Results 1 to 5 of 5

Thread: How many watts do I need? Help!

  1. #1
    Join Date
    Jul 2014
    Posts
    1
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default How many watts do I need? Help!

    Hello!

    Greetings from Paraguay!

    This is my build:
    MB: m-ITX MSI Z97i Gaming AC
    CPU: Intel Core i7 4770K OC to 4.2
    RAM: 2 x 8GB 1600 Corsair
    GPU: GeForce GTX 780 Ti
    Drive:
    SSD Samsung 840 EVO 250gb x1
    Seagate 500gb HDD x1
    Seagate 1Tb HDD x1

    How many watts I need for this build?

    Thanks!

  2. #2
    Join Date
    Jun 2010
    Location
    The Netherlands
    Posts
    5,890
    Thanks Thanks Given 
    399
    Thanks Thanks Received 
    261
    Thanked in
    194 Posts

    Default

    A PSU that can deliver 34A @ 12V is enough, so a high-end 450W PSU can be enough.

  3. #3
    Join Date
    Jul 2014
    Posts
    67
    Thanks Thanks Given 
    29
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    Well, you're overclocking your CPU, you have a semi-powerful dedicated graphics card, and you have TWO mechanical hard drives in addition to your SSD.

    I'd say at least 550W, maybe 650W depending on what brand of PSU you're going with. If you go with a cheaper brand, definitely err towards the higher wattage side of that.

    If you were using integrated graphics and not overclocking, you might have been able to get away with 400W. Overclocking and high-end graphics are what really ramp up the power requirements.

    It also depends on your budget. If you can spend at least $80, you can get a much better unit than if you're limited to $50 or less.

    This one looks pretty good:

    http://www.newegg.com/Product/Produc...82E16817182068

    A 550W PSU like this should definitely be sufficient. I don't know if it will end up being more than you need, but it's better to have a little extra and not need it... than need it and not have it.
    Last edited by athenian200; 07-23-2014 at 09:52 PM.

  4. #4
    Join Date
    Jun 2010
    Location
    The Netherlands
    Posts
    5,890
    Thanks Thanks Given 
    399
    Thanks Thanks Received 
    261
    Thanked in
    194 Posts

    Default

    550 or 650? A good 650W PSU would be able to power two GTX 780 Ti's. And if he was using the IGP and not a high-end graphics card his power consumption was less then 150W, which makes a 400W PSU also overkill.

  5. The Following User Says Thank You to -The_Mask- For This Useful Post:

    chasmcity (07-24-2014)

  6. #5
    Join Date
    Jul 2014
    Posts
    67
    Thanks Thanks Given 
    29
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    Quote Originally Posted by -The_Mask- View Post
    550 or 650? A good 650W PSU would be able to power two GTX 780 Ti's.
    That's why I said it depends on the brand. I was thinking along the lines of a good 550W power supply, or a fairly cheap 650W. The cheaper ones don't work as well at their rated output.

    Besides, the difference between 550 and 450 is about $10. I think it's worth that for the peace of mind. Also, power supplies can lose capacity over the years, so I don't like to cut it that close. Don't get me wrong, you can probably get away with it, I just wouldn't do it because I'm a little bit too cautious.

    EDIT: I checked NVidia's website, and they recommend 600W just for the reference design. So my recommendation of 550W isn't unreasonable.


    600 W Minimum System Power Requirement (W)

    From here:
    http://www.geforce.com/hardware/desk...specifications

    They're 250W cards, and that's just the reference design. If they're overclocked or have additional fans, you could easily exceed that.

    And if he was using the IGP and not a high-end graphics card his power consumption was less then 150W, which makes a 400W PSU also overkill.
    I'm not sure I buy that. I might believe 250W. I ran my current rig (a 3770) on IGP while waiting for my GPU to come, and it still drew about 250W from the wall. After adding the graphics card, it drew about 450W normally, but sometimes spiked to 500W under a heavy load.

    It's really that most PSUs that are below 400W are exceptionally low quality and inefficient, plus there aren't a lot of them to start with. 400W is basically "the floor" for the higher quality stuff. There's maybe one Seasonic 350W model I would buy if I knew I wouldn't use much power, but that's about it.
    Last edited by athenian200; 07-24-2014 at 08:16 AM.

Similar Threads

  1. Watts
    By ehume in forum PC Power Supply Discussion
    Replies: 6
    Last Post: 05-21-2017, 11:21 AM
  2. How much PSU watts do I actually need?
    By lemon123 in forum PC Power Supply Discussion
    Replies: 14
    Last Post: 06-07-2016, 08:59 AM
  3. How many watts should I use?
    By barriohippie in forum PC Power Supply Discussion
    Replies: 3
    Last Post: 11-28-2014, 07:13 PM
  4. 430 watts enough?
    By stalker88 in forum PC Power Supply Discussion
    Replies: 8
    Last Post: 05-13-2007, 12:06 AM
  5. how many watts?
    By Fenix-Dark in forum PC Power Supply Discussion
    Replies: 26
    Last Post: 04-25-2007, 03:45 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •