(2014-11-11, 09:06)twistyplain Wrote: (2014-11-09, 11:35)los33 Wrote: The 450 mp & 450 mp4 are the same chipsets with just minor fixes.
The MP version is the more powerful version which most of the 6592 chips include while the mp4 is put in the quad core.
These two chips can easily run 1080p with only 726mb ram as most of the processing power is spread thru the cpu cores and uses maybe 256 mb ram just to consistently transfer the bandwidth thru the cores.
These current phones being produced are using a 2013 build of the driver which you will notice lag in videos whether they are 1080p or 320p because of a vram issue.
If you update the driver and enable 1080p thru the gpu configs then you will undoubtedly get lag free from videos. But games is another problem as not all games are v3 shader optimized which the mali uses.
Really it would be rarely seen if anything as it would cause a millisecond lag.
I agree that these GPUs are all the same version. But there is no Mali 450 - all of them have a MP at the end - the MP could be short for Multi-Processor. The 4 in Mali 450MP4 means that the GPU has 4 cores. The minimum number of cores for this GPU is 4 and maximum is 8. The GPUs used in various MTK6592 phones only vary in terms of core frequencies and core counts.
If by the quad-core you mean MTK6582, it has a Mali 400 MP2, not 450.
When I talk about bandwidth here, I am alluding to FSB (Front Side Bus) bandwidth. The CPU, RAM, and GPU use this bus to transfer the massive amount of data that moves in between them. It the bus is not wide enough, you must reduce the total amount of data moving through it for smooth performance - a 1080p screen needs more than 2 megapixels per frame but a 720p screen only needs 900k pixels per frame.
MP stands for multi processing to be exact.
Now you must only be knowledgable of normal computer operations & mediatek devices.
The samsung galaxy s3 used the mali 400 MP as its gpu not just mediatek devices.
Also MP4 means it ONLY has 4 cores.
Now in mobile phones the gpu shares the cpu cores and does not have its on cores to work with nor does it use a dedicated FSB to transfer its bandwidth to produce image pixels.
The gpu is alloted an amount of ram by android of which it may use to share data over the available cores allowing more resolution to be possible without causing cpu spikes lowering frames per second and/or pixels per square.
In the mp4 version 480p was made default because when 720p was forced it would cause the available cores to spike causing a very slow image for videos, but with the newer chipsets that can handle much more because of cores now being able to transfer all processes much faster.
In turn allowing 720/1080p.
So all in all the screen size matters more on how fast the available cores to transfer its processes.
On a side note the mali 450 MP has a minimum of 1 core or as many as its limited tested 16 cores which is only used on desktop or laptop based mali 450 mp chipsets.