There's a server link on the REMake GameCube page.

Am I missing something? Is there some other program I'm supposed to have? I dropped the the .dll and JOSN files into the game folder (Steam\steamapps\common\Resident Evil Biohazard HD REMASTER) and my game won't open at all. Opens just fine if I remove them.

I've been using Stainless' Automatic Door Skip Mod, but I heard this one was faster, however I can't even launch the game now.

Edit: Oh I guess it's just current broken. Found my way to the speedrun server and saw some saying it isn't working since the update.

Was having a similar issue myself. Games had been running fine, but suddenly game was running slowing with Clock Throttle. Audio Sync seemed to fix it, but would still get some slowdown now and then. I noticed Game Speed somehow was changed to 75% for me so I changed it back to 100%. Runs smooth again now under Clock Throttle.