Sign in with
Sign up | Sign in
Your question

Will pc with 400 wattage run a 500 wattage graphics card

Last response: in Graphics & Displays
Share
September 27, 2011 9:47:02 AM

I want to play the new Skyrim soon and want to know whether my 400 watt pcu will be enough to run with my new 500 watt graphics card
a b U Graphics card
September 27, 2011 9:55:45 AM

what is the model of the new graphics card?
also please list the rest of your computer's specs
September 27, 2011 10:23:39 AM

What type of question is that?
If your graphics card needs to be mounted in a cpu of minimum 500 watt, then how can it run on a 400 watt PSU?
You can buy an entry level graphx card for that game, which can be power efficient enough to fit in that wattage..!!
Related resources
September 27, 2011 3:10:26 PM

HugoStiglitz said:
what is the model of the new graphics card?
also please list the rest of your computer's specs


I'm looking to buy an XFX radeon 6870

My specs are as follows
A standard dell inspiron 530 with a replaced PSU
OS - Windows vista home premium
CPU - Core2Duo E7200 with two cores running at 2.53Ghz
RAM - 2GBs DDR2 800mhz
Audio - Built in real-tek high def audio
HDD - Seagate 7200rpm 320GB
DVD/RW - Opti arc DVD+-RW 7200 ATA
a b U Graphics card
September 27, 2011 3:13:50 PM

helpmeplease1 said:
I'm looking to buy an XFX radeon 6870

My specs are as follows
A standard dell inspiron 530 with a replaced PSU
OS - Windows vista home premium
CPU - Core2Duo E7200 with two cores running at 2.53Ghz
RAM - 2GBs DDR2 800mhz
Audio - Built in real-tek high def audio
HDD - Seagate 7200rpm 320GB
DVD/RW - Opti arc DVD+-RW 7200 ATA

if your psu came with no brands and in a dell case, odds are it is garbage and wont run the card for a 500w psu. Im not trying to be mean, but thats the truth of the matter.
a b U Graphics card
September 27, 2011 3:14:34 PM

Chirag Borawake said:
What type of question is that?
If your graphics card needs to be mounted in a cpu of minimum 500 watt, then how can it run on a 400 watt PSU?
You can buy an entry level graphx card for that game, which can be power efficient enough to fit in that wattage..!!

there ARE 400w PSU's that can handle well over because of the high quality of the components
a b U Graphics card
September 27, 2011 3:24:29 PM

Below is how you figure out all the parameters for the PSU and graphics card.

As far as PSUs are concerned, be informed. Before you buy any PSU read accurate, objective PSU reviews at reputable sites such as www.jonnyguru.com or www.hardwaresecrets.com on the EXACT model PSU that you are interested in as some brands have good and poor quality PSUs.

You can also get an accurate rating of how much PSU power is required for your current or future system at the PSU calculator link below. Once you know the total PSU watts required then you need to confirm that the 12v rail has enough amps. to support your Vid card(s) and the rest of the PC system.

There are several websites that show the Vid card power consumption in watts. Divide the watts by 12 to determine the amps. required on the 12v rail(s). Add 15 amps for the rest of the PC on the 12v rail and you now know the Minimum total 12v rail amps required under full load. It's best to have at least 5-10 amps. reserve on the 12v rail available under full load so the PSU is not loaded to 100%.

It's also worth noting that people often misunderstand the 80% power rating. This is a rating of the PSU's energy efficiency not it's output. 80% plus PSUs use less grid power to produce the same PC power. If it's 80% Bronze, Silver or Gold the cost savings on electricity is pretty small between Bronze, Silver and Gold unless you are paying very high rates for electricity so any 80% rated quality PSU is fine even if not Gold. For those who leave their PC on 24/7 a quality 80% PSU is a good investment.


http://extreme.outervision.com/psucalculatorlite.jsp

http://www.guru3d.com/article/geforce-gtx-560-ti-sli-re...

http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_5...

