Solved

How many watts will my system need for its PSU? Will probably be overclocking a 780 ti. First build!

Hello. Someone brought up a little concern for me when I was looking at PSUs. I figured that a 620-650w psu would be fine but they recommended 750w under the concern that my system would fail. Here's my current build:

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($234.99 @ NCIX US)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: Asus Z97-A ATX LGA1150 Motherboard ($143.49 @ Amazon)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory ($76.50 @ Newegg)
Storage: Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ Amazon)
Video Card: EVGA GeForce GTX 780 Ti 3GB Superclocked ACX Video Card ($649.99 @ Newegg)
Case: Phanteks Enthoo Pro ATX Full Tower Case ($99.99 @ Amazon)
Power Supply: Antec High Current Gamer 620W 80+ Bronze Certified Semi-Modular ATX Power Supply ($83.99 @ Amazon)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.98 @ OutletPC)
Total: $1408.90
Prices include shipping, taxes, and discounts when available

Please let me know what you think. Also I will most likely be getting a 650w psu at the minimum so disregard the current PSU. Thank you!
8 answers Last reply Best Answer
More about watts system psu overclocking 780 build
  1. Under full load at stock clocks your system will use ~375w. That 620w Antec HCG would be just fine.
    http://www.anandtech.com/show/7492/the-geforce-gtx-780-ti-review/15
  2. Looks like a good build. Here are some PSU suggestions
    Non-modular
    Power Supply: XFX 850W 80+ Bronze Certified ATX Power Supply ($69.99 @ NCIX US)
    Semi-Modular
    Power Supply: Antec HCG M 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($74.99 @ NCIX US)
  3. byza said:
    Looks like a good build. Here are some PSU suggestions
    Non-modular
    Power Supply: XFX 850W 80+ Bronze Certified ATX Power Supply ($69.99 @ NCIX US)
    Semi-Modular
    Power Supply: Antec HCG M 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($74.99 @ NCIX US)

    Thank you for the suggestions. Just curious but what do you think of this PSU?
    http://pcpartpicker.com/part/evga-power-supply-220g20750xr
    Since it's only 5 dollars more and gold rated do you think I should go for this one instead of the Semi-modular?
  4. It is not any better quality than the XFX or Antec, but it is not any worse either. It is a fine unit.

    I also suggest getting a normal mid-tower case. That build is not in need of a full tower at all. It will just be huge and take up a TON of space, and be noisy.
  5. tiny voices said:
    It is not any better quality than the XFX or Antec, but it is not any worse either. It is a fine unit.

    I also suggest getting a normal mid-tower case. That build is not in need of a full tower at all. It will just be huge and take up a TON of space, and be noisy.


    What would be a mid-tower case with great airflow that doesn't go beyond that price point? That's my main concern. I chose that one because it has some really good features, what seems like great airflow and very nice cable management. I'm new to building though so this is my first case. What makes it noisy?
  6. Best answer
    Any big case will be loud. That how is works.

    I recommend the HAF922, Corsair 400r, NZXT Phantom 410. All VERY high quality cases and all have good airflow and all the features you could want.

    Your build is not big enough to warrant a full tower. For a first time builder, I do not recommend a full tower case. It is WAY bigger than you think. Look at your desk. That is how tall the case will be standing on the ground.
  7. tiny voices said:
    Any big case will be loud. That how is works.

    I recommend the HAF922, Corsair 400r, NZXT Phantom 410. All VERY high quality cases and all have good airflow and all the features you could want.

    Your build is not big enough to warrant a full tower. For a first time builder, I do not recommend a full tower case. It is WAY bigger than you think. Look at your desk. That is how tall the case will be standing on the ground.


    Alright. Thank you for the suggestions. :)
  8. The Jasmine Dragon said:
    tiny voices said:
    Any big case will be loud. That how is works.

    I recommend the HAF922, Corsair 400r, NZXT Phantom 410. All VERY high quality cases and all have good airflow and all the features you could want.

    Your build is not big enough to warrant a full tower. For a first time builder, I do not recommend a full tower case. It is WAY bigger than you think. Look at your desk. That is how tall the case will be standing on the ground.


    Alright. Thank you for the suggestions. :)


    Size has nothing to do with noise levels. It has to do with the type of fan (some are quieter than others), the speed your fans are running at, design of the case, where you sit in relation to the case, vibrations that make their way into the case (such as HDD or fans making the case vibrate). In fact larger cases are often quieter as you can use large slower spinning fans and still get good airflow.

    That being said I agree that you shouldn't bother with a full tower case. They are a lot larger than you'll expect, they are a pain in the ass if you have to move them and due to their size they won't fit in a lot of desks.

    The cases that tiny voices suggested are all very good cases. If you want something cheaper the Corsair 200R and 300R are excellent budget cases.

    If you're getting something around the $100 mark, my personal favourite is the NZXT H440. It doesn't have space for an optical drive (but how often do you use them anyway?), it has great airflow, packed with noise deadening material so it's about as quiet as your going to get and good cable management options.
Ask a new question

Read More

Overclocking Power Supplies