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Thread: Which power supply to buy?

  1. #1
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    Default Which power supply to buy?

    I have all of the components I need for my first ever PC build. However, I still can’t figure out which PSU to buy. I’ve decided that I want to get a Seasonic platinum series because I’ve heard that they are quite (no coil whine) and they have a good warranty. I’m choosing between either of these two:

    660(SS-660XP2)
    760(SS-760XP2)

    Currently, I’m thinking about the 760XP2 because it’s only around $20 more than the 660 at Newegg. I would appreciate any thoughts on these two models. The most important thing I'm looking for is for it to be modular and not have coil whine.

    Here are the PC components I’ve purchased:

    HARDWARE

    CPU: Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K
    http://www.newegg.com/Product/Produc...82E16819116504

    Motherboard: ASUS SABERTOOTH Z77 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
    http://www.newegg.com/Product/Produc...82E16813131821

    Video Card: EVGA GeForce GTX 670 FTW 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card 02G-P4-2678-KR
    http://www.newegg.com/Product/Produc...82E16814130787

    Hard Drive: Western Digital Caviar Black 1 TB SATA III 7200 RPM 64 MB Cache Internal Desktop Hard Drive Bulk/OEM - WD1002FAEX
    http://www.newegg.com/Product/Produc...82E16822136533

    CPU Cooler: COOLER MASTER Hyper 212 EVO RR-212E-20PK-R2 Continuous Direct Contact 120mm Sleeve CPU Cooler Compatible with latest Intel 2011/1366/1155 and AMD FM1/AM3+
    http://www.newegg.com/Product/Produc...82E16835103099

    SSD Hard Drive: Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)
    http://www.newegg.com/Product/Produc...tem=20-148-442

    Memory: CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Profile Desktop Memory Model CML8GX3M2A1600C9
    http://www.newegg.com/Product/Produc...82E16820233186

    Optical Drive: Lite-On LightScribe 24X SATA DVD+/-RW Dual Layer Drive IHAS424-98 - Retail (Black)
    http://www.newegg.com/Product/Produc...82E16827106335

    Monitor: Dell UltraSharp U2412M Black IPS Panel 24" 8ms Pivot, Swivel & Height Adjustable LED Backlight Widescreen LCD Monitor 300 cd/m2 DC 2,000,000:1 (1000:1) http://www.newegg.com/Product/Produc...82E16824260047

    Speaker: DELL UltraSharp and Professional Series 468-7412 10 W 2.0 AX510 Flat Panel Stereo SoundBar http://www.newegg.com/Product/Produc...k=Dell%20AX510

    Case: Fractal Design Define R4 Black Pearl w/ USB 3.0 ATX Mid Tower Silent PC Computer Case
    http://www.newegg.com/Product/Produc...82E16811352020

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    Default

    Broken record recording:

    If you are only going to use one card, a 450 watt is enough.
    If you are going to OC you might want to push up to 550 watt, error on the side of safety.

    Hence, 660 is overkill, and there is no way you need 760 unless you are going to run two cards.

    That all said at the $110 sale price the seasonic 660 is a pretty good deal. The 760 is actually around $30 more with the sales price.

    PS not without coil whine issues (nearly all have some reports)

    http://www.newegg.com/Product/Produc...scrollFullInfo

    If avoiding coil whine were a paramount consideration, I would consider getting the be quite version that has a better reputation(I don't have any experience with it personally) in this regard.

    http://www.newegg.com/Product/Produc...82E16817222001
    Last edited by mdk777; 09-17-2013 at 10:34 PM.

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    Default

    +1 for the bq P10 550W... SS Platin has a bit of a bad rep in regards to coil whine issues.

    btw: eventhough the 550W P10 is already overkill, you can get the 650W on newegg for the same price as the smaller version if it makes you feel better
    http://www.newegg.com/Product/Produc...82E16817222002


    btw: the P10 550-750W is build by FSP i believe, 850W+ are SS built

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    I'd get the 660 and call it a day. A rig with a pair of GTX670's will usually draw around 500 watts at the wall so a 660 would be just right. Nothing wrong with a little PSU overkill though. I got my TX750 for a song at Best Buy when they had it on sale cheaper than I could get a TX650 so I bit and even tho its way more than I need, it's nice having a dead silent PSU since the fan never seems to kick in. I may go with a 750 again when I retire this one just for that reason.

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    Unfortunately you missed the amazing deal on the Seasonic plat 760 about a week ago. It was $100 with rebate at the time. Considering that, I'd recommend getting the 660, that would have been my own choice if there was a 660 for $90 at the time. Also regarding coil whine, I tested the 760 I just purchased and had almost zero noise with my ear pressed up to the psu. I guess either it's luck of the draw or perhaps seasonic has improved this with the 2013 changes.
    Also funny thing, your build is really similar to my own, I have a 3570k, z77 board, same lcd, just I picked a Corsair 330R instead of Fractal because it had 3 5.25 bays.

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    Default Budget 200W per PU and you're fine.

    My simple rule of thumb is 200W for each CPU and 200W for each GPU. If your PSU is honestly rated, that's all you need, and includes plenty of headroom for a few hard drives, CD-ROM, case fans, etc.

    Now, if you will be operating your machine at full power for extended periods (especially heavy GPU use like folding@home or bitcoin mining), a bit of headroom on the PSU isn't a bad thing, but more than 300W per PU (since 150W per PU is a more *likely* full-power load and PSUs are most efficient around half load) is silly.

    Of course, if you get a super-cheapo PSU with a dishonest rating, then you need to add a lot more. These manufacturers are taking advantage of people's failure to understand how little power they actually need by building a PSU that advertises a large number but only supplies the lower number that's truly required.

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    Quote Originally Posted by tomoyo View Post
    I tested the 760 I just purchased and had almost zero noise with my ear pressed up to the psu. I guess either it's luck of the draw or perhaps seasonic has improved this with the 2013 changes.
    How's the SS-760XP2 (Platinum 760) PSU performance so far, any issues, coil noise or fan loudness or performance issues?

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    Default

    Congratulations on necroing a 3 year old post

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