TechShelf Guide

PC Cases & Cooling: Choose 3 Fans, 6 Fans, or a New ATX Case

Choosing between a fan pack and a new ATX case? This comparison weighs four PC cases & cooling options by fan quantity, connector, mesh airflow, motherboard fit, radiator room, materials, and power-supply setup.

Last updated Aug 24, 2026

Choosing a PC cooling upgrade means deciding whether to add airflow to an existing case or replace the enclosure itself. Fan quantity and connector type matter for a fan refresh; motherboard format, radiator room, and power-supply setup matter for an ATX computer case. These four choices separate those paths clearly.

Quick take

  • Larger fan refresh: 6 Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fans.
  • Smaller fan refresh: 3Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fan Speed, with the lowest listed price.
  • Mesh enclosure: Phanteks XT Pro Mid-Tower Gaming ATX Gaming PC Case Chassis High Airflow Mesh.
  • Steel ATX enclosure: DIYPC DIY-S05-BK Black USB3.0 Steel ATX Mid Tower Computer Case.

The listed prices have a $52.00 spread from the lowest to highest, so fan expansion and case replacement are separate purchase decisions.

Listed-price comparison

The price bars show each item's relative position within this four-item range.

ProductListed pricePrice bar
6 Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fans$19.99
3Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fan Speed$9.99
Phanteks XT Pro Mid-Tower Gaming ATX Gaming PC Case Chassis High Airflow Mesh$61.99
DIYPC DIY-S05-BK Black USB3.0 Steel ATX Mid Tower Computer Case, 3 x120mm Blac$37.49

Decision matrix

NeedProductConcrete fit
Existing case with more fan coverage6 Pack Black 120mm PC Case FansSix-pack wording and silicone cushions
Existing case with a smaller package3Pack Black 120mm PC Case FansThree-pack wording and 12 included screws
Mesh enclosure with several motherboard formatsPhanteks XT Pro Mid-Tower Gaming ATX CaseHigh-airflow mesh and listed ATX, micro-ATX, mini-ITX, and E-ATX support
Steel enclosure with USB3.0 and no power supplyDIYPC DIY-S05-BKSteel ATX mid-tower format and stated no-PSU configuration

Product notes

6 Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fans

6 Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fans

At $19.99, the 6 Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fans suits a broader fan refresh. Its description specifies hydraulic bearings, a 3-pin motherboard connection, 1200 RPM, low-noise operation, and soft silicone cushions for vibration absorption. That gives the pack a clear role when several matching fans are needed without replacing the case. The limitation is the fixed 3-pin interface, which may not suit a build planned around another connector type. Its six-fan quantity can also exceed the needs of a smaller change. Choose it for the larger pack and cushion design, not as a universal connector solution.

3Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fan Speed

3Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fan Speed

At $9.99, the 3Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fan Speed fits a smaller refresh and carries the lowest listed price. Its description includes 1200 RPM, 47.8 CFM, 32.1 dBA, a 3-pin connector, and 12 screws. The black design has no light effects, keeping the visible treatment simple. The limitation is the three-fan quantity: a plan needing more replacements calls for a different package choice. The 3-pin connector is another constraint for a build organized around another connector type. Choose it when the package count and screw inclusion match the work.

Phanteks XT Pro Mid-Tower Gaming ATX Gaming PC Case Chassis High Airflow Mesh

Phanteks XT Pro Mid-Tower Gaming ATX Gaming PC Case Chassis High Airflow Mesh

At $61.99, the Phanteks XT Pro Mid-Tower Gaming ATX Gaming PC Case Chassis High Airflow Mesh is the case-first choice for a new enclosure. It specifies a steel chassis, tempered-glass window, ABS plastic, and support for ATX, micro-ATX, mini-ITX, and E-ATX motherboards up to 280mm wide. Front, top, and rear radiator options are also listed. Those attributes make it useful when board format and cooling placement must be considered together. The limitation is that vertical GPU support uses an optional bracket, so that feature requires an additional part. Its price is the highest in this comparison, making it a case purchase rather than a fan-pack substitute.

DIYPC DIY-S05-BK Black USB3.0 Steel ATX Mid Tower Computer Case

DIYPC DIY-S05-BK Black USB3.0 Steel ATX Mid Tower Computer Case, 3 x120mm Blac

At $37.49, the DIYPC DIY-S05-BK Black USB3.0 Steel ATX Mid Tower Computer Case suits a straightforward ATX mid-tower replacement. Its title includes USB3.0 and 3 x120mm, while the description specifies a black steel case with no power supply. That combination fits a plan centered on the enclosure and its stated fan-count wording, with power hardware handled separately. The description also states no side-panel window and no LED, which limits the fit for shoppers who specifically want either visible feature. Choose it for the steel ATX format and simple setup; the no-PSU configuration is the key constraint.

Final recommendation by use case

For an existing case, stay with a fan pack: the 6 Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fans matches a larger quantity and silicone cushions, while the 3Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fan Speed fits a smaller quantity, 12 screws, and the lowest listed price. For a replacement case, choose the Phanteks XT Pro for high-airflow mesh, tempered glass, and several motherboard formats. Choose the DIYPC DIY-S05-BK for a steel ATX mid-tower with USB3.0 when a power supply is not part of the case configuration. Start with the physical change-fans or enclosure-then use the listed connector, format, and included hardware to make the final call.

Products in this article
6 Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance FansUSD 19.99View on eBay3Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fan SpeedUSD 9.99View on eBayPhanteks XT Pro Mid-Tower Gaming ATX Gaming PC Case Chassis High Airflow MeshUSD 61.99View on eBayDIYPC DIY-S05-BK Black USB3.0 Steel ATX Mid Tower Computer CaseUSD 37.49View on eBay
6 Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance FansUSD 19.99View on eBay3Pack Black 120mm PC Case Fans High Airflow Low-Noise High Performance Fan SpeedUSD 9.99View on eBayPhanteks XT Pro Mid-Tower Gaming ATX Gaming PC Case Chassis High Airflow MeshUSD 61.99View on eBayDIYPC DIY-S05-BK Black USB3.0 Steel ATX Mid Tower Computer CaseUSD 37.49View on eBay

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