Part 1 — Reviving a Big Case

The Thermaltake Overseer had housed my gaming system for a long time: an Intel Core 2 Duo E8500, an ASUS Striker Formula motherboard, and two GeForce GTS 450s running in SLI.

As time passed, its graphical power became smaller and smaller compared with even relatively cheap modern hardware. But what became especially difficult to justify was the volume of space occupied by the Overseer itself.

One day, while walking past the case, I started thinking: What can I do with it that would actually justify its size and make use of its strengths?

The Overseer is a large case. It can accommodate 200 mm fans at the front and side, while the top has mounting positions for either two 200 mm fans or three 120 mm fans. It also has a built-in docking station for both 3.5-inch and 2.5-inch drives.

I didn’t want to turn it into another showcase PC. I wanted to build something that could serve a purpose and become genuinely useful in daily work.

Large cases like this were once strongly associated with SLI and CrossFire systems. Multiple graphics cards were installed primarily to combine their graphical power. But for practical computing, that idea has long been abandoned. Modern systems can provide far more performance in a fraction of the space, and there are even mini PCs today with workstation-class components.

So simply putting a powerful workstation inside the Overseer still wouldn’t justify its volume.

I needed to use what the Overseer was actually good at:

Lots of cooling, many 3.5-inch and 5.25-inch bays, enormous internal space, and plenty of room for expansion.

That became the main principle of the build:

Use whatever the Overseer can offer, and use it to its limits.

Every expansion slot and every drive bay should be populated — but not simply for the sake of filling them. Everything should have a meaningful purpose. The idea was to take a relatively old platform and revive it into something that could still be useful today.

Starting With X79

I already had an ASUS P9X79 motherboard lying around. I had originally planned to use it as the basis of an engineering workstation, especially because of its eight DDR3 memory slots.

DDR3 is obviously not fast by today’s standards, but memory speed isn’t the most important factor in many of my workflows. Some of them need capacity more than speed.

I already had 8 × 8 GB of DDR3, collected over several years when memory was available very cheaply compared with today’s prices.

I had also recently acquired a Xeon E5-2680 v2 for approximately the price of a coffee.

The X79 platform was therefore a natural starting point.

I’ve always had a particular interest in HEDT platforms such as X79, X99 and X299. Their quad-channel memory architecture, numerous memory slots and generous number of PCIe lanes make them very different from the increasingly constrained mainstream platforms that followed.

Once the idea of an engineering workstation emerged, a workstation GPU was the obvious choice. A Quadro would be suitable for CAD work.

But again, that wasn’t enough.

A Quadro, a Xeon and lots of RAM would make a perfectly reasonable workstation — but it still wouldn’t explain why I needed something as physically enormous as the Overseer.

The answer was to stop thinking of the machine as a conventional workstation.

Multiple GPUs, But Not SLI

The old SLI concept wasn’t particularly interesting to me anymore. Instead of trying to merge the graphical power of multiple GPUs, I wondered whether multiple GPUs could be useful simply because each one could provide a different capability.

The P9X79 had enough PCIe connectivity to make this practical.

The first GPU was an NVIDIA Quadro, intended primarily for CAD work.

I also use engineering software such as MATLAB and COMSOL, where having a GPU with CUDA support can be useful. For this role, an RTX 3060 offered a good balance between CUDA capability, 3D performance and power consumption.

So the second GPU was added.

The result wasn’t an SLI system. The two GPUs had different jobs.

That distinction became important to the whole philosophy of the build: expansion doesn’t have to mean redundancy. Different hardware can coexist because each component contributes something different.

Using the Space

If the machine was going to become a daily worker, an NVMe SSD was an obvious modernization.

The problem was that the P9X79 predates NVMe and only provides SATA connectivity. So rather than abandoning the platform, I added a PCIe-to-NVMe adapter.

The same approach was used for networking. The motherboard’s legacy connectivity wasn’t something I needed to accept simply because the platform was old, so a 2.5 GbE network adapter was added.

For the remaining legacy storage and optical hardware, I used a four-port SATA controller in one of the legacy PCI slots. This could handle the optical drives as well as the eSATA and docking-station connections.

The 5.25-inch bays were particularly useful because there was enough physical space to give each device a real purpose.

There is a Blu-ray drive and a DVD writer.

Two other bay-mounted devices are more unusual.

One is a six-channel SATA power switch with six physical buttons. The other is a unit with two 2.5-inch SATA drive docks.

Those external SATA docks became one of my favorite aspects of the build.

They allow an SSD to remain partially outside the case, and when used with SSDs they strangely remind me of old Atari cartridges. More importantly, they provide a very practical way of handling multiple operating systems.

Instead of installing every operating system on the same disk and building an elaborate boot configuration, I can have one SSD for each operating system and simply plug in whichever one I want to boot.

It is an extremely old-fashioned idea applied to modern solid-state storage — and in a machine like this, it makes perfect sense.

Storage When Needed

Inside the case there is space for six 3.5-inch drives.

Rather than leaving all of them running continuously, I connected three mechanical drives — 1 TB or 2 TB drives — through the six-channel SATA power switch.

Each drive can therefore be powered only when it is actually needed.

Again, the enormous internal volume of the Overseer becomes useful rather than merely decorative.

Cooling the Volume

And then there is the thing the Overseer does particularly well:

cooling.

The large front and side 200 mm fans already provide a substantial amount of airflow.

But I wanted to take advantage of the available cooling capacity rather than simply relying on the case’s original configuration.

A SilverStone 120 mm exhaust fan was added at the rear, alongside the fans of a 240 mm SilverStone all-in-one liquid cooler mounted at the top.

The result is a machine where cooling isn’t an afterthought. The large case volume, large intake fans, top radiator and additional exhaust all become part of the reason for keeping the Overseer around.

And this is where the original question finally started to make sense.

I wasn’t trying to build the fastest workstation possible.

I was trying to build a computer that could justify being this big.

Every PCIe slot, every drive bay, every cooling position and every unusual feature of the case had an opportunity to become useful.

The Overseer wasn’t being preserved as a museum piece.