The SNR levels are marginal, but have you ever got higher than 90Mbps? If not the most likely cause is your system only has a 100Mb network card, or the ethernet cable is only Cat 5 (it needs to be Cat 5E or better).
Just so you can confirm, I bought a Cat5E and now my speed is 379.41mbps down and 36.46. So if anyone in the future has an issue with speeds (wired), ensure you utilise a CAT 5E Ethernet cable or better. Thanks guys