[mythtv-users] new PC build that's MythTV compatible

[Stephen Worthington]

On Wed, 2 Dec 2020 10:21:58 +0800, you wrote:

>> On 2 Nov 2020, at 10:12 pm, Stephen Worthington <stephen_agent at jsw.gen.nz> wrote:
>> 
>>> A big improvement is all the new motherboards have M-2 slots that 
>>> support PCI3x4 NVMe 2280 SSD modules that support 3,500MB/s read speeds.
>> 
>> Actually, PCIe 4.0 is now available on the latest motherboard M.2
>> slots, and there are some PCIe 4.0 NVMe SSDs available.  At a price,
>> of course.  But the speeds are staggering.  This sort of thing in
>> combination with an up to date CPU would be really good for large
>> builds like kernels.  I have just updated my mother's MythTV box with
>> a decent Ryzen 3 system and matching NVMe SSD and the build time on
>> the TBS DVB-S2 drivers (a full V4L build) is less than a third of what
>> it takes on my MythTV box.  I am now planning upgrades for my systems,
>> as it is clearly worth doing now, even if you do not get high end
>> hardware.  But I am waiting to see what the local prices for the new
>> Ryzen releases will be before I decide - I really would like to be
>> able to get PCIe 4.0.  I think the planned release date is about 5th
>> Nov.
>
>My backend (nuc gen 8)
>
>/dev/nvme0n1p5:
> Timing cached reads:   20684 MB in  1.99 seconds = 10393.20 MB/sec
> Timing buffered disk reads: 8572 MB in  3.00 seconds = 2857.14 MB/sec

Ignore the cached reads - they come from RAM.  The buffered disk reads
look like an older SSD, probably PCIe 2.x - well less than half the
speed available on a PCIe 4.0 SSD.  Of course, I do not actually have
a real PCIe 4.0 SSD to get speeds from, so I am just going by the
specifications.