Per il dissipatore potresti comperare questo:
un artic cooling silencer per geforce 6600GT
Fan: 72 mm
Overall Dimensions: 218.5 x 100 x 38 mm
Rated Fan Speed: 1500 RPM
Bearing: ARCTIC Ceramic Bearing
Noise Level: 0.3 Sone
Weight: 243 g
**Easier Installation
New clip and back plate design for better fit.
**Exhanced Compatibility
New fan casing design to enhance compatibility.
**Clicking Noise Solution
A filter is integrated into the PCB to reduce the noise generated from the motor.
Extremely quiet
A large fan and optimized fanblades offer a minimum noise level at a high air flow.
Unique Cooling Performance
Highest fin surface area and a 2.5 mm thick copper base achieve best cooling performance at its noise level.
High Service Life (L10 at 30°C: 274000h)
Our ARCTIC Ceramic Bearing (alloy bearing and Ceramic shaft) provides our fans with an outstanding service life.
6 Years Warranty
DHES (Direct Heat Exhaust System)
The DHES draws cool air from inside the case and exhausts warm
air outwards. This prevents the fan from recycling warm air to cool the
GPU, which increases cooling performance.
Further the DHES lowers the air temperature inside the case, because the heat
of the GPU will be carried out directly.
Easy Installation
Noise Level
All measurements are taken using full fan speed.
The noise level is measured in Sone (loudness) instead of dB (sound pressure).
The loudness depends upon ears response curves and tells you exactly, how bothering a certain noise is. Sone takes the frequency and bandwidth of a sound into account.
A doubling of the number of Sones sounds to the human ear like a doubling of the loudness.
The comparison of products from different manufacturers is basically impossible, since all manufacturers measure in different ways. Even a rough translation from Sone to dB doesn't help. A 15dB cooler can be louder than a 1 Sone cooler from another manufacturer.
Nevertheless with the Sone data you can compare our coolers between each other and get a quite precise idea how annoying the product will be.
1 Sone: nearly inaudible in a computer case
2 Sones: clearly audible
3 Sones and more: disturbing
Per vedere se compatibile con la versione AGP fai un confronto tra la tua scheda e questo schema 
