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Re: [LUG] Raspberry Pi v4


On 25/06/2019 16:22, Paul Sutton wrote:
> On 25/06/2019 13:31, Gordon Henderson wrote:
>> 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    0m2.175s
>> On 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
> Hi Gordon
> If you're coming to the next Tech Jam on the 6th July can you bring this
> with you, so we can have a closer look please :)

Sorry that should be 13th July,


> Paul
Paul Sutton
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