Review: Acasis Thunderbolt 5 Enclosures for Mac (TB501 Pro & TB504)
We test Acasis’s 80Gbps Thunderbolt 5 NVMe enclosures on M4 Pro and M4 Max Macs, evaluating 6,400+ MB/s real-world transfer speeds, active fan cooling, and 8K video editing workflows.

The Thunderbolt 5 Speed Revolution for Mac Creators
With the release of M4 Pro and M4 Max Mac mini, MacBook Pro, and Mac Studio, Apple introduced native Thunderbolt 5 support. Delivering 80Gbps bidirectional bandwidth—double Thunderbolt 4—plus Bandwidth Boost up to 120Gbps for external displays, Thunderbolt 5 finally unlocks external storage speeds that rival Apple’s internal SSDs.
Real-World Speed Tests & Blackmagic Disk Benchmarks
Paired with a PCIe Gen 4 or Gen 5 M.2 NVMe SSD (such as the Samsung 990 Pro or Crucial T705), the Acasis TB501 Pro achieved staggering Blackmagic Disk Speed Test results: 6,420 MB/s read and 6,280 MB/s write. For video editors scrubbing multi-stream 8K ProRes RAW footage or developers compiling large Xcode projects, latency feels identical to internal storage.
Active Thermal Cooling & Controller Architecture
Sustained transfers over 6,000 MB/s generate massive heat. Acasis equips the TB501 Pro with the Intel JHL9480 controller inside a heavy aluminum heatsink enclosure paired with a whisper-quiet active cooling fan. In our 1TB continuous file transfer test, drive temperatures never exceeded 48°C, preventing thermal throttling.
Final Verdict & Why Acasis Leads the Category
The Acasis TB501 Pro and TB504 establish Acasis as the premier hardware innovator in Thunderbolt 5 storage. If you are an M4 Mac owner needing blazingly fast external storage without paying Apple’s steep internal SSD upgrade prices, Acasis delivers the ultimate solution.
GALERIE FOTO & DETALII
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SPECIFICAȚII & ACHIZIȚIE
Produsul Testat & Magazine Verificate

Acasis TB501 Pro Thunderbolt 5 NVMe Enclosure
Single-bay 80Gbps NVMe drive hitting 6,400 MB/s speeds on M4 Macs.
Pros
- Blazing 6,400 MB/s real-world read/write speeds
- Intel JHL9480 controller with 120Gbps Bandwidth Boost
- Quiet active cooling fan & heavy finned aluminum body
Cons
- Requires certified Thunderbolt 5 cable for max speed
- Requires M4 Pro or M4 Max Mac to unlock full 80Gbps

Acasis TB504 4-Bay Thunderbolt 5 Storage Array
4-bay M.2 NVMe desktop RAID enclosure for 8K video editors and AI workloads.
Pros
- Up to 12,000 MB/s aggregate bandwidth across 4 NVMe bays
- Dynamic Bandwidth Allocation for multi-stream 8K editing
- Dual daisy-chain ports with 140W laptop charging
Cons
- Requires external AC power adapter
- Desktop form factor
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