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CompactFlash memory card, black label, 128GB capacity, 600MB/s read speed

Digital Speed

Digital Speed 4000X 128GB 600MB/s Mach III CF memory card

SKU CH-JZ38-8ABV6

Professional CF card holds 128 GB, delivers 600 MB/s read speed and Class 10 performance for 1080p, 3D and 4K capture

  • 128 GB capacity stores extended 4K and 1080p footage
  • 600 MB/s read speed accelerates file transfer to computer
  • UHS-II U3 rating sustains high-quality 3D and 4K video capture
  • Class 10 specification guarantees minimum write performance for Full HD
  • Downloadable Image Rescue software recovers lost photos and select video files

Professional CF Card for High-Resolution Capture

The Digital Speed 4000X is a 128GB CompactFlash memory card built for photographers and videographers who record Full HD, 3D, and 4K content. It meets the UHS Speed Class II specification and carries a Class 10 rating, ensuring the sustained write performance required by professional DSLR, HD camcorder, and 3D camera workflows.

UHS-II Interface Accelerates Workflow

The card leverages UHS-II technology to deliver a maximum read speed of 600MB/s, dramatically reducing file transfer times from card to computer. Backwards compatibility with UHS-II devices allows it to function in existing compatible slots, while the included downloadable Image Rescue software provides a safety net for recovering most photos and select video files.

Sustained 600MB/s Read for Continuous Offload

Under sustained load, the card maintains its 600MB/s (4000x) read capability, preventing bottlenecks during large batch offloads of 1080p and 4K footage. This consistent throughput keeps post-production pipelines moving without the slowdowns common with lower-class media during extended transfer sessions.

How it compares

Measured against everything we stock in SD & MicroSD Memory Cards, at today’s prices. Recalculated every night.

Price $853.99
Pricier than about 91% of the 1,947 comparable items (median $46.99).

Specifications

Product
Brand nameDigital Speed

Questions about this item

What is the maximum read speed the 4000X card can sustain when recording 4K video?

The card delivers a maximum read speed of 600 MB/s, rated at 4000x, which supports continuous 4K capture.

How much heat or noise does the CF card produce during all-day shooting?

Solid-state CF cards have no moving parts, so they generate no audible noise and only minimal heat during extended use.

Which camera slot or reader do I need to use this CompactFlash card?

You need a device with a CompactFlash slot that supports UHS-II (U3) to reach the 600 MB/s read speed.

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