 75 watt, and if you get stronger PSU (Power Supply Unit), where will you plug extra power?

Also, no one asked OP (Original Poster) about his Inspiron 660 form factor, it could be Mini Tower (very easy upgradable) or Slim (more difficult to upgrade), so darthalex99 please identify your PC from the picture below, choose the most appropriate, since it is Inspiron 545 family shown



If you have mini Tower, I can find you GTX 650, which will work on 300 watt power supply (per manufacturer requirements).

So, basically OP was offered to spend money, when it is not necessary.
So, based on this information I have to unselect SchizTech solution as not completely correct, also considering that OP PC can be Slim form factor, completely different rules will apply then.


I have the mini tower it seems. Please give me some sources on how a gt 640 would work, because I don't want to waste 100$ :/  According to http://www.evga.com/Products/Product.aspx?pn=02G-P4-264... it requires a 350W PSU?
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a b ) Power supply
June 28, 2013 9:06:09 AM

Well, I will provide you with GTX650 link, this particular model is uses 75 watt only per manufacturer, I you will agree with me that obviously GTX650 is stronger than GTX640, are we agree?

ASUS GTX650-E-2GD5, System Requirements Up to 75W Power Requirement http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Generally manufacturers overstate requirements for their cards by big margin, I am actually surprised that Asus did not. So, there is no reason to go into EVGA site and try to understand their mentality.
And as I mentioned earlier, I think http://www.hwcompare.com/13461/geforce-gt-640-ddr3-vs-g... This one is better in this situation.
Also, you can choose different card, remember that DDR5 is faster than even the same card DDR3 for games, DDR3 usually provides more memory, which is important for higher resolutions, versus DDR5, which provides more speed necessary for games.

So, instead getting new PSU for GT640, you can get GTX650 and keep your PSU, all done for about the same money!
Just make sure that you have have 305 watt PSU by opening side panel and checking the label on PSU, it is said somewhere there, if you can not find wattage, give me model number (usually printed on the left hand side of the label, more likely on to of the label) and I will find it for you.
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June 28, 2013 11:51:21 AM

Kisianik said:
Well, I will provide you with GTX650 link, this particular model is uses 75 watt only per manufacturer, I you will agree with me that obviously GTX650 is stronger than GTX640, are we agree?

ASUS GTX650-E-2GD5, System Requirements Up to 75W Power Requirement http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Generally manufacturers overstate requirements for their cards by big margin, I am actually surprised that Asus did not. So, there is no reason to go into EVGA site and try to understand their mentality.
And as I mentioned earlier, I think http://www.hwcompare.com/13461/geforce-gt-640-ddr3-vs-g... This one is better in this situation.
Also, you can choose different card, remember that DDR5 is faster than even the same card DDR3 for games, DDR3 usually provides more memory, which is important for higher resolutions, versus DDR5, which provides more speed necessary for games.

So, instead getting new PSU for GT640, you can get GTX650 and keep your PSU, all done for about the same money!
Just make sure that you have have 305 watt PSU by opening side panel and checking the label on PSU, it is said somewhere there, if you can not find wattage, give me model number (usually printed on the left hand side of the label, more likely on to of the label) and I will find it for you.


I am pretty sure I have a 300W Psu?
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a b ) Power supply
June 28, 2013 11:57:31 AM

Then you set, you can run 640 or 650 I provided link, what else troubles you?
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June 28, 2013 12:01:54 PM

Kisianik said:
Then you set, you can run 640 or 650 I provided link, what else troubles you?


Ok, sorry I just want to make sure and not be stuck with a none working graphics card :/ 
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