> I want to take advantage of that 40fps burst mode without hitting the buffer too soon. Are V90 cards overkill, or should I stick with V60 for 4K 60p video? Hey! In my experience, V90 is cool but literally double the price. For ur situation, Id suggest V60. I use the Lexar Professional 1667x 128GB SDXC UHS-II V60 for $40 vs the Kingston Canvas React Plus 128GB SDXC UHS-II V90 at $100. V60 handles 4K 60p fine, so its the best budget choice. Just be cautious with long bursts tho! gl!

Seconding the recommendation above! ngl I bought ProGrade Digital 128GB SDXC UHS-II V90 and it’s been great for sports. Buffer clears way faster... totally worth the cash for 40fps!

Just catching up on this thread and honestly, I'm with @sandra.long on not overpaying for the big names. I've been shooting for years and seen too many people blow their budget on cards when they could've put that toward glass. You gotta be careful with some of the super cheap V60s though, because while they handle 4K 60p okay, the R6 II's 40fps burst will absolutely choke them if you're not selective. If you're looking for that V90 speed without the insane price tag, you might want to consider the Silicon Power 128GB Cinema Pro SDXC UHS-II V90. It's been surprisingly reliable for me and usually costs way less than the Sony or SanDisk equivalents. Also, make sure to look at the Transcend 128GB SDXC 700S UHS-II V90 if you can find it on sale, it's a solid veteran choice that people usually sleep on. TL;DR: V90 is the way to go for those heavy bursts, but don't pay the brand tax. Silicon Power or Transcend will save you enough cash for a few extra batteries.

Respectfully, I'd consider another option. I missed a great shot once cuz my V60 card couldn't clear the R6II buffer fast enough during a long 40fps burst, which was super frustrating. I eventually switched to the SanDisk 128GB Extreme PRO SDXC UHS-II V90 and I'm much more satisfied with the reliability. Basically, if you're hitting that burst mode hard, V90 isn't overkill—it's essential insurance. Better safe than sorry!

Basically, if you're diving deep into the 40fps world, you gotta look at sustained write speeds rather than just the marketing fluff on the box. Tbh, a lot of people sleep on the Delkin Devices Power SDXC UHS-II V90 cards, but they’re absolute tanks for the R6 II. I’d also highly suggest checking out a site like Camera Memory Speed (cameramemoryspeed.com) before buying. They run actual benchmarks on the R6 II specifically, and you'll see that some brands definitely throttle faster than others during heavy bursts. Another one to look at is the Sony TOUGH-G series SDXC UHS-II. They’re pricey, but the physical build quality is way better since they don't have those flimsy ribs or write-protect switches that always seem to break off at the worst time. If you’re shooting C-RAW, you might get away with V60, but if you’re shooting full uncompressed RAW at that 40fps rate, the buffer will choke without a top-tier V90. It’s all about how fast that data can clear so you aren't standing there waiting while the action is still happening tho. Definitely worth looking at the data before dropping the cash.

@Reply #7 - good point! I definitely agree that the R6 II can feel like it is choking if you dont give it the right fuel. In my experience over the years, I have seen way too many people get hung up on just the big name brands like SanDisk and pay a massive premium for stuff that isnt actually better. I have been using the Angelbird AV PRO SD MK2 V90 128GB for a few months now and it has been rock solid for those 40fps bursts. The build quality is amazing and they usually run a bit cheaper than the Sony Tough cards while being just as fast. Another one I really like is the Wise Advanced 128GB SDXC UHS-II V90 since it seems to handle heat really well during 4K 60p recording. One thing to watch out for tho is that some V90 cards can be a bit thick for the R6 II slots. I have heard a few folks complain about cards getting stuck or the door being hard to close with certain brands. Just gotta be careful when you first pop them in. Honestly, if you are doing any serious sports or wildlife, skipping the V60 and going straight to V90 is the way to go so you dont have to worry about the buffer clearing mid-action...

> Are V90 cards overkill, or should I stick with V60 for 4K 60p video? Unfortunately, even after spending way too much on top-tier cards for my R6 II, I have been pretty disappointed with the real-world results. I was out shooting some wildlife last week and the buffer still managed to lock me out right during the best action. It is honestly frustrating because you pay such a high premium for these speeds and they still dont feel like they quite bridge the gap during those 40fps bursts. Sometimes it feels like you are just throwing money at a problem that the camera's internal buffer design wont let you solve anyway. It kinda reminds me of the struggle I had finding a camera bag that actually fit into an overhead bin without being a total pain to carry. I went through so many expensive options before realizing that my old hiking pack actually worked better with some simple padded inserts. I spent way too much time and money overthinking the specialized gear when a simpler approach would have been fine. Anyway, the write speed situation is definitely not as straightforward as I hoped it would be.

Bump - same question here

I totally agree that the V90 cards are the way to go for this camera, even if they feel expensive at first!! Honestly, after shooting with my R6 II for a long time now, I realized that the cheaper cards realy start to slow down once they get half full or after they get older. I have been using some brands that werent mentioned yet and they have been super solid for my daily shoots. Basically, here is what I have been using:

• SABRENT Rocket V90 SDXC UHS-II - these are fast and feel realy well made
• Angelbird AV PRO SD MK2 V90
• I use this one for video mostly and it never seems to get hot I dont have all the fancy benchmark data like some of you guys, but for an owner who just wants things to work, these havent failed me yet. One thing I've been wondering tho... does anyone else notice the camera takes a second to wake up if you leave a slow card in the second slot??? I feel like the camera gets a bit grumpy if the cards dont match in speed but maybe I'm just imagining things??

omg the buffer lag on this camera is literally my biggest nightmare!! I've missed so many amazing shots because of that BUSY message flashing on the screen while I'm just standing there helpless... it's the worst feeling ever. Tbh after wasting money on slower cards, I finally went with the Sony SF-G Tough Series 128GB UHS-II SDXC V90 and it’s been a total game changer for those 40fps bursts. The write speeds are insane. If you're looking for a slightly more budget-friendly V90 that still holds its own, I’ve had amazing luck with the Sabrent Rocket SD UHS-II 128GB V90 too. Seriously, dont even bother with V60 for high-speed stuff or you'll be venting just like me when your camera locks up mid-action! Its just not worth the stress lol.

Any updates on this?

Facts.

This ^