
Seasonic has shared a press release for the ARCH Q503 PC Chassis, the latest mid-tower ATX case from the popular power supply manufacturer to support its CONNECT technologies for a cleaner interior. The case follows in the footsteps of the previously released SYNCRO Q70 with an integrated CONNECT 80 PLUS Gold power supply with fan control button and backplane module, the latter of which serves as a cable management hub that supports shorter cables for reduced cable clutter. Other, more typical features of the case include a sturdy steel body, tempered glass panels on both sides, and three pre-installed fans. Seasonic’s ARCH Q503 PC Chassis is now available in 750-watt and 650-watt options for $339 and $319, respectively.
ARCH Q503 Specifications
| Case Specifications | ||
| Dimensions (D x W x H) | 448 mm (D) x 215 mm (W) x 482 mm (H) | |
| Form Factor | Mid Tower | |
| Materials | Steel, Plastic | |
| Side Panel Type | 4 mm Tempered Glass Side Panel | |
| Compatibility and Clearances | ||
| Mainboard Support | Extended ATX, ATX, Micro ATX, ITX | |
| Maximum Motherboard Size | 305 mm x 277 mm | |
| Maximum PSU Length | 230 mm | |
| Maximum CPU Cooler Height | 165 mm | |
| Maximum GPU Length | 380 mm | |
| Access and Control | ||
| Power | 1 | |
| Reset | 1 | |
| USB 3.0 | 2 | |
| HD Audio IN | 1 | |
| HD Audio OUT | 1 | |
| USB 3.1 Gen 2 Type-C | 1 | |
| PCIe and Slots Drive Bays | ||
| PCIe Slots | 7 | |
| 3.5″ HDD Bays* | 3 | |
| 2.5″ SSD Brackets | 3 | |
| Fan Capacity | 120 mm | 140 mm |
| Front | 3 | 2 |
| Top | 2 | 2 |
| PSU Shroud | 2 | 0 |
| Rear | 1 | |
| Dust Filter | Top / Bottom | |
| Radiator Capacity | ||
| Front | Up to 360 mm | |
| Top | Up to 280 mm | |
| Rear | Up to 120 mm | |
| Parts and Accessories | ||
| Fans Included | 2 x 120mm Fans in Front, 1 x 120mm Fan in Rear | |
| Seasonic CONNECT | 1 (80PLUS Gold 750 W or 650 W) | |
| 3-to-1 PWM fan splitter (pre-installed) | 0 | |
| 3.5″ HDD Drive Bays* | 0 | |
| 2.5″ SSD Brackets | 1 | |
| Removable Dust Filters | 2 | |
| Cable Management Cover | 0 | |
| PSU Shroud | 0 | |
| Motherboard and 2.5″ SSD Screws | 17 | |
| Motherboard Standoff | 8 | |
| 3.5″ HDD Screws | 8 | |
| Power Supply Screws | 6 | |
| Reverse Fan Screws | 0 | |
| Cable Tie | 8 | |
| User Manual | 1 | |
| Fabric Gloves (Pair) | 0 | |
| Soft Cloth | 0 | |
| Warranty | ||
| ARCH Q503 | 2 Years |
The Seasonic ARCH Series creates an interplay and connection between two important pillars or product development; the early versions of the CONNECT Module and the Seasonic SYNCRO Q70 Case. Timeless appearance, modern design, and user-friendly functions make this case a logical choice for users, who want easy assembly and hassle-free cable management with the Seasonic CONNECT. There are ample options for cooling and storage possibilities in this versatile case that was built to last.
Source: Seasonic

Discussion (6 replies)
Join Discussion →I wanted a connect setup but the max wattage was too low and size too small.
Too big for me. 5cm longer than my current case. I only can spare about 2cm.
Plus I already have a 1200W Seasonic, with 10yr warranty. 2yr is a joke for a top end PSU.
For most people, 650-750W is still going to be plenty. Not everyone is rocking overclocked 16 core CPUs and top-tier GPUs. I'd go out on a limb and say 95% of all gaming PC's would fit comfortably in that wattage envelope (based on Steam Hardware Survey).
That said, 2 yr warranty is a bit low. I can kind of understand since this is a case, but it has an integrated PSU, and there isn't any mention of a separate warranty to cover that. On the other hand, it's Seasonic, and if there is still a PSU company out there to trust, this one is our last hope - and the only thing better than having a warranty is not needing the warranty.
Steam survey tends to tend toward older games and systems, and in that context I absolutely agree.
Thing is, you have to drop down more than two tiers from 'top' for consumer parts running current AAA games (well, with AAA graphics) before ~650W becomes comfortable, speaking from recent experience.
I once ran an overclocked i7 and two higher-end GPUs on 650W; I now recommend no less than 1000W for an i7 / R7 and one higher-end GPU. Granted the only reasoning behind skipping 850W is that the pricing is so close. If one wants to go actually high-end, 1200W doesn't sound ridiculous these days.
In naming convention yes. In price or performance - not so much. I'll give everyone that price tiers have been obliterated. You can still build an extremely capable gaming rig inside of a 650W budget. You aren't getting a 3090Ti in there, but ... a 3070 roughly matches a 2080Ti in most games, if I'm not mistaken, and is a bit lighter on the power budget.
The naming convention was severely wounded with the 2000 series, and was killed a painful death when the 3090 replaced Titan. You can't really compare "tiers" by name of the 3000 series to anything that came before it.
Especially if top tier is going to run $2k, and second from top near 1k... then I think most people are still going to build in that $200-$500 range.
Very disappointing coming from Seasonic.
True.