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Anybody try these very cheap 128 Cfast cards?

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  • Alibaba is a whole sale website. Generally sellers there are not interested in selling directly to the consumer in smaller quantities. The only way to get small orders from most sellers is to pretend to be a reseller wanting to source a sample. If that's too unethical for you go to eBay and pay ridiculous prices.

    Or if enough people here are interested in these cards maybe we can get a group buy going but that would mean one person would have to put in the order for all the cards because I'm pretty sure Biwin wants to avoid sending out single or two cards to 30 different people.
    Last edited by 4saken; 08-15-2016, 07:49 PM.
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    • Originally posted by 4saken View Post
      Alibaba is a whole sale website. Generally sellers there are not interested in selling directly to the consumer in smaller quantities. The only way to get small orders from most sellers is to pretend to be a reseller wanting to source a sample. If that's too unethical for you go to eBay and pay ridiculous prices.

      Or if enough people here are interested in these cards maybe we can get a group buy going but that would mean one person would have to put in the order for all the cards because I'm pretty sure Biwin wants to avoid sending out single or two cards to 30 different people.
      Well generally Alibaba is a whole sale site. But I did not have to pretend to be a reseller to make the purchase. The sales person just as how many I wanted to order and he was contented at the amount I ordered. I didn't just purchased 1 or 2 so I think you've got the picture.

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      • So my Biwin CFast cards arrived yesterday. I have not done the camera test and will be doing so in the next couple of day. However I did a BM speed test and put them on the URSA for a quick check. The URSA read and write to it just fine at 4K 24fps but as I said, I will still be doing the capture test in the upcoming days. The BM speed test average at 260.4 MB/s and my speculation is that it will just do fine up to 4K 3:1 Raw but possibly start to drop frames on ProRes 4444XQ and 4K 1:1 at greater than 30 fps. But more to come. 4Saken has reported almost the same numbers. I also let the cards write/read in loops for about 8 minutes. The center of the card gets hot to the touch as previously reported. Overall, so far the units arrived with no issues and at about $75 a piece for 256Gb, which I got 4 (and a few more on order). I think it is worth for perosnal use being 4 for the price of 1 new 128 Gb Lexar.

        cfast_biwin.jpg

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        • [QUOTE=EYu;218974]So my Biwin CFast cards arrived yesterday. I have not done the camera test and will be doing so in the next couple of day. However I did a BM speed test and put them on the URSA for a quick check. The URSA read and write to it just fine at 4K 24fps but as I said, I will still be doing the capture test in the upcoming days. The BM speed test average at 260.4 MB/s and my speculation is that it will just do fine up to 4K 3:1 Raw but possibly start to drop frames on ProRes 4444XQ and 4K 1:1 at greater than 30 fps. But more to come. 4Saken has reported almost the same numbers. I also let the cards write/read in loops for about 8 minutes. The center of the card gets hot to the touch as previously reported. Overall, so far the units arrived with no issues and at about $75 a piece for 256Gb, which I got 4 (and a few more on order). I think it is worth for perosnal use being 4 for the price of 1 new 128 Gb Lexar.


          Check to see if the cards work in dual card mode. I got the Delkin Devices 4k 256 gb cards and they don't work in the second slot(transcend card does). The Delkin cards also write at about 250mb/s.

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          • Originally posted by d shay View Post
            Check to see if the cards work in dual card mode. I got the Delkin Devices 4k 256 gb cards and they don't work in the second slot(transcend card does). The Delkin cards also write at about 250mb/s.
            I will check on that as well see if I get the higher frame rates when in Dual mode. I was however able to format the cards from the camera on both slots. More to come...

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            • Well good for you, I tried much of the same yesterday with Alibaba and Daisy from Biwin told me go fly a kite, and I was trying to buy ten of the 256GB.
              Are you able to order more? Would you order for others?
              Last edited by chervas; 08-24-2016, 12:28 PM.

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              • Originally posted by chervas View Post
                Well good for you, I tried much of the same yesterday with Alibaba and Daisy from Biwin told me go fly a kite, and I was trying to buy ten of the 256GB.
                Are you able to order more? Would you order for others?
                Look, by the time it will be priced out that is beneficial to me and everyone, you'll be paying almost what Ebay vendors are charging. I do take local orders only from people who I know with bank LC arrangement who then resells them as private label (I think) in very small quantities through Ebay or their customers. BTW, the price went up so I am not getting the old price anymore. As I said before, the old price was from a previous PI that Biwin agreed to fulfill. Ebay may be your best second place and still save a few bucks.

