Prime m -> prime ii

RonHendriks1966 · 05-23-2012, 12:07 AM

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.

Adam · 05-23-2012, 07:56 AM

Pretty sure it's a new chip. My favorite thing about it is how fast playback mode it.

Anvh · 05-23-2012, 08:33 AM

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?

RonHendriks1966 · 05-23-2012, 09:12 AM

Originally posted by Anvh

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.

Anvh · 05-23-2012, 10:38 AM

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.

05-23-2012, 12:07 AM	#1
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675	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
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	Pretty sure it's a new chip. My favorite thing about it is how fast playback mode it. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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05-23-2012, 08:33 AM	#3
Anvh Veteran Member Join Date: Sep 2011 Posts: 4,616	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
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675 Original Poster	Originally posted by Anvh 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
Anvh Veteran Member Join Date: Sep 2011 Posts: 4,616	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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