UT server letancy isue on 64 bit OS..

[spatieman]

so i tought, lets fire up the server on my 24/7 server that is running anyway
its a exact copy from a already running server that works with no isues at all.
exept that that machine is running Win XP 32 bit.

the os i use is Win 8 64 bit, 2 gb ram.
server starts fine, all stuff loaded, but when i join, i am stuck moving
if i am between 2 frames, i had this isue on my old 64 bit linux server to, but now i am using windows.
pings keep below 10ms, and i noticed that bots behaving the same, LAG, hopping forward and back.
Yes, i also tried lowering the maxclient rate in the tcpdriver section.

personaly i have the idea that it has to do with the gigabit connection, as far i know, it uses so called jumbopackets for managing the GB speed.
or it is a gigabit network isue, or is strugles with the 64bit os.

so, if anyone has a idea how to fix this, i dont have any spare 32bit machine with a 100Mbit nic in it.
and no, adding a 2nd nic is a no go, the machine is HP pro slimeline mini desktop machine.

update.
reading,reading,reading.

added the TF2 fix.
but..
Critical: appError called:
Critical: Can't bind to native class TF2.TickFix
Exit: Executing UObject::StaticShutdownAfterError
Critical: UClass::Bind
Critical: (Class TF2.TickFix)
Critical: ULinkerLoad::CreateExport
Critical: (TickFix 1130)
Critical: ULinkerLoad::Create
Critical: UObject::StaticLoadObject
Critical: (Core.Class TF2.TickFix NULL)
Critical: UObject::StaticLoadClass
Critical: ULevel::Listen
Critical: Listen
Critical: UGameEngine::LoadMap
Critical: LocalMapURL
Critical: UGameEngine::Browse
Critical: UGameEngine::Init
Critical: UServerCommandlet::Main
Exit: Exiting.

Seems this fix aint working on modern OS's
so it is a CPU throtling isue.