Seasonic M12II 620w Bronze

Hi,
I'd like to know if this PSU is reliable and has no chance of ever harming my components.

http://www.amazon.co.uk/Seasonic-M12II-620-620-Power-Supply/dp/B003HE260I/ref=sr_1_1?s=computers&ie=UTF8&qid=1350823380&sr=1-1

I'd also like to know if 620w is enough for my setup...

CPU: I5 3570K
MOBO: ASUS P8Z77-V
RAM: Corsair vengeance 8gb
SSD: Samsung 830 256gb
GPU: GTX 670

And a few more things I've yet to decide..

Sound card, Wireless adapter, CPU cooler and various fans.
I'll over clock the CPU & GPU when necessary.

Thanks. :D
25 answers Last reply
More about seasonic m12ii 620w bronze
  1. Seasonic are a great psu maker very reliable i say to ever person though always go for the highest wattage you can afford instead of the minimum per cost as in the future an upgrade could force you to change psu again :s my new limit range is 650-750
  2. It's more than enough for a system with a single GTX 670 - you could use a 450W PSU in fact.
    However it's not quite enough for a system with two GTX 670s in SLI, this is primarily because it does not have enough PCIe connectors; a GTX 670 SLI system requires 4, the M12II Bronze only has two.

    This is a better option for either an SLI system or a single card system because it is a much better unit than the M12II Bronze 620:
    Antec Truepower New TP-750 (£70 @ Scan)
    http://skinflint.co.uk/407704

    You could also get this:
    Seasonic G-550 (£77 @ OCUK)
    http://www.overclockers.co.uk/showproduct.php?prodid=CA-018-SS
    This is also much better than the M12II Bronze 620.

    With the other components you have selected it seems like you have a substantial budget. If that is the case then I don't see why you shouldn't get the best of the best:
    be quiet Dark Power Pro P10 550W (£100 @ Scan)
    http://skinflint.co.uk/790408
  3. Seasonic is the best power supply manufacturer. In fact they make the power supplies for companies that are the highest rated. You can't go wrong with Seasonic.
  4. I actually am using one of those in my WS system in my sig below. Great PSU and actually a bargain.

    Good luck!
  5. Silvune said:
    It's more than enough for a system with a single GTX 670 - you could use a 450W PSU in fact.
    However it's not quite enough for a system with two GTX 670s in SLI, this is primarily because it does not have enough PCIe connectors; a GTX 670 SLI system requires 4, the M12II Bronze only has two.

    This is a better option for either an SLI system or a single card system because it is a much better unit than the M12II Bronze 620:
    Antec Truepower New TP-750 (£70 @ Scan)
    http://skinflint.co.uk/407704

    You could also get this:
    Seasonic G-550 (£77 @ OCUK)
    http://www.overclockers.co.uk/showproduct.php?prodid=CA-018-SS
    This is also much better than the M12II Bronze 620.

    With the other components you have selected it seems like you have a substantial budget. If that is the case then I don't see why you shouldn't get the best of the best:
    be quiet Dark Power Pro P10 550W (£100 @ Scan)
    http://skinflint.co.uk/790408


    Ok so your saying that 550w is more than enough for overclocking a gtx 670 & i5 3570k whilst powering all the rest of my things?? That could really save some cash :D

    That antec 750 is looking really tempting... But I'll probably never go SLI, lotta talk about micro stutter :heink: BUT if it's definitely more reliable and quieter than the M12ii I'd buy it in a heartbeat

    I've been trying to base my choices off this list http://www.eggxpert.com/forums/thread/323050.aspx ~~ and I don't see the G-series on it...
  6. Yep. A quality 500-550 w unit should do the job.

    Any Seasonic, Corsair, XFX, and Antec unit will be great but if you find another unit that you like then either come here and ask us or search up for reviews online.

    I have the Antec NeoEco520 which is a modified nonmodular Seasonic M12 unit and it's a great unit.
  7. lilotimz said:
    Yep. A quality 500-550 w unit should do the job.

    Any Seasonic, Corsair, XFX, and Antec unit will be great but if you find another unit that you like then either come here and ask us or search up for reviews online.

    I have the Antec NeoEco520 which is a modified nonmodular Seasonic M12 unit and it's a great unit.


    Really? This is my first build so I now very little but I was under the impression the more wattage the PSU has, the less it has to work. Therefore it would last longer and have a cleaner, more constant voltage??