September 27, 2011 3:24:39 PM

That card is rated nowhere near 500W.
a b U Graphics card
September 27, 2011 4:07:57 PM

When you tell us the make and model of your 400w psu, we can probably answer your question.
September 27, 2011 4:43:55 PM

beenthere said:
Below is how you figure out all the parameters for the PSU and graphics card.

As far as PSUs are concerned, be informed. Before you buy any PSU read accurate, objective PSU reviews at reputable sites such as www.jonnyguru.com or www.hardwaresecrets.com on the EXACT model PSU that you are interested in as some brands have good and poor quality PSUs.

You can also get an accurate rating of how much PSU power is required for your current or future system at the PSU calculator link below. Once you know the total PSU watts required then you need to confirm that the 12v rail has enough amps. to support your Vid card(s) and the rest of the PC system.

There are several websites that show the Vid card power consumption in watts. Divide the watts by 12 to determine the amps. required on the 12v rail(s). Add 15 amps for the rest of the PC on the 12v rail and you now know the Minimum total 12v rail amps required under full load. It's best to have at least 5-10 amps. reserve on the 12v rail available under full load so the PSU is not loaded to 100%.

It's also worth noting that people often misunderstand the 80% power rating. This is a rating of the PSU's energy efficiency not it's output. 80% plus PSUs use less grid power to produce the same PC power. If it's 80% Bronze, Silver or Gold the cost savings on electricity is pretty small between Bronze, Silver and Gold unless you are paying very high rates for electricity so any 80% rated quality PSU is fine even if not Gold. For those who leave their PC on 24/7 a quality 80% PSU is a good investment.


http://extreme.outervision.com/psucalculatorlite.jsp

http://www.guru3d.com/article/geforce-gtx-560-ti-sli-re...

http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_5...


The power usage for the card is 247 watts. http://www.bit-tech.net/hardware/graphics/2010/10/22/at...

247w/12
= 20.5a + 15
= 35.5a + 5
= 40.5a

My current PSU only has 20a on the 12v rail so does this mean that I have to upgrade it to one with 40a+.

Here is a link to my PSU
http://shop.aktiscomputing.co.uk/colors-it-400w-gold-pf...
a c 174 U Graphics card
September 27, 2011 5:06:56 PM

Oooh, that looks like a PSU-shaped object. I would not even think about trying to power a HD6870 with it.
A quality modern PSU has full range active PFC (no little voltage switch) and some level of 80+ certification for efficiency. Seasonic, Antec, Corsair, XFX, and Enermax/LEPA are among the better brands. Across the pond, I think you can also get FSP, many of which are good. Coolermaster, if available, is generally only a notch or so above junk; HardwareSecrets has failed many of them, as has HardOCP.
September 27, 2011 5:27:04 PM

FlintIronStagg said:
there ARE 400w PSU's that can handle well over because of the high quality of the components



Complete nonsense!!
a b U Graphics card
September 27, 2011 5:29:23 PM

ram1009 said:
Complete nonsense!!


Not at all. Completely true.
a b U Graphics card
September 27, 2011 5:29:35 PM

First of all, note that everything will count when checking your PSU. From the power button to the graphics card.
Many people "assume" information foundon websites saying things like: "For this card you need a 500W supply" and then they dont even state what are the rest of the componenets they are expecting you to have inside your pc.

Generally, every single part has its own requirements in: Wats, Amps and Volts.
And most of those devices have a very clear information that says:
At peak XXX Wats at X Amps with X volts.
At constant work XXX wats at X amps with X volts.

You can then calculate yourself if you will have enought for each thing you want.
Now, remmber that reputable brands are the only ones that you can "somehow" trust on the specifications, and no-name brands are a total waste of money and a potential danger to your computer.

Finally, make sure you get a PSU with a little bit of headroom. This is done for 3 reasons:

A)Possible capacitator agging
B)Efficiency factor at 100% Load is quite bad and breaks sooner.
C)The noice at full load is normally quite disturbing.

For all the reasons i mentioned above, Most people get 800W+ good brand PSU if they dont even need a real 500W. This way you dont worry about calculataing each time you want to overclock, add a new hdd, etc.

