Aftermarket heatsink/fan for nForce 570.

[HONkUS]

I got a MSI K9N Platinum SLI (or so they say) and the thing doesnt have a fan on the northbridge, it doesnt even have a heatpipe all it has is a little blue heatsink. Anyway I was wondering if anyone knows of a low profile heatsink/fan that would help keep it cool without obstructing my pcix slots. and also im new to the whole pcix thing so I want to know if it matters which pcix16 slot I stick my graphics card into. My POS "SLI" mobo has a x16 slot and an x8 slot so it cant do true SLI and i was wondering if both slots are both capable of x16 but only one at a time. If I can use the lower slot for my vid card then I can put a HS/Fan the size of my head on there and wont have to worry about it obstructing anything