Torrents - Writing speed? CPU?

2 days ago a found this -in my opinion - amazing firmware.
Took my old nswp1 out of the closet, and put the new firmware on it (first the 10, then updated till 15). Increadible easy... Overall improvement.
But... I am trying to download movies with Transmission. Forwarded the port trough te router, transmission also see the port is open.
Downloadspeed really low. Mostly starting at 750kb/s, but then dropping really fast till only 60kb/sec or even lower.
I can't find the problem... I think it has to do something with the writing speed of the harddrive.
I tried downloading with utorrent from my computer, en save the file to the nwsp1 shared folder.
Start speed is goed, up to 1.5mb/s, but dropping after a while to almost zero... Then few minutes after speed goes up again, then dropping again....
It's for sure not the torrent I was trying, cause if I download it to the harddrive of my laptop, it goes really fast. (up to 3MB/s).
Is it possible to help me improving my download speed with torrents? preferable trough transmission? Or the writing speed?
Btw: thank you for the really good firmware, it's really impressive!
Took my old nswp1 out of the closet, and put the new firmware on it (first the 10, then updated till 15). Increadible easy... Overall improvement.
But... I am trying to download movies with Transmission. Forwarded the port trough te router, transmission also see the port is open.
Downloadspeed really low. Mostly starting at 750kb/s, but then dropping really fast till only 60kb/sec or even lower.
I can't find the problem... I think it has to do something with the writing speed of the harddrive.
I tried downloading with utorrent from my computer, en save the file to the nwsp1 shared folder.
Start speed is goed, up to 1.5mb/s, but dropping after a while to almost zero... Then few minutes after speed goes up again, then dropping again....
It's for sure not the torrent I was trying, cause if I download it to the harddrive of my laptop, it goes really fast. (up to 3MB/s).
Is it possible to help me improving my download speed with torrents? preferable trough transmission? Or the writing speed?
Btw: thank you for the really good firmware, it's really impressive!