How many watts shopuld a decwent power supply have for a gaming PC - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Hardware > New Systems | Building and Buying
Click Here to Login
Closed Thread
 
Thread Tools Display Modes
 
Old 10-22-2009, 07:07 PM   #1 (permalink)
Super Techie
 
fallenapples's Avatar
 
Join Date: Nov 2008
Location: Toronto, Ontario
Posts: 376
Default How many watts shopuld a decwent power supply have for a gaming PC

I'm going to buy a new psu for my new PC which will be used for gaming. Its current psu is 450 watts. Now I intend on buying a powerful graphics card...about 1GB DRR2 Memory, but I may even get one with less or a more powerful one in the future. How many watts should my psu be just to be safe? And how will I know it will be compatible with my MOBO? The website does not tell you how many watts the graphics cards require to run.
__________________

__________________
|ASUS M5A97 R2.0| AMD FX 6300 3.5 GHZ|16GB (4x4) 1600MHZ DDR3 RAM|ASUS Radeon HD 7770 1GB| Kingston HyperX RAM|Kingston Hyper X 120 GB SSD|WD Green 1TB HDD|


|ASRock N68C-GS FX|AMD Athlon II X3 450 3.2 GHZ|G.Skill 8GB (2x4) 1600MHZ DRR3 RAM |Geforce 9800 GT 1GB DDR5|Seagate 500 GB HDD|



|Macbook Pro- Intel Core i5 2.4 GHZ|8GB DDR3 RAM|Samsung Evo 840 240GB SSD|


fallenapples is offline  
Old 10-22-2009, 10:17 PM   #2 (permalink)
True Techie
 
Join Date: Dec 2007
Posts: 156
Default Re: How many watts shopuld a decwent power supply have for a gaming PC

For one powerful graphics card and (I assume) a dual-quad core cpu I would say a good 550-600 watt power supply would be good. If you are looking to do SLI either now or in the future I would go up to around 700. Just imo...there are some psu wattage calculators out there you could check on also.
__________________

__________________
Core-i7 930
Asus P6X58D Premium
6gb Mushkin DDR3
EVGA GTX 480
OCZ-Vertex SSD
------------------------------
Q6600 (G0) @ Stock
Nvidia 8800GT x2 SLI @ Stock
4GB DDR2-PC6400 @ Stock
500GB Sata + 1TB
Evga 780i
masteroc is offline  
Old 10-22-2009, 10:31 PM   #3 (permalink)
Banned
 
Join Date: Sep 2009
Location: New York(I can see Canada from here!)
Posts: 30
Default Re: How many watts shopuld a decwent power supply have for a gaming PC

Newegg has a power supply calculator that suggests a wattage of a power supply that would support your build. All it requires is filling in a few things(general type of motherboard, video card, etc.) no personal details or anything.

Newegg - Power Supply Calculator
xGodlyPoison is offline  
Old 10-22-2009, 10:35 PM   #4 (permalink)
Newb Techie
 
Join Date: Oct 2009
Posts: 16
Default Re: How many watts shopuld a decwent power supply have for a gaming PC

750 for decent gaming computer.
EnToxication is offline  
Old 10-23-2009, 12:10 AM   #5 (permalink)
I don't overclock
 
Fat.Clown's Avatar
 
Join Date: Dec 2006
Location: offline
Posts: 3,326
Default Re: How many watts shopuld a decwent power supply have for a gaming PC

time after time, wattage calculators has proven themselves to be a joke
most of them are designed with lousy PSU's in mind

anyways...

how many watts your system requires really just depend on what you are putting in your system

obviously you aren't going to grab a power hungry not to mention expensive GTX 295 to go with your 450W PSU

respectively with 1000W PSU, nobody is going to pair it up with a 9400GT

that being said, for a single card configuration, 500W should be more than enough, even if you grab the power hungry HD 5870


on another note to OP, do not be fooled by the watts rating

now a days you should be looking at the amp rating on the 12V rails and build quality

a DYNAPOWER PSU won't come anywhere close to a Seasonic or Enermax
Fat.Clown is offline  
Old 10-23-2009, 01:15 AM   #6 (permalink)
Ultra Techie
 
Nubbleet's Avatar
 
Join Date: Apr 2009
Location: Houston/San Antonio, Texas
Posts: 837
Send a message via AIM to Nubbleet Send a message via MSN to Nubbleet
Default Re: How many watts shopuld a decwent power supply have for a gaming PC

