Lexar Professional GOLD CFexpress 4.0 Type B 256GB is a high-speed memory card for cameras with a CFexpress Type B slot. Using the PCIe 4.0 interface it reaches up to 3600 MB/s read and 3300 MB/s write, about twice as fast as CFexpress 2.0 cards when used with a 4.0 reader. The card suits high-bitrate video, RAW recording and long photo bursts. It is dust…
Lexar Professional GOLD CFexpress 4.0 Type B 256GB is a high-speed memory card for cameras with a CFexpress Type B slot. Using the PCIe 4.0 interface it reaches up to 3600 MB/s read and 3300 MB/s write, about twice as fast as CFexpress 2.0 cards when used with a 4.0 reader. The card suits high-bitrate video, RAW recording and long photo bursts. It is dust resistant (IP5X), survives 5 m drops and 1500G shocks, works from -12 to 72 °C and comes with access to Lexar Recovery Tool.
Looking for a fast CFexpress Type B card for high-bitrate video and long RAW bursts? The Lexar Professional GOLD CFexpress 4.0 Type B 256GB uses the PCIe 4.0 interface and reaches up to 3600 MB/s read and 3300 MB/s write, so your camera clears its buffer quickly and footage offloads in a fraction of the time with a CFexpress 4.0 reader. The card is designed for working conditions on location with IP5X dust resistance, 5 m drop and 1500G shock resistance and a wide operating temperature range. It is backward compatible with CFexpress 2.0 Type B devices and comes with access to Lexar Recovery Tool and a limited lifetime warranty.

Choose this card for cameras with a CFexpress Type B slot when speed and reliability matter.


CFexpress Type B is the larger CFexpress card format used by many professional photo and video cameras. Version 4.0 is based on PCIe 4.0 and doubles the possible bandwidth compared with CFexpress 2.0. In older Type B devices the card works at the speed the device supports.
Note: Lexar does not state a VPG rating for this card; for guaranteed video modes always check the camera manufacturer's list of recommended cards.
The GOLD Type B series shares the same read speed; sustained write grows with capacity.
| 256GB | 512GB and larger | |
|---|---|---|
| Speed | ||
| Max read | 3600 MB/s | 3600 MB/s |
| Max write | 3300 MB/s | 3300 MB/s |
| Sustained write | approx. 1000 MB/s | approx. 3000 MB/s |
Yes, at the maximum speed of the camera.
No. Type B is a larger format; Type A cameras need a Type A card.
About 1000 MB/s; 3000 MB/s applies to 512GB and larger.
Lexar states IP5X dust resistance; water resistance is not stated.
A CFexpress Type B reader; for full speed a CFexpress 4.0 Type B reader.

Note: card reader is not included.
| General | |
|---|---|
| Brand | Lexar |
| Model | Professional GOLD CFexpress 4.0 Type B |
| Code | LCXEXP4256G-RNENG |
| Product type | Memory card CFexpress 4.0 Type B |
| Use | Photo and video cameras with CFexpress Type B slot |
| Capacity and speed | |
| Capacity | 256 GB |
| Interface | PCIe 4.0 |
| Max read | up to 3600 MB/s |
| Max write | up to 3300 MB/s |
| Sustained write | approx. 1000 MB/s (256 GB) |
| Video rating | – |
| Durability | |
| Water / dust | IP5X (dust) |
| Operating temperature | -12 °C to 72 °C (storage -25 °C to 85 °C) |
| Shock / drop | 1500G shock, 5 m drop, 10–2000 Hz vibration |
| Other | 70N compression, up to 12,000 insertions |
| Physical | |
| Format | CFexpress Type B |
| Dimensions | 29.6 × 38.5 × 3.8 mm |
| Weight | 7.8 g |
| Warranty | |
| Warranty | Limited lifetime warranty (limited to 10 years from purchase in Germany and in regions that do not recognise lifetime warranties) |
The card works only in devices that support CFexpress Type B cards. Maximum speeds require a CFexpress 4.0 Type B reader.
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