Any suggestions for a GPU?  I might do some shopping.  :-)

It's pretty much stock.  I just opened up the bandwidth.  The thing is, I just don't see either the CPU or GPU making much of an effort.  The numbers are low.

[server]
port = 9002
host = "0.0.0.0"
html_root = "frontend/dist/"
otherusers = 1
threads = 1

[websdr]
register_online = false
name = "the NEW K3FEF NovaSDR RX888mk2 in Milford PA USA"
antenna = "ZS6BKW"
grid_locator = "FN21mh"
hostname = "NovaSDR.k3fef.com"
operator = "K3FEF"
email = "K3FEF@ARRL.NET"
callsign_lookup_url = "https://www.qrz.com/db/K3FEF"
chat_enabled = true

[limits]
audio = 100
waterfall = 200
events = 200

[input]
# Core parameters (REAL/direct sampling)
sps = 60000000                # 6 Msps to start; scale carefully
frequency = 0          # Center/base frequency (Hz) for real sampling
signal = "real"              # RX888 MK2 direct sampling (real)

# Performance and quality
fft_size = 131072            # 131072 Reduce if OOM or high CPU (e.g., 65536)
fft_threads = 1
brightness_offset = 0
audio_sps = 20000
waterfall_size = 1024
waterfall_compression = "zstd"
audio_compression = "flac"
accelerator = "opencl"         # Keep "none" on Raspberry Pi; use others only if compiled and supported
smeter_offset = 0

[input.driver]
name = "stdin"
format = "s16"               # rx888_stream outputs s16 (real)

[input.defaults]
frequency = 3875000
modulation = "AM"           # AM | SAM | FM | WBFM | USB | LSB

Can you post the TOML you are using? As wrong settings make it work badly too.

Don't you have an more modern Intel CPU gen6 or newer with GPU? As those work very well with OpenCL.

I tried AMD GPU's myself, never got it to work at all.

But it could be wel your Toml settings that are wrong.

Beware the Ubuntu Desktop users the GPU too, it may not like your OpenCL use at the same time.

Hi all!
I've been hosting the K3FEF.com websdr since about 2016, and quite frankly I'm just SO done with it.  So Phil has been helping me get things going with Phantom/Nova SDR.  I am NOT a linux guy by any means.  I run a big tech shop but we're all windows with Cisco infrastructure.  I don't think we'd even be allowed to use Linux with what we do.  But that's besides the point.
I have things somewhat running.
I have two machine choices:  An old 2012 Dell Precision 1650 tower w/ 24GB of ram, a 250GB SSD, a Radeon RX580, and an add-on USB3 card that can do 2 amps of juice into the RX888 mkII.  That's what I'm primarily focused on right now. It's running Ubuntu 22 desktop.  Overall it's not bad, but the waterfall seems grainy, and the audio is "skippy" - almost rythmic but in a bad way.

You can listen in on www.k3fef.com:9002.

It took me quite a lot of work to get the RX580 GPU going.  I found that the AMD driver alone did not work.  I had to do the full ROCm install as suggested on the AMD website.  THEN I started to see the GPU get busy (using AMDGPU_top).  So right now, CPU is very low (7-10%), and GPU is running 50-70%.
Per Phil's advice, I added some USB buffer in the rc.local file:
sh -c 'echo 1000 > /sys/module/usbcore/parameters/usbfs_memory_mb'
(That did seem to help a bit).
Overall, the machine doesn't seem to be breaking a sweat - so I'm not sure why it's not running perfect.
Also, when zoomed in the waterfall, can I get some more resolution without killing the system?
Keep in mind, it's an old i7 CPU, but it seems the GPU is doing the bulk of the work anyway right now.

I have another good candidate - also 2012.  It's a Mac Pro 5.1 w/ dual CPU & 12 cores each for a total of 24 cores.  It was my old studio machine.  I have both the factory Radeon card, and another RX580 I could put in there.  The machine is a tank.  It's running linux Mint.  Problem with that is that it doesn't do USB3 so I'm waiting on a PCIe card I can stick in there to test that machine and see how it does (or doesn't LOL).

My biggest PITA, is that whenever I kill RX888_Stream, the desktop just hangs.  The machine is still running and I can get in via SSH, but nothing on the desktop responds.  It's WEIRD!  I have to do a full reboot to get it going again.  That's challenging because I want the system to be stable enough to start back up on it's own (we have a lot of power issues here because I'm in a rural area).

So... I know that's a lot of info, but I'm looking for any feedback, tips, advice, free pizza...etc.

FWIW, I am SO appreciative for the work you guys put into this.  I remember getting my first RX888 years ago and it was sort of disappointing.  I feel like I'm so much further along thanks to the efforts you all have made. :-)

Let me know if any screenshots or info would help - I'm happy to paste whatever might help.
I would also happily pay somebody to remote in tweak as needed.  I've been fortunate to get a lot of nice donations from WebSDR listeners, and it would only make sense to pay-it-forward to provide a "better product". :-)

73!!
Michael - K3FEF

Hi all,

Welcome to the forum.
We are here to help, please keep it nice and pollite.

Bas ON5HB.