Finally, if your PSU is multi-rail, make sure you calculate each rail separatly, and dont overcharge 1 rail (best way is to split everything equaly on the rails that have the same voltage.
a c 104 U Graphics card
September 27, 2011 5:30:43 PM

ram1009 said:
Complete nonsense!!



A good one can.
a b U Graphics card
September 27, 2011 5:30:49 PM

helpmeplease1 said:
The power usage for the card is 247 watts. http://www.bit-tech.net/hardware/graphics/2010/10/22/at...

247w/12
= 20.5a + 15
= 35.5a + 5
= 40.5a

My current PSU only has 20a on the 12v rail so does this mean that I have to upgrade it to one with 40a+.

Here is a link to my PSU
http://shop.aktiscomputing.co.uk/colors-it-400w-gold-pf...


OMG. :ouch: 

Do not even think of using that psu. I would not sue that psu to power my usb coffee warmer. That psu probably doesn't even put out 300w.

Absolute complete fire hazard. Probably already stretched to its maximum limits without a video card.
a b U Graphics card
September 27, 2011 5:33:48 PM

First of all, note that everything will count when checking your PSU. From the power button to the graphics card.
Many people "assume" information foundon websites saying things like: "For this card you need a 500W supply" and then they dont even state what are the rest of the componenets they are expecting you to have inside your pc.

Generally, every single part has its own requirements in: Wats, Amps and Volts.
And most of those devices have a very clear information that says:
At peak XXX Wats at X Amps with X volts.
At constant work XXX wats at X amps with X volts.

You can then calculate yourself if you will have enought for each thing you want.
Now, remmber that reputable brands are the only ones that you can "somehow" trust on the specifications, and no-name brands are a total waste of money and a potential danger to your computer.

Finally, make sure you get a PSU with a little bit of headroom. This is done for 3 reasons:

A)Possible capacitator agging
B)Efficiency factor at 100% Load is quite bad and breaks sooner.
C)The noice at full load is normally quite disturbing.

For all the reasons i mentioned above, Most people get 800W+ good brand PSU if they dont even need a real 500W. This way you dont worry about calculataing each time you want to overclock, add a new hdd, etc.

Finally, if your PSU is multi-rail, make sure you calculate each rail separatly, and dont overcharge 1 rail (best way is to split everything equaly on the rails that have the same voltage.
September 27, 2011 6:52:18 PM

GreenDutchAlien said:
A good one can.

FYI, I do this sort of thing for a living. I've about had enough of preaching about stressing power supplies. All you corner cutters out there can do so without chastising from me.
a c 174 U Graphics card
September 27, 2011 10:18:22 PM

GPU vendors recommend essentially oversized PSUs for their cards in the futile attempt to compensate for all the junk PSUs out there that are barely good for 60%-75% of what is on their label, particularly under realistic conditions (e.g. at 35C-40C, such as the temps inside a working PC, rather than a ridiculously low 25C).
If you go here: http://forums.atomicmpc.com.au/index.php?showtopic=264 you will see that, running flat out, a HD6870 uses about 155W (the 247W you linked was for the entire system, and looked a little low to me).
Clearly, a QUALITY 400W PSU would be enough, although I think 450W-500W would provide a much more comfortable margin, and would be a lot more efficient.
a b U Graphics card
September 28, 2011 12:16:10 AM

Onus said:
GPU vendors recommend essentially oversized PSUs for their cards in the futile attempt to compensate for all the junk PSUs out there that are barely good for 60%-75% of what is on their label, particularly under realistic conditions (e.g. at 35C-40C, such as the temps inside a working PC, rather than a ridiculously low 25C).
If you go here: http://forums.atomicmpc.com.au/index.php?showtopic=264 you will see that, running flat out, a HD6870 uses about 155W (the 247W you linked was for the entire system, and looked a little low to me).
Clearly, a QUALITY 400W PSU would be enough, although I think 450W-500W would provide a much more comfortable margin, and would be a lot more efficient.

