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TSB82AA2B (Link)应该是搭配TSB81BA3(PHY), 而TSB83AA23是集成Link 和PHY,他们都支持1394A和B,理论上性能不会有很大的差异。
请问下你是怎么测速度的, 是通过外设读写来测得吗? 读与写的速度应该会有差异。另外你测试的设备也支持1394B吗?