FS7: XQD-M series and FW V3.10

B

Babu

Well-known member
Just wanted to let people know that I was able to successfully record in all modes on the FS7 with the 64gb M card no problem. Sony FW update manual stated M cards work only with XAVC-L. Having tested it in XAVX-I 4K60P and XAVX-I HD180p no hiccups. B&H has them in stock and I'll be updating my N cards with these.
 

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Sony don't say the cards don't work just that they are not guaranteed in all modes which is the worst possible advice for customers.

I won't be brave enough to risk using the M cards and will stick with the G cards despite their cost.
 
alohype said:
Couldn't agree more. Maybe it will be ok in normal temperature but in high/low it will drop frames? Man.. I (and many others) cannot take a risk like that...
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I suspect these M cards will go tits up on those occasions you absolutely cannot reshoot. All other times they'll perfectly fine...
 
I have been perfectly satisfied with my Lexar cards. Not failed me once in any mode or shoot.

Whats the specs on the Sony G and M cards in comparison?
 
G cards are faster to write. 400MB/s vs 150MB/s. I have four 128GB G cards that take me through my shooting days easily. Nice to know these can keep up in all modes.
 
Yeah, i just did that on an expensive SanDisk cards for my a7S. Never ever had my cheaper Kingston cards fail, but the SanDisk Extreme Pro failed just 4 months old.

I guess in this world you dont always get what you pay for.
 
Martin.G said:
Yeah, i just did that on an expensive SanDisk cards for my a7S. Never ever had my cheaper Kingston cards fail, but the SanDisk Extreme Pro failed just 4 months old.

I guess in this world you dont always get what you pay for.
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All memory cards can fail but the more expensive ones are the ones that come off the production lines with the least errors to begin with. Memory just like CPUs are graded during production and 'binned' into various grades. Memory cards able to be clocked fast without many errors are sold for a premium e.g. Sandisk's Extreme Pro range other grades will end up as bargain memory cards from other brands. A cheap 64GB card can actually be a 128GB card with a significant number of errors but the memory controller on the card marks the failed memory locations from being used.

You do tend to get what you pay for but there are no fixed boundaries for failure. When you consider how much data and how fast it is being generated and on a postage stamp size card I'm amazed they work so reliably. I'd be pissed off if one of my £400 G Series card failed though.

Martin.G said:
But isnt 600mbps 4K 50p about 75MB/s?

So my 200 MB/s cards should be perfectly fine.
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It's obviously not the the overall write speed that is a limiting factor because the M Series cards are sufficiently quick. I can only assume the memory controller on the card can't sustain these speeds for extended periods or in certain environmental conditions as Sony doesn't guarantee reliability across the board. I also suspect these cards are intended for their new 4k Broadcast videocamera line up which shoots XAVC-L 4K. So G series for peace of mind in the FS7.

I'd be interested to know if the newer Lexar card now work with 3.1.
 
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Good and insightfull explanation Nirv.

I may get some G cards for critical shots later on, but for now i mostly do work that can be replicated in case of a failure. The price sure is steep! Right now the Lexar is going for 1300,- NOK, while the Sony G price is 3000,- NOK so its quite the difference. Especially when buying four cards at the same time.
 
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