askdrax wrote: ↑19 Mar 2021, 17:35
This is what I'm seeing with my Viper 8KHz @ 20,000DPI (was told max DPI gives lowest input latency XD) (Image attached)
Something pretty wonky going on no?
Resource competition patterning / external AC interference patterning (if it's cyclic at 60/120Hz in North America or 50Hz/100Hz in Europe).
You have two cyclic frequencies involved -- one looks like a fine frequency (~10-20ms cyclic pattern?) and the other looks like a coarse frequency (~250ms cyclic pattern?) which is weird.
Inteference/EMI: Like a bad computer power supply, bad mains, or mouse cables going too close to power wires and power bricks. Try reorganizing the wire mess behind your computer so that your data wires are far away from power wires/power bricks/power supplies/devices/gadgets (including monitors and routers). Inverse square law is your best friend -- even 6 to 12 inches apart helps a lot in wire management. And I've seen malfunctioning CPU fans/watercooler pumps create interference patterning sometimes too.
Resource competition/PC behaviours: Like traffic sharing with other USB devices, processing time, driver, etc. Try optimizing it out.
It could be either or both.
And if it's just resource behaviours:
At the coarse scale, it can be disk traffic or network traffic.
At the finer scale, it can be internal heavy resource sharing.
Have you tried
USB port lottery (tested each port), or a dedicated PCIe USB card, to bypass overloaded motherboard USB hubs (the rear plate full of USB ports)? A good PCIe USB card gives you a dedicated USB chip just for one mouse, and a more dedicated (or less heavily shared) PCIe lane to the CPU or chipset. Not always, but your odds at the USB lottery becomes better.
Some onboard USB are just not that good especially if WiFi/Bluetooth/USB/Ethernet/Audio/etc are sharing the same chipset and contending internally out of the wazoo (some devices are mapped as additional internal USB devices attached to the same "internal hub" that your 8KHz mouse is plugged into. And even if not, you might have a heavy amount of PCIe lane sharing with a resource-heavy device like a gigabit Internet connection)
If quick adjustments don't work (like making sure your USB wires are far away from power wires/power bricks) -- a Windows reinstall (or a temporary clean install on a separate partition) can help you diagnose if this is more resource competition related. Unplug all USB devices, all power bricks, all gadgets, even LED lamps, unplug all your RGBs, get them away from your computer temporarily -- And with just your PC, mouse, keyboard, offline, move away all extra gadgets/move away all spare power cables/move away all spare extra power bars/etc (except monitor, keyboard and mouse) and with a fresh windows install, work your devices back to your computer and reinstall more and more drivers/etc until you start seeing patterning (from software or from interference).
It's a PITA to troubleshoot this stuff.