SUMMARY
Lexar has confirmed that CFexpress memory cards generate more heat than SD cards, attributing this to the higher power consumption required for faster data transfer speeds. This phenomenon is an industry-wide challenge, particularly as camera manufacturers push for higher resolutions, faster burst rates, and more demanding video specifications. While metal casings on CFexpress cards aid thermal management, proximity to a hot camera body can exacerbate the issue. Lexar is actively working on solutions, including developing lower-power controllers and refining thermal management strategies.
TAKEAWAYS
CFexpress cards generate more heat than SD cards due to physics and higher data transfer demands.
Metal casings on CFexpress cards are designed for thermal management, not just aesthetics.
Camera bodies already running hot can worsen the thermal issue when using CFexpress cards.
Lexar is developing solutions like lower-power controllers and improved thermal dissipation.