So please, if anyone has any information about the new Extreme 45MB/s cards, please share it. I should decide within 6 days to return it or not. I would be pleased if it worked and the procedure of returning and buying again could be avoided. Thank You!

When you say don't buy from Amazon are you talking about third parties on Amazon or Amazon itself? If Amazon ships it from their storage center then surly it's legit.

@DirkVoorhoeve

Do you guys reformat the expensive 95MB/s cards in your GH2

Of course.

and if so: will it be FAT32?

No.

The GH2 supports SDXC card and so it can read them and write/format them properly (unlike, say, the GH1).

@AfricaGH2 There are a few numbers on these cards:

• Class 10: at least 10MB/s write and read speed. This is the only reliable number out there, for minimum write speed. There was no class stated on the Extreme Pro 45 cards, and this might be for the reason that it's minimum write speed could drop below 1MB/s. Minimum write speed is important for spanning, as far as I understand. Please note: 10 MB/s [capitals: MegaByte per second] = 80 mbps [lowercase: megabit per second]

• 300x or 45MB/s (or 600x or 95MB/s). This is 300x 150kB/s =45MB/s. This is a maximum write speed, as measured by Sandisk itself (Sandisk recommends: Sandisk).

• UHS-1. This means the card is using a bus speed up to 100Mhz and it is using 4-bit bus. What this means is that the theoretical maximum speed a UHS-1 card can reach will be 100x4/8bits = 50 MB/s. This is: if your device is supporting UHS-1 or 100Mhz and 4-bit bus. There also are higher bus speeds: UHS-104 (up to 104MB/s) and UHS-II (up to 312MB/s). As far as I understand, the GH2 supports the SD specs v.1.10: 4 bit bus with clock speed of 50 MHz = maximum of 200 mbps = 25MB/s.

• If I understand correctly, the number you are looking for is an avarage write speed of 25MB/s when using it inside of your GH2. This is not stated anywhere. So testing will be the only way to know. As many on this forum are doing right now.

• Also: formatting will be a factor for speed. SDXC cards are exFAT formatted from factory. Do you guys reformat the expensive 95MB/s cards in your GH2 and if so: will it be FAT32?

Also I suggest everyone google H2testw and download this program and see what speed your actual card is getting.

So, (final answer) is the latest offering from SanDisk, SanDisk 32GB SDHC Memory Card Extreme Class 10 45 MB/s available at BH, http://www.bhphotovideo.com/c/product/828326-REG/SanDisk_SDSDRX3_032G_A21_32GB_SDHC_Memory_Card.html recommended for the latest Driftwood settings or not?

I ordered the recommended card, Extreme HD Video 32GB 30MB/s at the end of February and got the same as telefoninomac, touviere7 and sumo (Extreme 32GB 45 MB/s - SDSDX-032G-X46). I read here that it should perform the same as the older HD Video cards but not tested yet in every situation. What do You guys recommend to do with it, send it back (within a week), get money back and try to purchase the old one, or unbox what i have now and start to use it? Thank You!

This is my first post. First of all, I want to say thank you for all your work. I will buy a GH2 in the next few weeks, but in the meantime I've read a lot about hack, settings and cards. I knew about "spanning problem", so I wanted to immediatly buy the Sandisk HD Video 30 MB/s Class 10 32gb and I've bought it on 1st March on Amazon.it (IT it's for ITALY). Price: 43€. Today 5th March I was very disappointed when I saw that this card arrived: a Sandisk Extreme 45MB/s Class 10 32gb. But then I read about the tests of sumo and touviere7 and I started to breath again, because you say it's reliable. I can't try this card, I'll buy the GH2 in the next few weeks, but I want to show you the photos of the front and the back of the box, where there is the code, and say you what possibly will happen when you buy a HD Video 30MB/s Class 10 32gb card now.

So, I hope that's a sort of help. Thank you. p.s. I hope my beeing a Mario isn't problem for the understanding of this post!

to compare the test from @sumo, here are my findings with the new extreme 45Mbps card, using a SIIG card reader, usb3.

@JackBayer Yeah it just stops recording, kind of like the old roll-outs when shooting film and hitting the end of the roll. We've started calling it a roll-out on set cuz our seasoned film actors are used to that term when having to stop for that reason. But the files are fine. (And the actual cutoff time on 9b is 3:56)

@Shian

So the cam just stops recording when the file size of the current clip reaches 4GB? But the resulting clip is allright, or should I stop before that (@ below approx. 4 minutes clip length) ?

OK, so I got my 45MB/s card. Its the same as the RawB/touviere7 one :)

I first ran it through CrystalDiskMark and got the numbers in the screenshot. Done using a USB3.0 reader...

Then I loaded up seAQuake with v1.0 FW, stuck the camera on a tripod and aimed it at my monitor where I had a program I made which displays a stupid fast kaleidoscope effect using the "stray color chart 2" death chart in the link above as the texture.

I tried displaying the chart on my screen as a static image and jerking the camera around but the kaleidoscope produced a slightly higher average bitrate before killing my class 4 card so I think the kaleidoscope is more stressful... and I don't have to sit at the PC wobbling my camera all the time ;)

So I let the camera record on these settings:

Minolta Rokkor M-mount 40mm/f2 lens 24H/Cinema movie mode 1/25s shutter Manual exposure Tungsten WB Auto ISO Smooth -2-2-2-2 i.DR etc were off

It produced a 4GB file before dying, so no spanning. However it seems to cope with seAQuake fine under the spanning limit.

I also attached a stream parser shot for those interested.

So in conclusion it seems like its a worthy replacement for the 30MB/s so far. It will need more testing with other settings though to see if it is consistently stable.

I'll try other settings patches when I get some time and post my results here.

Hi, please tell me, if I summarize this thread correctly for my case:

I bought 2x SanDisk Extreme Pro SDHC UHS-I Cards, 32GB 95MB/s (SDSDXPA-032G-x46)

I gather: - They will be fast enough for everything that @Driftwood and @Lpowell currently come up with. - The only problem seems to be spanning large takes after 4 minutes which works better (or only??) on the 64GB cards of the same type.

Thanks! I hope I won´t have to return them...