Hi
Some results as a continuancy to my earlier post of changing the grafic cooler to the after market Musashi.
Earlier I hadn't any temp values to compare with.Below I compare them Stock vice Musashi.
Secondly diagrams with temp readouts after some modding of the cooling and a couple of pics.

1/Stock vice Musashi. 2/After a little modding. 3/Load-Idle with temps.

Pics speaks for themselves.The musashi has better temps over all when comparing to the stock cooler even though I have the HIS 4890 Turbo card.
The temps are good and the "noise" level is tremendoesly low only the sound of a air breeze.This also when playing games, in my case the Call of Pripiat [COP], 100% load on grafic and 900/1000MHz and 1440x900.
Wouldn't Y agree after checking out above.Not to mention when not gaming......
EDIT:
<<<<<OBS>>>>> From Scythe Musashi product site:
With HD 4890 *¹==*¹ It is recommended to use the heatsink-plate coming with the original cooler to cool the VR/MosFET
EDIT 3/31/2010:LINK:
Changed fans to SY1025SL12M >>2 x 72m3/h.
Official Scythe Forum - AiAiAi's Album: Musashi with 100x25mm Kaze Jyu fan SY1025SL12M
Probably as low temps possible to be achieved.For Me anyway.

Hard to beat Laws of nature.