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                • The biwin cards work fine in dual card mode. I tested that and was able to record full raw at up to 30 fps. at 60fps I was getting dropped frames after about a minute. so for some quick take slomo shots this might even be an option.

                  But in 3:1 & 4:1 raw and dual card mode you can record all possible resolutions and frame rates that the 4.6k has to offer. I didn't try ProRes 4444XQ, that might not work at 60fps since you can't do Prores in dual card mode.
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                  • Originally posted by 4saken View Post
                    The biwin cards work fine in dual card mode. I tested that and was able to record full raw at up to 30 fps. at 60fps I was getting dropped frames after about a minute. so for some quick take slomo shots this might even be an option.

                    But in 3:1 & 4:1 raw and dual card mode you can record all possible resolutions and frame rates that the 4.6k has to offer. I didn't try ProRes 4444XQ, that might not work at 60fps since you can't do Prores in dual card mode.
                    4saken, thanks a lot for all your testing and reporting of your results. I ordered 4 of the 256GB base in your experience with the cards. Lee Miller, the gentlemen selling the cards in eBay, has impeccable costumer service.

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                    • Originally posted by chervas View Post
                      4saken, thanks a lot for all your testing and reporting of your results. I ordered 4 of the 256GB base in your experience with the cards. Lee Miller, the gentlemen selling the cards in eBay, has impeccable costumer service.
                      No worries, I hope the cards work great for you. Report back when you gave them a try!
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                      • So here is my first set of test on the Biwin 256gb cards. For each resolution on the URSA 4K Camera, I tested it at 24fps and 60fps. My test is a taking a continuous 5 minute recording time. Reason for my criteria is I shoot mostly narrative and most of my shoots do not roll for more than 5 minutes. In truth a couple of minutes is a long take. I have not tested dual card mode as that will be my second test. 4saken has positive report on dual mode so please refer to his post here.

                        First, the bad news. 4K Raw at 60fps and UHD 444XQ 60fps had dropped frames after 1 minute on 3 of the cards but on the 4th card it was less than a minute. Not sure if that has to do with the heat. The cards got really hot but I was able to hold it from its edges.

                        The good news. 4K Raw 3.1 and all other UHD and HD Prores codecs at both fps was just fine.

                        I didn't fill up the card test yet. I will do one test of writing 4K Raw until the card fills up tomorrow and report on it next. Overall, I think the cards are workable but I can't attest to its durability since I only had it for a few days. I think even at $150 ebay retail price, it holds well... Until the other cards start coming down in price.

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                        • Originally posted by EYu View Post

                          First, the bad news. 4K Raw at 60fps and UHD 444XQ 60fps had dropped frames after 1 minute on 3 of the cards but on the 4th card it was less than a minute. Not sure if that has to do with the heat. The cards got really hot but I was able to hold it from its edges.
                          This is not "bad" news, it's just how it works. Uncompressed 4K RAW at high frame rates when "off speed recording" is enabled requires dual card mode. It's in the manual - quoting from page 17:
                          "For uncompressed 4.6K and 4K RAW, framerates above 30 fps use dual card mode on all URSA and URSA Mini cameras."

                          I have a 256gb Biwin that was purchased from ebay. As chervas previously mentioned, Lee Miller, the seller, was very helpful and sent frequent updates regarding the status of the shipment. His customer service is on point.

                          4k uncompressed RAW @ 24/60fps in dual card mode worked just fine on my end in conjunction with a Lexar 3400x on the second slot. No dropped frames whatsoever, and it didn't get any warmer than the Lexar did, but this can vary from cam to cam. I've clocked several hours of testing on the card thus far. So far, so good.

                          Whether it's a good idea to mix brands or cards that spec at different write speeds or feature MLC vs SLC is beyond the scope of what I know about the technology. Maybe a Silicon Motion engineer will know the answer. I've used mixed brand/write speed SDXC on dual slot Panny's in the past with no problems, so Ursa doesn't scare me.

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                          • Originally posted by FUEGO View Post
                            This is not "bad" news, it's just how it works. Uncompressed 4K RAW at high frame rates when "off speed recording" is enabled requires dual card mode. It's in the manual - quoting from page 17:
                            "For uncompressed 4.6K and 4K RAW, framerates above 30 fps use dual card mode on all URSA and URSA Mini cameras."

