Zalman ZM-NB47J & ASUS A8N-SLI temperatures?

[rauskis]

I guess this topic has already been discussed here somewhere but I wasn't able to find... =)

I just replaced A8N-SLI's original chipset fan with Zalmans ZM-NB47J sink. MB temperature was about 35C under normal load with original fan, now with Zalman MB temp raised to 39/40. Is is OK temp for northbridge? What kind of temps others are getting with Zalman ZM-NB47J?