So I just finished a custom cooler job on my Palit GTX 460 (non reference), which involved some RAM sinks, a 1850RPM gently typhoon, and 4 cable ties.
Yup, I took off the (awful - load and crap) palit fan and shroud, and cable tied the 120mm GT to the heatsink. I also re-did the thermal paste, using AS5. I put some RAM sinks on the RAM that I could - they wouldn't fit under the heatsink though, so some remain bare. The card is sitting in a BitFenix Colossus with plenty of airflow, including a Nocuta Nf-B9 that blows towards the GPU - its actually cable tied to the HDD rack
The results? Before, temperatures were in the 80s (850/1600, 2000). Now, they are in the 60s. Crysis / Crysis Warhead doesn't reach 70 degrees. Anno maxes out at ~75 after a long session. Everything else tends to be in the 60s. Fantastic results, given how quiet the GT is.
I have 2 other GTs in my case, and all (including the GPU one) are hooked up to fan controllers - the GPU one to the Colossus' controller, and the others to an NZXT Sentry 2. This custom job has removed the awful noise - when I'm not gaming, the PC is near silent. When gaming, its quiet. Much, much, much quieter than before, when the Palit fan was like a jet engine.
All in, this job cost me ~Â£15. So much cheaper than any aftermarket heatsink, and it works for non reference PCB cards. I'd recommend it to everyone
Just my 2 cents