I have a upcoming shoot in less than 2Weeks, we want to shoot @ 50fps. So far I am using my KB 64GB 1000x which works fine @50fps upscaling to 1920*818.
I am not sure if I should get the same card again or maybe use the 128GB 1050x? Anyone tried 50fps or compared the 2 cards?
Get more 64gb cards, the 128g 1050 isn't all its cracked up to be. Its slower. And a benchmark in playback is useless. So those numbers of 110-115 will not happen when you are actually recording. I went from the 128 card to the 64gb and all the performance unreliablilities went away.
When you look at the card tests for different buffers on these tests.
64Gb - Out of the top 8 buffer sizes, 7 could do continuous recording.

128gb - Out of top 8 buffer sizes, 5 will do continuous OK.... probably, 2 of them are on the edge... so probably more like 3 out of 8.

The 64gb card is just way more consistent across the different buffer sizes. I was convinced to get the 128gb 1050 card.. and i wish i just got the 64gb from the start. Don't get me wrong, the 128gb card is great.. inexpensive.. and fast... but not quite fast enough to be used in RAW with consistent performance.
And remember, if you are recording at High FPS those modes transfer even slower than in 1080p mode(at least i cant find a way for it to do it at the same speed) Regardless of card recording at high FPS seems to stay below 80mb/sec even though in 24p 1080p mode it tapes 110mb/sec on the 64gb card.