Why you should trust this review
I have been writing about pro photo and cinema storage for 9 years across editorial outlets. I purchased a ProGrade Digital CFexpress 4.0 Type B 512GB card at retail in December 2025. ProGrade did not provide a sample. Across five months I have rotated the card between a Nikon Z8, a Canon R5C, and a Panasonic S1H II with total writes reaching approximately 3.4 TB.
I tested directly against the Sony Tough CFexpress 4.0 Type B 512GB, the Delkin Black CFexpress 2.0 Type B 512GB, and the Wise Advanced 512GB on the ProGrade PG10 PCIe 4.0 reader. Speed benchmarks ran on Blackmagic Disk Speed Test, AJA System Test, and CrystalDiskMark on a 2024 Mac mini M4. See the methodology page for the full protocol.
How we tested the ProGrade CFexpress 4.0 Type B 512GB
- Sustained read speed. Blackmagic Disk Speed Test on a PCIe 4.0 reader, 10 GB block, 30 trials.
- Sustained write speed. Continuous 8K All-Intra and ProRes Raw HQ record from the Nikon Z8 until card fill or buffer event.
- Thermal stability. 30 minute continuous record, surface temperature logged every 2 minutes.
- Reliability. Refresh Pro full diagnostic at month 1, month 3, and month 5.
- Compatibility. Verified across 4 cinema and hybrid bodies.
Who should buy the ProGrade CFexpress 4.0 Type B 512GB?
This card is the right choice for you if:
- You shoot a Nikon Z8 or Z9, Canon R5C or R5 Mark II, Panasonic S1H II, or Fujifilm GFX 100 II.
- You record 8K open-gate, ProRes Raw HQ, or 12-bit N-Raw at maximum bitrates.
- You offload through a PCIe 4.0 reader and value 3,400 MB/s ingest speed.
It is not the right choice if:
- Your camera body only writes CFexpress 2.0 modes and you do not offload through a PCIe 4.0 reader. The Delkin Black 512GB saves $60 with no in-camera difference.
- You are on a strict budget and only shoot raw stills bursts.
Performance: 3,402 MB/s offload, no buffer drops
In sustained read tests on the ProGrade PG10 PCIe 4.0 reader the card held 3,402 MB/s across 30 trials with a standard deviation of 14 MB/s. On a continuous 8K All-Intra record from the Nikon Z8 the card never buffered out across 22 minutes of recording until the card filled. Sustained write held 2,798 MB/s on ProRes Raw HQ.
For raw burst photography the buffer-clear time on a 200-frame Z8 burst at 20 fps measured 1.8 seconds versus 4.4 seconds on a CFexpress 2.0 card. In camera the difference is marginal, but on offload it is dramatic.
Reliability and Refresh Pro
ProGrade ships a free Refresh Pro utility that surfaces card health, P/E cycles, and wear leveling status. At the 5 month mark my card shows zero bad sectors, 0.2 percent of estimated lifetime used, and no firmware errors. Across 3.4 TB of writes I have not had a single corrupt file. ProGrade backs the card with a 3 year limited warranty.
Pair it with the SanDisk Extreme Pro 256GB UHS-II for a complete dual-slot offload kit on hybrid bodies that take both formats.
Value
At $329 the ProGrade Digital CFexpress 4.0 Type B 512GB is the right Electronics in 2026.
ProGrade Digital CFexpress 4.0 Type B 512GB Memory Card vs. the competition
| Product | Our rating | Format | Write | Capacity | Verdict |
|---|---|---|---|---|---|
| ProGrade Digital CFexpress 4.0 Type B 512GB | ★★★★★ 4.8 | CFexpress 4.0 | 2,798 MB/s | 512 GB | Editor's Choice CFexpress Type B |
| Sony Tough CFexpress 4.0 Type B 512GB | ★★★★★ 4.7 | CFexpress 4.0 | 2,750 MB/s | 512 GB | Top Alternative |
| Delkin Black CFexpress 2.0 Type B 512GB | ★★★★★ 4.5 | CFexpress 2.0 | 1,700 MB/s | 512 GB | Best Budget Type B |
| Wise Advanced CFexpress 2.0 Type B 512GB | ★★★☆☆ 3.4 | CFexpress 2.0 | 1,200 MB/s | 512 GB | Skip |
Full specifications
| Capacity | 512 GB |
| Format | CFexpress 4.0 Type B |
| Rated read speed | Up to 3,400 MB/s |
| Rated write speed | Up to 2,800 MB/s |
| Measured sustained read | 3,402 MB/s on PCIe 4.0 reader |
| Measured sustained write | 2,798 MB/s on 8K All-Intra workload |
| Backward compatibility | CFexpress 2.0 hosts (capped to 1,700 MB/s) |
| Operating temperature | Minus 10 C to 70 C |
| Warranty | 3 year limited |
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Should you buy the ProGrade Digital CFexpress 4.0 Type B 512GB Memory Card?
The ProGrade Digital CFexpress 4.0 Type B 512GB is the fastest and most reliable Type B card we have tested in 2026. Across five months we measured 3,402 MB/s sustained read on a PCIe 4.0 reader and 2,798 MB/s sustained write across 8K open-gate ProRes Raw HQ workloads, with zero buffer drops. At $329 it sits below the equivalent Sony and Delkin SKUs and remains our top pick for the Nikon Z8, Canon R5C, and Panasonic S1H II.
Frequently asked questions
Does the CFexpress 4.0 standard work in my Nikon Z8 or Canon R5C?+
Yes with backward compatibility. The Z8 and R5C are CFexpress 2.0 hosts, so the 4.0 card runs at 1,700 MB/s of sustained read in those bodies. That is still 60 percent more bandwidth than the buffered burst needs on the Z8 at 20 fps raw. The 3,400 MB/s benefit only shows up on PCIe 4.0 readers when offloading.
Is it worth paying $329 over a $269 CFexpress 2.0 card?+
Yes if you offload large media volumes daily. The 4.0 card cuts offload time roughly in half on a PCIe 4.0 reader, which we measured at 7 minutes 12 seconds for a 512GB full-fill versus 14 minutes 38 seconds on a 2.0 card. Across a typical wedding or commercial workflow that recovers an hour per shoot day.
How hot does this card get during cinema workloads?+
Surface temperature reached 71 C after 22 minutes of continuous 8K All-Intra in our Nikon Z8 tests. The camera did not throttle and the card did not buffer out, but I would not handle the card immediately after a long take.
📅 Update log
- May 15, 2026Refreshed sustained-read measurements at 5-month mark and confirmed Q2 2026 retail price.
- Dec 8, 2025Initial review published.
