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On Mon, 24 Jun 2019, mr meowski wrote:
They finally ditched that stupid USB bridge chip - so USB3 comes from a PCIe bus and Gigabit is on its own. Just read https://blog.hackster.io/meet-the-new-raspberry-pi-4-model-b-9b4698c284 for a good overview.Yeah I can read chief! Gordon's had an actual pre-release unit for testing for a while though so I'm far more interested in any empirical data he cares to share than what the spec sheet says...
There's really nothing more that I can add to what Al has said there. I've not done any benchamrks on it other than a few iperfs on the Ethernet - and got ~990Mb/sec over it without doing anything too special. See Roy Longbottoms posts/pages for some real benchmarks.
If I compile my RTB BASIC interpreter on it using: make # get as much in the cache as possible make clean time make -j4 then I get: real 0m1.596s user 0m4.104s sys 0m0.360s on my i3 desktop, and: real 0m3.753s user 0m11.019s sys 0m2.175sOn the Pi v4. This is with a bog-standard SD card. Might be faster with a fast usb3 drive/SSD.
It will need a fan for anything more than casual use, although if you have a good heatsink and allow airlow over it, then you'll be OK too. See the Pimoroni fan shim and their heatsink cases for it. I have a 12v 40mm fan sitting over mine right now (powered off the 5v line - so it's virtually silent)
The 4GB model is good enough for casual work - youtube works fine in full HD (I dont have 4K monitors) the dual-screen works - triple screen (via the DSI port may work in the future)
So, just another small factor Linux system. Add USB3 drives and you have the makings of a nice little home NAS or media system.
DO get GOOD usbc power supply. Don't skimp on that bit. And remember, it's a power supply you need NOT a charger.
Gordon -- The Mailing List for the Devon & Cornwall LUG https://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq