Your question is malformed.
You're operating under the assumption there is such a thing as hardware RAID, and the big lie the industry wont tell you, is that there is no such thing as hardware RAID.
Traditional RAID is a hold over from the past where hardware was not fast enough and software was not advanced enough to do the job, so a second dedicated computer was used to manage the RAID. This is what people call a "RAID card".
With hardware getting faster and OSes getting more advanced things like ZFS or BTRFS came along to take over the job.
Your chipset is no different, it has software on it that manages striping or mirroring your disks just like a "hardware" RAID card has software or ZFS or BTRFS.
Now the RAID cards people speak of do have advantages, they have read and write cache to improve performance and battery backup to protect from lost writes to the disk if there is a power loss. Similarly ZFS and BTRFS can have a cache disk (usually an SSD or NVMe) and just leave it to the controller on the write cache device to handle power loss protection.
Your setup however has none of that, so in that you could call it a less advanced RAID system. But it's still RAID, well RAID 0 is not RAID it's stripe, and RAID 1 is not RAID as such, it's a mirror.