                            I have a 256gb Biwin that was purchased from ebay. As chervas previously mentioned, Lee Miller, the seller, was very helpful and sent frequent updates regarding the status of the shipment.

                            4k uncompressed RAW @ 24/60fps in dual card mode worked just fine on my end in conjunction with a Lexar 3400x on the second slot. No dropped frames whatsoever, and it didn't get any warmer than the Lexar did, but this can vary from cam to cam. I've clocked several hours of testing on the card thus far. So far, so good.
                            Ha!
                            I was suspecting that it has to be in dual mode to achieve it but didn't RTFM on its page 17. I'll find out tomorrow then but thanks for pointing that out. I am curious if the write speed is just right up there at 258MB/s and 4K Raw write is 255MB/s. So it is 444XQ that can cause drop frames at higher than 30fps.

                            Post Lee Miller ebay link so if others are looking for a reputable and confirmed retailer they know where to order from. What is his price?

                            Last, my cards got hot after 5 minutes of recording straight. I am on the URSA Major so it's cam to cam. It cooled down after a few minutes when I took it off. So far not bad for what I paid for it.

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                            • Originally posted by EYu View Post
                              Ha!
                              I was suspecting that it has to be in dual mode to achieve it but didn't RTFM on its page 17. I'll find out tomorrow then but thanks for pointing that out. I am curious if the write speed is just right up there at 258MB/s and 4K Raw write is 255MB/s. So it is 444XQ that can cause drop frames at higher than 30fps.

                              Post Lee Miller ebay link so if others are looking for a reputable and confirmed retailer they know where to order from. What is his price?

                              Last, my cards got hot after 5 minutes of recording straight. I am on the URSA Major so it's cam to cam. It cooled down after a few minutes when I took it off. So far not bad for what I paid for it.
                              http://www.ebay.com/itm/BiWin-256GB-...MAAOSwmtJXX8hK

                              I don't benefit by vouching for this, but it's legit. All I can say is that this particular card from this particular batch works for me. Results may or may not vary, I can't call it.

                              Here are speed tests. I let the cards run for 10 minutes. There is a REDCODE 3:1 option in Aja, but I only tested Prores 4444:

                              Biwin

                              biwin-bmd_test.jpgbiwin-aja.jpg

                              Lexar 3400x

                              lexar-bmd.jpglexar-aja.jpg


                              It makes sense (to me at least) that cards will generate more heat at higher frame rates and affect power consumption due to overcranking. Think about it: it's UNCOMPRESSED 4K RAW AT 60FPS! Sit back, disconnect your brain from forum chatter, look at your machine, and really mull it over.

                              Remember, back in the day cinematographers had to physically crank a lever (!) on a camera to achieve any motion at all. This was just a century ago. Imagine trying to crank a lever on a heavy ass camera with feet of celluloid for a minute at a time to achieve close to 24fps, never mind 60/80/120/240, etc.

                              "...So far, not bad for what I paid for." Damn right, Eyu. All of this shit is amazing, and nobody's content, but I digress...


                              edited to include running time of tests.
                              Last edited by FUEGO; 08-25-2016, 10:03 PM.

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                              • Folks, I promised a follow-up test on those Biwin cards. Like Fuego here, I'm not vouching for it but so far for the price until those Lexar and Sandisk come down to reasonable price point, they are working alternatives for me. So here's what my new test results are:

                                1. 4K Raw 60 FPS Dual Card Mode (2 x 256Gb cards) until full (about 32 minutes of continues recording) - Recording went fine, no drop frames at all. Cards were a bit hot but it was okay to hold.

                                2. 4K 3:1 60, 30, 24, 23.97 run until card was full - Recording was fine, no drop frames at all. Cards were hot but that's because it was writing/reading for about 16 to 40 minutes at different frame rates.

                                3. Prores 422HQ 1080p 80fps Film/Full run card for 30 minutes - Recording was fine, no drop frames at all. Card was warm but okay.

                                From those test, I assumed the lower Prores codecs at the different frame rates are fine as well. Overall, I give this card a thumbs up but with caution.

                                I don't have a 4.6K to test it on so please refer to 4saken's results that were previously posted here.

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