    I can't get over how little power I actually need! I thought anything under 600w wouldn't run my setup at stock :o
  8. Pmckenna said:
    Ok so your saying that 550w is more than enough for overclocking a gtx 670 & i5 3570k whilst powering all the rest of my things?? That could really save some cash :D

    That antec 750 is looking really tempting... But I'll probably never go SLI, lotta talk about micro stutter :heink: BUT if it's definitely more reliable and quieter than the M12ii I'd buy it in a heartbeat

    I've been trying to base my choices off this list http://www.eggxpert.com/forums/thread/323050.aspx ~~ and I don't see the G-series on it...

    Yes 550W is definitely enough for your system.

    That Eggxpert Tiered PSU list was out of date the day it was written.
    But the G Series is quite new; it is a cost reduced version of the X Series, so it only has semi-modular cabling vs fully modular, it doesn't have the semi-fanless feature as well as using a cheaper 2BB fan. There are probably one or two more other differences.

    Here is a better source for PSU info:
    http://www.realhardtechx.com/index_archivos/Page541.htm
    The author(s) is/are much more knowledgeable than whoever worked on that Eggxpert list.
  9. Pmckenna said:
    Ok so your saying that 550w is more than enough for overclocking a gtx 670 & i5 3570k whilst powering all the rest of my things?? That could really save some cash :D

    That antec 750 is looking really tempting... But I'll probably never go SLI, lotta talk about micro stutter :heink: BUT if it's definitely more reliable and quieter than the M12ii I'd buy it in a heartbeat

    I've been trying to base my choices off this list http://www.eggxpert.com/forums/thread/323050.aspx ~~ and I don't see the G-series on it...


    Seasonic G series is newer than the M or S lines. It looks like Seasonic is positioning it above those 2 lines which
    would make it an excellent PSU.

    Tom
  10. Pmckenna said:
    I can't get over how little power I actually need! I thought anything under 600w wouldn't run my setup at stock :o

    If you use a Kill-a-watt or similar power metering device to measure how much power your PC is drawing from the wall, you will find out that it is pulling less than 400W even under full-load, which means only ~300W being actually delivered to components.

    The reason GPU manufacturers grossly over-inflate their PSU "requirement" and give people the impression that every system needs a 1000W PSU is because lots of garbage PSUs out there cannot reliably provide more than about half of their label rating... so GPU manufacturers increase their recommendation by 2-3X what the cards actually require.
  11. Ok guys, I've almost decided on the Seasonic G-Series 550w and I'll buy it today, as long as no one objects?

    It's definitely quiet, right? :D

    The 550w G-Series has only two Pci-E connectors, I'm not sure, but does this mean I won't be able to have my Wireless adapter card & sound card along with my GPU??

    Thanks again, you've all been very helpful.
  12. Pmckenna said:
    The 550w G-Series has only two Pci-E connectors, I'm not sure, but does this mean I won't be able to have my Wireless adapter card & sound card along with my GPU??

    Why would that be?

    PCIe slots can supply up to 75W per card which is vastly sufficient to power USB, SATA, GbE, sound, etc. cards that only use 1-15W.

    GPUs are the only add-in PCIe boards found in consumer PCs that use anywhere near 75W so they are the only thing you are likely to ever see require PCIe power connectors.
  13. InvalidError said:
    Why would that be?

    PCIe slots can supply up to 75W per card which is vastly sufficient to power USB, SATA, GbE, sound, etc. cards that only use 1-15W.

    GPUs are the only add-in PCIe boards found in consumer PCs that use anywhere near 75W so they are the only thing you are likely to ever see require PCIe power connectors.


    Thank you for educating the newbie :D

    I'll buy this PSU today, but I've one more Q.
    How much power exactly will my setup use? I ask because if it runs too close to the limit of my PSU for a long period, will it cause problems?
  14. Pmckenna said:
    How much power exactly will my setup use? I ask because if it runs too close to the limit of my PSU for a long period, will it cause problems?

    The same as any other similar system with a single mid-high end GPU and i5: somewhere in the 300-350W peak power range if you can make everything use peak power at the same time which never happens in normal use. A quality 450W PSU would get the job done.

