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05-23-2012, 12:07 AM   #1
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Prime m -> prime ii

I did some measuring yesterday. I have at home at the time 645D, K-5, K-01 and Q. To my findings the PRIME M is twice the speed of PRIME II. This is only a small measuring, since I did bursts of RAW+jpg and RAW-only and jpg-only. With the K-01 there was a faster writespeed then ever possible was with K-5. It topped out at about 25 MB/s.

So no idea wheater the PRIME M has more in it, or is working at it max-speed or that limitation is in processing or going true the pipes of electronics. It could also be that part of it's performance is only for video. I have no idea how that works.

I used a SanDisk PRO 95MB/s UHS-I card for this.

05-23-2012, 07:56 AM   #2
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Pretty sure it's a new chip. My favorite thing about it is how fast playback mode it.

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05-23-2012, 08:33 AM   #3
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If i remember correctly you could do 21MB/s with the K5 so 25MB/s is not twice the speed...
And we are talking about the whole system not the processor.

What about RAW only?
05-23-2012, 09:12 AM   #4
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QuoteOriginally posted by Anvh Quote
If i remember correctly you could do 21MB/s with the K5 so 25MB/s is not twice the speed...
And we are talking about the whole system not the processor.

What about RAW only?
The K-01 could do RAW only at 1 fps without any limit.

The twice the speed is not about the writingspeed (K-5 topped at about 19 MB/s writespeed on average). I did a test with RAW+JPG *** with al lens-aberation-hilight corrections turned ON. After the buffer was full (K-01 only takes 2 or 3 pictures in the buffer) the K-01 was twice as fast in processing and writing then the K-5. This was to test the processor at it's most bussiest time with shiploads of work.

05-23-2012, 10:38 AM   #5
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You didn't made that clear with your first comment and only clearly stated the writspeed so that's what i mean.

I'm very curious about the RAW performance of the Prime-m but it's hard to test because of the bit rate difference and because of the low FPS speed of the K-01.
Basically you didn't add any new information then what you said last time.

12bit RAW has 68 719 476 736 colour combination
14bit RAW has 4 398 046 511 104 colour combinations
So about 64 times more information.
That's also a point to consider.

It surely is fast with Jpeg but i'm not convinced with RAW yet.
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