1 ROUTER 2 PC SAME SERVER PING DIFFERENCE 15MS

[JayFanFMP]

The LAN ping staying under 1 ms while game ping and loss swap between the two PCs is a useful split: the path between the PCs looks fine, so the difference is happening on the way out to the game server (or in how each PC talks to the WAN).

A useful isolate order:

1. Bypass the router for one test. Put each PC directly on the WAN/modem, one at a time, and join the same server. If the ~15 ms gap and the swapping loss remain, it is not the router. If they disappear, look at the router (NAT table, per-port buffering, or any SQM/QoS).

2. Dual-ping while you reproduce it, on each PC: one to the gateway, one to a public address such as 1.1.1.1. Gateway-stable plus WAN-spiky means the queue is upstream of your LAN. Both rising on only one PC points at that PC’s NIC/stack.

3. An under-load bufferbloat test (Waveform) from each PC, wired, with the other PC idle. If one PC’s loaded latency is much worse, check that NIC (flow control, offloads, power saving) before swapping more hardware.

4. To test bufferbloat without relying on a website: saturate upload or download on one machine while the other continuously pings the gateway and 1.1.1.1. If the gateway stays around 1 ms and the public ping climbs, you have a WAN queue.