Surprised at this price point to see what it collects. Bought at the time for a FZ1000, she now works for a GH4. The 4K 100mbps pass without flinching throughout the recording, and even some tests on the All-I codec 1080p 200mbps (best, average value, it is less) it takes. Excellent alternative to other cards "specialized" 4K that costs an arm.