    As for how long you can run a PSU "close to its limits", that is entirely a matter of quality. A high-quality PSU can run at 100% almost indefinitely with little to no adverse effect while some poorly designed PSUs are not even be able to run properly at 50% out-of-the-box.
  15. That Seasonic G-series will cost me £87 inc. delivery from overclockers and I can't get it anyhere else in the uk. Is there a better PSU for my needs around £90??
  16. Go here and get this Corsair from the source of your choice. This is a better option and cheaper if you aren't going with the Seasonic:

    http://www.amazon.co.uk/s/ref=nb_sb_ss_i_4_11/280-9541408-7471624?url=search-alias%3Daps&field-keywords=corsair+650tx+modular&sprefix=corsair+650%2Caps%2C0

    You need to maintain some headroom for growth in your power budget.
  17. COLGeek said:
    Go here and get this Corsair from the source of your choice. This is a better option and cheaper if you aren't going with the Seasonic:

    http://www.amazon.co.uk/s/ref=nb_sb_ss_i_4_11/280-9541408-7471624?url=search-alias%3Daps&field-keywords=corsair+650tx+modular&sprefix=corsair+650%2Caps%2C0

    You need to maintain some headroom for growth in your power budget.


    Ha! Now I'm back to square one again! :lol:

    Was going to get that very PSU bout a week ago but was put off by the supposed noise levels and faulty units... Shouldn't matter though since it'll be inside a Fractal R4.

    Why is it a better option? And how much headroom would I need? It's very unlikely I'll ever go SLI.
  18. Pmckenna said:
    And how much headroom would I need?

    That depends on how much extra stuff you might toss in.

    You have 300-350W for the rig's worst-case power. Then you toss in an extra 100W to cover spikes and aging then maybe another 100W for possible future extras, you get 550W as a reasonably futureproof figure as long as you do not change your mind about no-SLI/CFX.
  19. For a single GPU solution, InvalidError is spot on. 550w is enough.

    Keep this in mind as well. Even if you have a 1000w PSU, if your system only draws 400w of power, that is all it consumes. It doesn't run at 1000w all of the time. Only when the draw/requirement is that high.

    With PSUs, better to have more, than less.
  20. Really quick Q guys, is this the real deal? ~ http://www.amazon.co.uk/Seasonic-X-750-module-ATX12V-Supply/dp/B002VAFDQS/ref=sr_1_1?ie=UTF8&qid=1350933440&sr=8-1

    Why so cheap? Should I get it? I know it's overkill and an older model but it's probably much better quality than the rest, and it's enough for SLI if I decide to do that someday. I like options :D

    So, Seasonic X-Series 750W ~ http://www.amazon.co.uk/Seasonic-X-750-module-ATX12V-Supply/dp/B002VAFDQS/ref=sr_1_1?ie=UTF8&qid=1350933440&sr=8-1

    Or

    Seasonic G-Series 550w ~ http://www.overclockers.co.uk/showproduct.php?prodid=CA-018-SS&campaign=pcm/googleshopping&pup_c=gs
  21. Pmckenna said:
    Really quick Q guys, is this the real deal? ~ http://www.amazon.co.uk/Seasonic-X-750-module-ATX12V-Supply/dp/B002VAFDQS/ref=sr_1_1?ie=UTF8&qid=1350933440&sr=8-1

    Why so cheap? Should I get it? I know it's overkill and an older model but it's probably much better quality than the rest, and it's enough for SLI if I decide to do that someday. I like options :D

    So, Seasonic X-Series 750W ~ http://www.amazon.co.uk/Seasonic-X-750-module-ATX12V-Supply/dp/B002VAFDQS/ref=sr_1_1?ie=UTF8&qid=1350933440&sr=8-1

    Or

    Seasonic G-Series 550w ~ http://www.overclockers.co.uk/showproduct.php?prodid=CA-018-SS&campaign=pcm/googleshopping&pup_c=gs


    Between those two - get the x750 if it's still avail. Outstanding unit. I have the 650w version.

    Tom
  22. Yeah it's reviews are fantastic, but with P&P it totals to £117. Considering that, the G-series is £87 and I'd have to be sure that its worth the extra £30
  23. Pmckenna said:
    Yeah it's reviews are fantastic, but with P&P it totals to £117. Considering that, the G-series is £87 and I'd have to be sure that its worth the extra £30


    That's a big difference ($45-50usd) - Save the money, you still get a quality PSU more than sufficient
    for your needs.

    Tom
  24. toyftw said:
    That's a big difference ($45-50usd) - Save the money, you still get a quality PSU more than sufficient
    for your needs.

    Tom


    I just placed an order for the G-Series. Thank you for saving me £30 Tom. :D

    Big thanks to the rest of you guys as well, and that PSU list that Silvune linked is great. I've booked marked it for future ref.

    Thanks,

    Paul.
  25. Pmckenna said:
    I just placed an order for the G-Series. Thank you for saving me £30 Tom. :D

    Big thanks to the rest of you guys as well, and that PSU list that Silvune linked is great. I've booked marked it for future ref.

    Thanks,

    Paul.



    Gr8 - enjoy your rig

    Tom
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