Noisy Ethernet Card

[waternut]

Hi guys, recently i have bought a buffalo wireless router for my wireless connection between two home PC to share internet connections. One is connected to an adapter, another one is wired by cable. Everything works fine except that that etehrnet card from the PC which is connected by cable makes a constant chattering noise. Any idea what is the problem? Is it the etehrnet card is faulty?

[FastLearner]

Make sure it is screwed in tightly, if it is being held in by screws. Other than that, if it's working I wouldn't worry about it too much.