I concur
a b U Graphics card
September 28, 2011 12:18:44 AM

ram1009 said:
FYI, I do this sort of thing for a living. I've about had enough of preaching about stressing power supplies. All you corner cutters out there can do so without chastising from me.

Read the posts below yours and go lick your wounds somewhere else. This community isn't made up of a bunch of kids that play Xbox, we all are enthusiasts in building and such and have real world knowledge about these types of things. I've seen quality psu's of lower ratings power cards just fine as well as crap ones with boasted headroom fail
a b U Graphics card
September 28, 2011 1:26:30 AM

GreenDutchAlien said:
A good one can.


I second that ! It's MADNESS.... no THIIIISSSS IIISSS TOMS hardware!! Wow it sounded way better in my mind =3
a c 104 U Graphics card
September 28, 2011 6:18:23 AM

Thanks for that support. Getting attacked somewhat lately ( bad Karma probably ), so this is nice for a change. Same here ; FlintIronStagg made the initial statement of the good psu etc, i only backed that up, who gets the reply ; the weird Dutch alien. :kaola:  :lol: 
a b U Graphics card
September 28, 2011 6:26:15 AM

GreenDutchAlien said:
Thanks for that support. Getting attacked somewhat lately ( bad Karma probably ), so this is nice for a change. Same here ; FlintIronStagg made the initial statement of the good psu etc, i only backed that up, who gets the reply ; the weird Dutch alien. :kaola:  :lol: 

That's because people think im some crazy ass chainsaw wielding lumberjack. I think the name gives off that vibe
a b U Graphics card
September 28, 2011 12:32:45 PM

Meh, we're all in this together, who I say I support is irrelevant. If I say I second your statement and Flint said the same thing, by logic, I support both ^_^!
a c 104 U Graphics card
September 28, 2011 12:50:44 PM

Yeah, i understand that. I didn't mean that only i got backed up by you and Flint doesn't. Only that it's weird that Flint makes the initial comment about the psu and i only backed that up and i get the sweet reply from mr Ram. Similar things happend this week.
Don't care about that anyway, i'm pretty thickheaded, but it's funny that the last week or so, at my work and on the forum there has been some negative energy comming my way. Only get's me more stubborn. :D  Let's get it on !
a b U Graphics card
September 28, 2011 3:38:24 PM

ram1009 said:
FYI, I do this sort of thing for a living. I've about had enough of preaching about stressing power supplies. All you corner cutters out there can do so without chastising from me.


That's great, no time better than now to start learning something then. Feel free to come back and embarass yourself anytime. Were here for ya.

http://www.tomshardware.com/reviews/low-cost-psu-pc-pow...

http://www.tomshardware.com/reviews/power-supply-psu-re...

http://www.tomshardware.com/reviews/power-supply-oem-ma...

a b U Graphics card
September 28, 2011 5:55:41 PM

hey corner cutters! yeah you know with your.... knowledge about PC components... and your... stupid ability to give sound advice to people that are less savvy! I want no part in your hoo-ha delinquent thread filled with nonsense about dem der power supplies!
:: read this as if you were raised in the south its much more funny ::
a c 104 U Graphics card
September 28, 2011 6:00:12 PM

Billy Bob, you darn redneck rebel you, behave! :lol: 
a b U Graphics card
September 28, 2011 6:00:37 PM

helpmeplease1 said:
The power usage for the card is 247 watts. http://www.bit-tech.net/hardware/graphics/2010/10/22/at...

247w/12
= 20.5a + 15
= 35.5a + 5
= 40.5a

My current PSU only has 20a on the 12v rail so does this mean that I have to upgrade it to one with 40a+.

Here is a link to my PSU
http://shop.aktiscomputing.co.uk/colors-it-400w-gold-pf...

to get back on track, yes you will need a new psu to run a card that needs 500w. the ones JTT suggested earlier will do.Antech, Corsair, Seasonic etc. . Cooler master's silent pro series is actually quite good, which their other stuff isnt so hot.
!