Intel i7-7700HQ 2.8Ghz quad-core.  16GB RAM.  256GB SSD.  1TB HD.

Qubes 4.0-RC4 runs great.  Install was just a bit tricky.  Mouse/trackpad
did not work during install (worked fine after reboot), had to use keyboard
navigation.  Also used legacy mode in BIOS to get installed.

I had installed Qubes 4.0-RC3 first (before RC4 was out).  I seem to
remember going the UEFI boot route on that and it worked, but when doing
RC4 I either didn't do the same thing or just went with legacy mode and it
worked so I left it at that.

My machine has a 256GB SSD and a 1TB HD.  When I installed RC3 first I let
it use both drives during install.  However, while it ran OK, it was not
super speedy, and I could hear the 1TB HD when in use.  Not loud or
anything, but I was aware of it.  And some operations seemed to take more
time than I would have liked.  However, when I installed 4.0-RC4 I only
specified the 256GB SSD, and that really made a positive difference,
especially during boot time.  Very snappy now.  I have not yet tried to get
the 1TB partitioned and going for storage.

Wi-fi & ethernet work no problems, out-of-the-box.

I'm not able to use dual-screens via the HDMI just yet.  On 4.0-RC3 it
didn't recognize it at all (xrandr shows HDMI but shows "disconnected").
4.0-RC4 does recognize it, and I was able to get screen mirroring to work,
but not extended desktop just yet.  At one point I was able to get the
mouse pointer to seamlessly move from screen to screen, but the display
identifier function did not work, nor would anything but the mouse pointer
show up on the screen.    So there is some hope here I'm thinking with
further tweaking.

When I loaded 4.0-RC3 I spent a bit of time playing with the nvidia drivers
(as explained in several articles).  I was able to get them compiled and
installed (very painful), but then the machine could not be used, ended up
having to blacklist both the nvidia and nouveau drivers.  That brought it
back to life.  With 4.0-RC4 I have not yet tried to mess with any of this.

Bootup takes about 90 seconds from the time I push the button to the time I
can use it fully.   This includes pushing the power button, entering a BIOS
user password, disk encryption password, and Qubes login password.  The USB
keyboard/mouse connect almost instantly after that (within the 90 seconds).

I was able to create and run a Centos 7.4 HVM with no issues.

I've had the one HVM, two F26 PVH AppVMs running simultaneously (plus
sys-usb, sys-net, & sys-firewall) with no issues.  Both running Firefox
(multiple tabs), GIMP, Libreoffice, and terminal simultaneously.

I only tested sleep mode once (closed the lid).  While it did go to sleep,
and was able to wake up, ethernet and attached USB keyboard/mouse never
came back.  I unplugged ethernet and re-attached and still no-go.  Same
with mouse/keyboard... even physically unplugged and plugged back in, did
not come back.  I did not pursue it further as I don't use that function
very often.  But if sleep/suspend is important to you, you may have to do
some tweaking, unless you don't use wired ethernet and USB devices.  Wifi
did come back by itself however.  Sound too.

All in all a very snappy machine so far.

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