slowmo on 23 January 2010
| Lafiel said: @ slowmo ) I had it horizontal. My PS3 has almost no dust inside, but switching the thermal paste immediately made it as quiet as when it was new again. You have to take into consideration that the processors are facing downwards if you have it horizontal, so the thermal paste can sag in that position as well. |
The heatsink presses upward so it cannot sag downwards 
. The reason it sags when vertical is simply gravity doing its work on the paste when it softens under heat, this cannot happen horizontally.
By changing the standard paste you do immediately improve the transfer of heat, the downside is the paste you've used isn't as durable and will need replacing frequently by comparison. Every time you replace the paste on a PS3 you flex the board and risk damaging any potential weak solder balls on the GPU and CPU. This is why if you do change the thermal paste I recommend you use MX-2 or similar compound that will not denature and will provide consistant performance long term. AS5 does not do this!
