HT does not work well with UD as LigandFit requires the FPU all the time and there is still only one to share between the 2 running UD processes (if you use the various methods mentioned here or elsewhere). HT will work if you need to share the processing between integer and FPU activities but not if both processes require integer or FPU only.

If your primary goal is crunching then turn off HT as it gives you very little benefit anyway. In some cases HT will actually slow things down because the instruction & data caches are split between both logical processors. HT only benefits if you run SMP capable apps all the time (like some graphics rendering apps etc) which you probably don't if you only have one processor.

Having a processor intensive task then effectively halving the available processor resources will only have one obvious result. You will be better off in the long run by turning off HT and overclocking the processor.

Cheers

Orbi

Inderdaad 2 clients draaien onder aparte inlogaccounts.
Bij elke account moet je de affinity van de koe via de taskmanager op 1 en dezelfde cpu zetten.
Dus: guest1 -> alles op cpu0, bij guest2 -> alles op cpu1.
Vergeet NIET om ud.exe op compatibilitymode NT4 te zetten. (B.v. via Verkenner, rechtermuis-klik op ud.exe, dan naar eigenschappen, compat.mode, en dan NT kiezen.)
Zo draai ik ook al bijna 5 jaar onafgebroken mijn kudde

Enig probleempje is dat bij herstarten van de pc (of na uitloggen van het account) je alles opnieuw kan instellen
Mijn advies is dus: NIET MEER UITZETTEN

ok here goes:
WinXP allows Switching of users without closing another users programs. Its called "Fast User Switching"

As mentioned later in the thread, being on a domain disables Fast User Switching.
Next.. i have two accounts on the machine.

Account #1:
Install UD in Directory A
Run UD
Set Affinty to CPU 1

Switch Users

Account #2:
Install UD in Directory B
set Compatibility Mode to NT 4 (Service Pack 5) <--- THIS IS HOW I GOT IT TO WORK *Important*
Run UD
Set Affinity to CPU 0

From there it will work. Check Taskmanager to make sure both processors are being used.