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Glenwing

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  1. They're probably including USB device charging power or something like that.
  2. HDMI 1.3–1.4b allows any format up to 340 Mpx/s, which includes 1080p 144 Hz. The highest Supported Format is 1080p 120 Hz. Video formats which are not a Supported Format are allowed, manufacturers just have to provide their own timing specifications instead of having it already calculated for them in the standard (that's what Supported Format means, i.e. there's supporting material for that format included in the HDMI Specification). Here's 1080p 144 Hz over HDMI 1.4 https://linustechtips.com/main/blogs/entry/1429-viewsonic-xg2401-144-hz-over-hdmi-testing/ Secondl
  3. DisplayPort can't read a display when it's powered off, since the identification chip is powered by the monitor rather than through the cable like HDMI. This means powering off the display is the same as disconnecting it, which causes the window positions to shift over to the remaining monitors. It sounds like the power saving mode on the monitor is implemented badly or something, and causing the display's ID chip to no longer be powered/readable (but only sometimes, which is weird). But anyway using HDMI will probably get around this issue.
  4. Please refer to the pinned thread. https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/?section=maximum_limits
  5. HDMI 1.4b fixed several typos in HDMI 1.4a. DisplayPort 1.2b doesn't exist.
  6. Using HDMI instead of DisplayPort will likely solve these issues, if you can.
  7. You would probably want more headroom than that, maybe 600 W.
  8. The power from the wall still passes through the UPS at all times, so you probably would want the UPS to be rated for the maximum power your system will need at any given time (even if it's not on battery power during those loads).
  9. They do not need to be matched. The UPS needs to have a high enough power rating to supply power to the load, just like any power supply, that's all. If the load is 600 W you should get a UPS that has maybe 800 W or more to allow enough headroom. Apparent power rating (VA) is irrelevant here and should be ignored. It is much higher than the real power rating (W) to allow headroom for devices with low power factor, which put additional load on the UPS without drawing more average power. This is typically motorized devices which have inductive loads with lower power factor. PC power
  10. If it you're already using it and it works, then it works. Don't worry about it.
  11. Adaptive-Sync is a VESA standard for variable refresh rate. It is only a feature of DisplayPort. For variable refresh rate over HDMI, some older monitors implement the FreeSync over HDMI protocol created by AMD. These will only work with AMD cards. Some new displays may may also support HDMI Game Mode VRR protocol introduced in HDMI 2.1. This is supported by NVIDIA cards, but is very rare right now, only a few TVs have it to my knowledge.
  12. https://linustechtips.com/main/blogs/entry/1429-viewsonic-xg2401-144-hz-over-hdmi-testing/
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