However.. When running benchmarks with both the Samsung Magician and ATTO benchmarks, it appears as if I'm getting SATA 3Gbps speeds:
Also, this SSD is running in AHCI mode.. The Samsung Magician software even clearly says "Your SSD will not deliver maximum performance because your system does not support a SATA 6 gb/s (SATA3) port."
I guess I'm just flat out confused, the HM77 chipset says it features SATA3, but my SSD is not getting the advertised speed and the included benchmarking software states my machine is not SATA3 capable.
I'm going to jump off the deep end here but I think it how they built the laptop that the issue not the Ssd. You may want talk to product engineer or a level three tech support. If reading the setup is right on there vendor web page I think what they did is wired the Sata ports to the slower speed thinking people would put a larger or faster Ssd as a cache drive and wired the faster port to to pci Ssd.
...it appears as if I'm getting SATA 3Gbps speeds...
...The Samsung Magician software even clearly says "Your SSD will not deliver maximum performance because your system does not support a SATA 6 gb/s (SATA3) port."...
you've answered your own question. you're not getting sataIII speeds because your system only supports sataII.
Jut because the FULL chipset says it supports it, doesn't mean the no-so-well-known-laptop company, didn't use the FULL chip specs. They might have used a different controller chip for the SATA on the motherboard and doesn't use the chipset SATA at all.