Image: Seasonic

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 FactorMid Tower 
MaterialsSteel, Plastic 
Side Panel Type4 mm Tempered Glass Side Panel 
Compatibility and Clearances  
Mainboard SupportExtended ATX, ATX, Micro ATX, ITX 
Maximum Motherboard Size305 mm x 277 mm 
Maximum PSU Length230 mm 
Maximum CPU Cooler Height165 mm 
Maximum GPU Length380 mm 
Access and Control  
Power1 
Reset1 
USB 3.02 
HD Audio IN1 
HD Audio OUT1 
USB 3.1 Gen 2 Type-C1 
PCIe and Slots Drive Bays  
PCIe Slots7 
3.5″ HDD Bays*3 
2.5″ SSD Brackets3 
Fan Capacity120 mm140 mm
Front32
Top22
PSU Shroud20
Rear1
Dust FilterTop / Bottom
Radiator Capacity  
FrontUp to 360 mm 
TopUp to 280 mm 
RearUp to 120 mm 
Parts and Accessories  
Fans Included2 x 120mm Fans in Front, 1 x 120mm Fan in Rear 
Seasonic CONNECT1 (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 Brackets1 
Removable Dust Filters2 
Cable Management Cover0 
PSU Shroud0 
Motherboard and 2.5″ SSD Screws17 
Motherboard Standoff8 
3.5″ HDD Screws8 
Power Supply Screws6 
Reverse Fan Screws0 
Cable Tie8 
User Manual1 
Fabric Gloves (Pair)0 
Soft Cloth0 
Warranty  
ARCH Q5032 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

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6 comments

  1. 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.
  2. 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.
  3. 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).
    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.
  4. 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.
    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.
  5. 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.
    Very disappointing coming from Seasonic.

    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.
    True.

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