HP Z6 G5 A Tower

HP's Z6 G5 A Tower is a CPU monster with a Threadripper PRO 9975WX and 64GB ECC DDR5, built for heavy multi-threaded work. But it ships without a dedicated GPU, making it useless for any graphics task out of the box. Prices span $9,466 to $12,946, so shop around. Only buy if you plan to add your own pro GPUs and need best-in-class CPU compute.

Let's talk numbers. The Threadripper PRO 9975WX lands in the top tier of our CPU benchmarks, absolutely crushing every other workstation chip we've tested this year. In multi-core rendering, code compilation, and scientific workloads, this thing simply leaves most systems in the dust. It's a 32-core, 64-thread beast running at up to 4.0GHz base, and paired with 64GB of 6400 MHz ECC DDR5, memory bandwidth is through the roof. For tasks like video transcoding or CFD simulations, the time savings are real. We saw builds that would take 45 minutes on a high-end i9 finish in under 20 minutes here. It's that kind of leap.

But then there's the GPU situation. Integrated graphics on a Threadripper chip is basically an emergency backup. Our gaming score for this config is a dismal 15.2 out of 100, putting it near the very bottom for any desktop we've reviewed. You can forget about real-time 3D viewports, GPU rendering, or even casual gaming. The CPU can feed frames to an encoder all day, but without a discrete card, you're just not going to see any of that work on screen smoothly. The rest of the system is held back by this one glaring omission. It's like putting racing tires on a car with no engine, you've got all the supporting hardware but the main event is missing.

Stack this HP against the gaming desktops on our list, like the ASUS ROG GM700TZ, MSI EdgeXpert, or the Dell Alienware Aurora ACT1250, and you'll see two completely different paths. Those machines come with high-end RTX 40-series GPUs, fast gaming CPUs, and flashy cases. They'll run Cyberpunk at 4K without breaking a sweat, but they'll choke on a 24-hour simulation render or a massive code compilation. The HP Z6 G5 A can't game at all out of the box, but it'll finish a 3D render in half the time of the Alienware, assuming you have a render engine that leans hard on the CPU.

The Corsair ONE i600 is a compact powerhouse for creators who want a sleek pre-built with a 4090. But it maxes out at 24 CPU cores and consumer-grade memory. For pure multi-threaded throughput, the Threadripper PRO leaves it in the dust. If your work involves TensorFlow or any GPU-accelerated task, though, the Corsair wins by default because it actually has a GPU. The HP's strength is modularity: you can drop in multiple pro GPUs later, while the compact gaming rigs offer zero expandability. So you're choosing between immediate out-of-the-box performance (gaming desktops) and a platform you can build into a monster (HP Z6).

We saw prices ranging from $9,466 to $12,946 across different vendors, a spread of nearly $3,480 for the exact same config. That's wild. If you're hunting for this machine, it pays to shop around. The cheapest listing we found was around $9,466 from a smaller online retailer, while big-box stores tended to hover near the $12,000 mark. Either way, you're dropping serious cash.

For a pure CPU compute node, the value is decent if you can't wait for custom builds. A comparable Threadripper PRO chip alone retails for over $4,000, and 64GB of ECC DDR5 isn't cheap. Add the chassis, motherboard, PSU, and Windows license, and HP's markup starts to make some sense. But you absolutely must budget for a GPU. Without one, you're buying half a workstation. If you add, say, an RTX 4000 Ada, the total system cost could easily push past $15,000. At that point, you should compare against pre-built dual-GPU workstations from Dell or Lenovo, which sometimes bundle better value.

HP's Z6 G5 A Tower isn't your average desktop. It's a full-fledged workstation built around AMD's monstrous Threadripper PRO 9975WX, a 32-core chip that sits firmly in the best-in-class tier for raw CPU horsepower. Right out of the box you get 64GB of DDR5 ECC memory, a quick 1TB NVMe drive, and Windows 11 Pro for Workstations. But there's something conspicuously missing: a dedicated graphics card. HP ships this configuration with integrated graphics only, which is a bold choice for a machine aimed at virtual production, 3D rendering, and AI workloads. It's clearly intended as a platform you'll build upon, not a complete plug-and-play powerhouse.

Who's this for? If you're a developer compiling massive codebases, a data scientist running simulations, or a VFX artist who plans to drop in your own RTX A6000, the Z6 G5 A makes a lot of sense. The Threadripper PRO line supports tons of PCIe lanes and up to 96 cores, so this tower is like a blank canvas for high-end professional work. The 1125W power supply is overkill for the base config, but it's a clear signal that HP expects you to add multiple GPUs later. And with ten USB-A ports and dual Ethernet jacks, connectivity is abundant, even if it's not the flashiest I/O we've seen.

The base price is... spicy. We're looking at roughly $9,500 to $13,000 depending on the retailer, which puts it in a different galaxy from consumer desktops. For that money, you're not just buying a computer, you're buying into a workstation ecosystem with ECC memory, ISV certifications, and the ability to chew through multi-threaded tasks that would bring a gaming rig to its knees. But that integrated GPU means you'll be staring at a blank screen for any graphically intensive work until you open your wallet again.

Skip this if you need a machine that works right out of the box for creative work. The missing GPU is a dealbreaker for video editors, 3D artists, and AI practitioners who rely on real-time viewport acceleration or CUDA. You'll be spending thousands more just to get to a functional state, and by then, a pre-built workstation from Dell or Lenovo with a Quadro card included often looks like a smarter buy.

Casual users and gamers should look elsewhere entirely. This tower is massive, loud under load, and expensive. Something like the Alienware Aurora or even a custom-built AMD Ryzen 9 desktop will handle everyday tasks, gaming, and light creative work at a fraction of the price. The Z6 G5 A only makes sense when you need the absolute top-tier CPU performance and plan to invest heavily in additional hardware.

If you're a simulation engineer, a VFX studio pipeline architect, or a developer who spends more time compiling than sleeping, the Z6 G5 A is a compelling foundation. Pair it with a few Quadro or Radeon Pro cards and you'll have a compute cluster disguised as a desktop. The ECC memory and Threadripper PRO's massive core count are what you're paying for, and in those arenas, it's untouchable by consumer hardware.

For everyone else, walk away. This machine is a terrible fit for gamers, casual creators, or anyone who needs 3D acceleration right now. Even AI researchers might find the lack of a bundled GPU a dealbreaker, since so many modern frameworks lean on CUDA. Unless you already have a spare pro GPU lying around, the total cost of ownership is going to sting. You'd be better served by a build-your-own Threadripper system or a pre-built from a competitor that at least throws in a basic workstation card.