I’ve got a fairly simple particles setup, and the viewport looks as I would expect it to, but on render, its as though the timings/rates are compleley different.
I’ve got Display set to 100% so no reason for the viewport preview not to match the render…or is there an option I’m missing?
Please help! 
ARRGH… only after I post do I notice the parameters in the PF Source in the modifier panel!
doh!
lol i take it you found the PF settings for viewport and render samples?
Lele
I can’t tell you the number of times I find the solution to a problem THE VERY MINUTE I hit the submit button on a forum!
its spooky… :x
I had the same problem and i keep thinking “integration step” doesnt give a clue about the system rendering it half speed…it should be the same, but with greater accuracy in the internal calculations…like reactor maybe…but im not a particle engineer 
Imagine you are modelling conan the barbarian and have turbosmooth OFF in viewport and say a couple iterations in render. Then, you hit render and scarlett johansson appears…
eheh, i hear ya
I tendentially turn around and start explaining my GF (while she’s busy studying, or working, paying me NO attention whatsoever) my scripting issues.
She stares blankly at me, for a couple of seconds, mentions my whacky backy issues with a slight dose of sarchasm, and i invariably start jumping of joy as i found the solution :lol:
Lele
Imagine you are modelling conan the barbarian and have turbosmooth OFF in viewport and say a couple iterations in render. Then, you hit render and scarlett johansson appears…
If that happened, I dont think I’d be too upset. 
Agreed :lol:
you got issues lele?