Hi,
Apologies in advance if I'm being dense here, I just "upgraded" to the DIR-882 primarily for my wired home network, when I connect my PC directly to my ISP modem I'm getting 800-900 Mbps up/down, when I connect via the router I'm getting 150Mbps up/down, I don't understand why? Please help!

Here's speedtest.net screengrabs:
ISP Modem:

DIR-882:

I updated to the latest firmware (1.04) and I went into QOS and set the speeds as 1000/1000 with my ethernet getting the highest (only device connected anyway).