iFixit dismantles Valve Steam Machine prototype in latest teardown

By Shawn Knight ยท 12 replies
Dec 19, 2013
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  1. The teardown specialists at iFixit have a knack for getting their hands on the latest gadgets so it should probably come as little surprise that they recently scored a modern rarity: a Steam Machine. Considering Valve only shipped systems to...

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  2. Nvidia recommend a minimum PSU of 600w,so how has valve got a 450 to work under every load possible?
  3. cliffordcooley

    cliffordcooley TS Guardian Fighter Posts: 9,713   +3,691

    GTX 780 - 250W
    i5-4570 - 84W
    CPU/GPU - 334W
    That leaves 116W for the remainder of the system. Seems fine to me.
    Burty117, trgz, 9Nails and 2 others like this.
  4. ikesmasher

    ikesmasher TS Evangelist Posts: 2,996   +1,316

    Only so people cant sue them when they overclock an FX-8350 to 6 GHZ with that GPU and it overloads the PSU.
  5. tomkaten

    tomkaten TS Maniac Posts: 222   +143

    GPU manufacturers usually list some insane PSU recommendations because they have to cover every possible usage scenario, including heavy overclocking. And possibly because it's better to be safe than sorry (sorry, in this case, meaning thousands of complaints on forums and the associated damage to one's reputation).

    But, as Clifford pointed out, that PSU seems to fit those system specs quite well.
    Last edited: Dec 19, 2013
    trgz and cliffordcooley like this.
  6. WangDangDoodle

    WangDangDoodle TS Addict Posts: 199   +71

    It's good that it's a 80 Plus Gold standard on that PSU, because you lose a fair amount of Wattage in the conversion, and even more at high load. I tend to buy 750-850W PSU's with 80 Plus Gold for my computers to be sure that I'm in the "sweetspot" of PSU efficiency, which is usually at 50-60% load. That makes the PSU run silent, it saves some money on the electric bill in the long run and I never have to worry about my PSU not being able to handle a bit extra (like charging my phone via USB3).

    That 450W would be about a 405W with Gold Standard 90% efficiency at 50-60% load, but the efficiency drops a bit more when the PSU is under heavy load. I imagine this system would use a maximum of maybe 365-375W (including drives and at peak consumption) which is cutting it pretty close, but it should work just fine. I'm basing this on the Gold Standard and not the actual PSU, which often surpasses the standard by 1-3% depending on quality.
  7. howzz1854

    howzz1854 TS Evangelist Posts: 611   +94

    the efficiency is calculated by maximum power produced after factoring in the percentage. so in this case, the PSU will at least be able to produce 450 watts at load, or more at short burst peaks. to convert that into actual power draw off the wall will be 562watt off the wall at 80%, or 500 watts at 90%. however, it is never a good idea to have the system outputting at a sustained full load 450 watts, it degenerate the life of the PSU. this is why the Gold, Platnium, Bronze standard, as you can see higher the efficiency, the ACTUAL power draw off the wall will be closer to the rated output, and hence saves you power bill.
    Burty117 and cliffordcooley like this.
  8. WangDangDoodle

    WangDangDoodle TS Addict Posts: 199   +71

    If what you're saying is indeed correct, then a 450W PSU is more than enough for this system. :)
  9. 9Nails

    9Nails TechSpot Paladin Posts: 1,215   +177

    Slap a hybrid hard drive in there and take my money already!
  10. St1ckM4n

    St1ckM4n TS Evangelist Posts: 2,922   +630

    GPU rated @ 250W, realistic max ~280W
    CPU rated @ 84W, realistic max ~90W
    HDD's maxed out, ~30W
    CPU and maybe one case fan, ~20W

    Total is ~420W.

    It's close, but I'm sure Steam did thorough testing.
  11. jeffz6

    jeffz6 TS Rookie Posts: 79

    Sell me that case Steam! Ill purchase it
  12. Burty117

    Burty117 TechSpot Chancellor Posts: 3,144   +911

    Same! that's a fantastic case, I already know of 2 builds I could instantly do with that!
  13. cliffordcooley

    cliffordcooley TS Guardian Fighter Posts: 9,713   +3,691

    According to the "ASRock Z87E-ITX" pages there is
    It took me a little bit to find the slot in the pictures. There is a full mini-PCIe port for mSATA on the back of the motherboard in this setup. So there is an option other than using a hybrid drive. That is if they continue to use this board (or comparable), in the final Steam Machine release. And assuming the Steam Machine can handle multiple drives.
    9Nails likes this.

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