I had ordered this for HP laptop, but it doesn't recognize the Mini-PCI Adapter 300Mbps by TP-LINK.
So I thought I remember seeing that DIR-655 uses Mini-PCI which it does. So I open it up and found this:
I found that the PC board is DIR-855 and DGL-4500 design.
Install with TP-LINK 300Mbps Mini-PCI WNPU
Working with Card installed (Close-up)
Now turns into DIR-825, (in theory NPU still the same 275MHz and not the 350MHz NPU in 825) This card doesn't have 3 connectors I only needed 2 connectors for the laptop. I've tested the signal on the laptop it's actual better it's coming in a -49dB instead of the prior which was -54dB the lower the number the better.
Firmware 1.21B11_beta02
A3 Hardware
DIR-655
Extra USB2.0 4-port Hub
TP-LINK Wireless N 2T2R MIMO instead of 3T3R MIMO
20dB Max Wireless Transmit Power