I recently replaced an i7 computer I bought new 6 years ago with a new
Lenovo Legion T5 Tower Gaming Desktop Computer – AMD Ryzen 9 7950X 16-Core 4.50 GHz Processor, 64GB DDR5 RAM, 2TB NVMe SSD, GeForce RTX 3060 12GB GDDR6, Windows 11 Pro that I got on Amazon.
After setting it up to also be my daily driver computer, I did a test. Stacking WBPP in PixInsight, 10 hours of OSC shots of the Lion Nebula I shot months ago, 250 mm (RedCat 51 with ZWO ASI2600MC). Used highest settings in WBPP.
On the new Lenovo Legion T5 the WBPP stacking took 1 hour 40 min.
On the old computer, it took 7 hours
Also with this better graphics card, using BlurX, StarX, and NoiseX went from minutes to seconds. (I inserted this line;
https://www.rc-astro.com/TensorFlow/PixInsight/GPU/
into PixInsight PixInsight Resources / Updates / Manage Updates and it automatically configured everything)
I highly recommend this computer.
Here’s the Lion Neb after stacking, processing, star reduction, and output: 