Yeah, like said above, it's not only the watts what matter. The amount of amps on the 12V rail is very important, as well as the company that makes it. Also it is preferable to have a single 12V rail as opposed to multiple.
__________________
4670K @ 4.4GHz 1.18v | GA-Z87X-UD4H | 8GB G. Skill 1866 | 128GB Crucial M4 | 750GB WD Caviar Black | MSI 7850 Twin Frozr | Megahalems | 650TX | CM690
Nubbleet is offline  
Old 10-23-2009, 02:14 AM   #7 (permalink)
Lord Techie
 
S0ULphIRE's Avatar
 
Join Date: Mar 2007
Location: Australia
Posts: 8,669
Send a message via MSN to S0ULphIRE
Default Re: How many watts shopuld a decwent power supply have for a gaming PC

^Don't know about that (the single vs multiple rail thing). In fact, I'm sure it doesn't matter. Whether you're pushing 100A on one 12v rail or 25A on 4 12v rails the output is the same and will power the same amount of hardware.
__________________
"As a result of all this hardship, dirt, thirst, and wombats, you would expect Australians to be a sour lot. Instead, they are genial, jolly, cheerful, and always willing to share a kind word with a stranger, unless they are an American." -- Douglas Adams
S0ULphIRE is offline  
Old 10-23-2009, 02:43 AM   #8 (permalink)
 
zedman3d's Avatar
 
Join Date: Oct 2007
Posts: 2,852
Default Re: How many watts shopuld a decwent power supply have for a gaming PC

Quote:
Originally Posted by S0ULphIRE View Post
^Don't know about that (the single vs multiple rail thing). In fact, I'm sure it doesn't matter. Whether you're pushing 100A on one 12v rail or 25A on 4 12v rails the output is the same and will power the same amount of hardware.
Not exactly. If you know your video cards are sucking up the majority of the amps, and their respective PCIE power connectors run of say 2 of the 4 rails your PSU has, then it can only use what the 2 rails deliver to it. The other two rails go to cpu, harddrives, etc and most of the time, a bit wasted.

By having one rail, you can better distribute the amps/watts. The video cards take as much as they need, so does the cpu and everything else.
zedman3d is offline  
Old 10-23-2009, 03:18 AM   #9 (permalink)
Lord Techie
 
S0ULphIRE's Avatar
 
Join Date: Mar 2007
Location: Australia
Posts: 8,669
Send a message via MSN to S0ULphIRE
Default Re: How many watts shopuld a decwent power supply have for a gaming PC

Quote:
Originally Posted by zedman3d View Post
Not exactly. If you know your video cards are sucking up the majority of the amps, and their respective PCIE power connectors run of say 2 of the 4 rails your PSU has, then it can only use what the 2 rails deliver to it. The other two rails go to cpu, harddrives, etc and most of the time, a bit wasted.

By having one rail, you can better distribute the amps/watts. The video cards take as much as they need, so does the cpu and everything else.
I guess the multi rail PSUs get around this by having rails that are not 'balanced' (e.g. one rail has 18A, one has 20A, and the other two have 24A). So the 18A rail is used for the cpu and hdds, while the higher amperage rails are for the GPUs.

Even with a single rail PSU you're not going to be utilising exactly 100% of the power available. Sure there's probably some loss with multi rail models when they supply so much to the cpu/hdds but that loss is still gonna be in the single rail models.

garh, I'm not so good at explaining stuff I guess I'd say the single rail design has a slight advantage if you're running a bunch of GPUs and then needed to connect 10 hdds as well, but honestly in real life application there's not that much difference IMO.
__________________
"As a result of all this hardship, dirt, thirst, and wombats, you would expect Australians to be a sour lot. Instead, they are genial, jolly, cheerful, and always willing to share a kind word with a stranger, unless they are an American." -- Douglas Adams
S0ULphIRE is offline  
Old 10-23-2009, 07:54 AM   #10 (permalink)
 
zedman3d's Avatar
 
Join Date: Oct 2007
Posts: 2,852
Default Re: How many watts shopuld a decwent power supply have for a gaming PC

Yeah the balanced thing is true. There are for sure ones that have something like 2x 18a then 2x 24a.
__________________

zedman3d is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Old Power supply Guide (2008) Ste New Systems | Building and Buying 223 12-12-2009 09:05 PM
computer hangs on a black screen zenyora Hardware Repairs and Troubleshooting 15 06-10-2009 03:12 PM
Upgrading to 500 watt Power Supply w/ HP beli301 System Upgrades 8 02-27-2009 10:51 AM
Power Supply Question Higach New Systems | Building and Buying 2 01-15-2008 11:35 PM
New Power Supply and RAM go_sharks86 System Upgrades 11 01-13-2008 02:37 AM



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 11:06 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.