I'm compelled to reply. Unlike your radio my RSP2 is not a clone. Assembled in Asia from designs and a BOM of specific components is a little different than a copied device that resembles the original. Just look at the numerous NanoVNA versions out there. They look the same, but work the same they don't. And thinking that they have an original, they brick them doing a simple firmware upgrade.
Do you look at your task manager while you're using the radio to check for CPU or memory spikes? And it's mentioned over and over that you need an adequate USB power bus to operate your radio.....again mentioned all over.....to keep the radio from crashing software.
You didn't mention the PC you're using and its hardware resources. Or if the OS is old and "tired".
And the GPU. Offloading tasks to something like Nvidia graphics compared to Intel Integrated Graphics works wonders.
An example. I have a CPU intensive application that performs, lets say, 32,000 operation/sec. using the CPU setting.
Switch it over the the Nvidia card to run the same application and it zips along at 240,000,000 ops/sec.
A reinstall works wonders for many having issues on old, used, balky systems.
SDR-Console. Have you tried that? Simon is always on top of things.
Hey, SDRPlay makes higher res SDR's. I just happen to use mine that I've had for 3 years now. Good enough for me currently.
And it happens to to suit my frequency ranges fine.
In WIndows, VB-Cable does take a little getting familiar with. Getting your audio settings matched up and such takes a little time.
Understanding what's going on and how to fix it when things don't play right is just a learning process.
Keep at it. I'm sure you'll get what works for you working smoothly eventually. Troubleshoot a little before you blame it on junk.
Even though the word "Clone" raises a red flag every time for me.
Good Luck!
Nor is my RX888 a clone, but just like your RSP2 it definitely is assembled with Chinese parts.
Yes, I do have the original NanoVNA-H4 that is not a clone,,'also made with Chinese parts'.
My puter is a 20 month old Dell, core i5 1.8 Ghz, 8 GB ram, running Win10. A fully compliant USB3 port.
The overhead on cpu power comes from the software that does the DSP. that takes a lot of resource.
HDSDR will peak at 80%.
The problem is NOT hardware related according to the folks that put out the RX888 and the drivers.
I am not the only one with similar issues and the originators are looking into the problem.
'Again' HDSDR never has worked to my satisfaction, I uninstalled it a few years back for similar reasons.
and that was with an older airspy and rtl-sdr dongls. no problems with SDR# or SDRconsole, works fine.
I will be testing on a newer version of SDR# and hope I don't go bad to worse for the work.
Hey, where do you get SDRplay makes higher res devices. I compared and don't see that.
Hey, I have been troubleshooting SDR since mid 80s so likely a pro at it.
I turned an old VHF Delta SX into SDR.
Now if what you are using fills your bill then run with it. I am the sort (stubborn) who works a problem to solution, so I will work this out, Just like the Delta(that took a year) just hoping to get some help so this doesn't take a year. I don't often need help, but you never get it without asking.
