I'm wondering if there are any updated products to resolve this sort of issue. I'm wondering what single slot Nvidia products are out there (now and in the past), and so far online resellers don't provide that category as an option in their searches, so its a bit like looking for a needle in a haystack.
I would guess HTPC owners as well as those trying to leverage every last drop of CUDA power out of a system would like to know the answer to the question, so any further suggestions would be helpful.
I'll ante in with the suitability (alleged, since I don't own one) of the single slot GeForce GT 430, although there is no guarantee that other companies won't slap a larger cooler on it for some or all models. http://hewreck.com/nvidia-unleash-geforce-gt-430-single-slot-cooler/
Is there anything else out there that has equal or better performance in a single slot, past or present? I think so far we have 9600GT and 8800GT/9800GT. I don't find any single slot GTX 240's or 250's (were there any?), but I still find some for GTS 250's (up to 1GB of memory) but the fans seem to stick out quite a bit.