Lian Li PC-O7S Review
As the tempered glass side panel covers the entrirety of the case side, removing it gives fantastic access to the interior. The layout is essentially the same as with the other cases in this line, they just get more spread out as the case gets larger. The PC-O7S is actually designed to take not just the ATX motherboard, but also the SP-ATX and E-ATX boards, giving you a few options if you're not content with good old ATX. Being a slim case at only 148mm, it's not surprising to find that it will only take CPU coolers up to 85mm tall.
Unlike the PC-O5S which will only accept an SFX PSU, the PC-O7S will take a standard size PSU, up to 220mm long. The CPU is hung from the bracket which is located at the top of the case towards the front. Down in the bottom corner there's an HDD rack which will take up to 3x3.5" and 1.2.5" drives.
The key shaped holes that seem to pepper the bottom of the case are actually mounts for drives, allowing up to 3x3.5" or 3x2.5" drives to be mounted. It's down here, as we'll see later, that we also vertically mount the GPU. Again, it's worth noting that if you do decide to place drives here you're going to have to move the PCI bracket forward which in turn will lose you an expansion slot.
Looking up into the roof section we can see that there are three 120mm fans, each of which has a black metal grill attached to it. In total there's 60mm of depth up there, which isn't a great deal when you consider the overall size of this case.