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-   -   snpadragon have gpu? (https://talk.maemo.org/showthread.php?t=38991)

mas5acre 2010-01-01 20:03

snpadragon have gpu?
 
Does a snap dragon processor have dedicated gpu capabilities? I know the n900 processor is weaker than the snapdragon, but doesn't it have an opengl Es gpu as well, how does graphic capabilities of snap dragon compare?

Rushmore 2010-01-01 20:11

Re: snpadragon have gpu?
 
There are apparently two flavors of Snap.

1. Dedicated DSP and GPU on die
2. Processor also has DSP and GPU functions built in a lower cost chip option. Device buyers that care about these things should check on what the device they are getting has.

Apparently the 3430 has a more robust DSP and GPU and Snap makes up for this through clock cycles, but at a premium on the battery. Most Snap devices will be capped at either 650mhz or 700mhz due to power and heat concerns. Uncapped Snaps will be in non-phone sized devices.

c0rt3x 2010-01-01 20:16

Re: snpadragon have gpu?
 
The 2009 Snapdragon family consists of one higher clocked stand-alone processor, while the N900's OMAP SoC includes a CPU/GPU/DSP combo. For calculations they're about equal, while the Snappy is obviously inferior for gaming and such. Remember that the DSP (digital signal processor) loads off the N900's main CPU (Cortex A8), while the Snap has to do everything by itself.

c0rt3x 2010-01-01 20:18

Re: snpadragon have gpu?
 
Quote:

Originally Posted by Rushmore (Post 449152)
There are apparently two flavors of Snap.

1. Dedicated DSP and GPU on die
2. Processor also has DSP and GPU functions built in a lower cost chip option. Device buyers that care about these things should check on what the device they are getting has.

Apparently the 3430 has a more robust DSP and GPU and Snap makes up for this through clock cycles, but at a premium on the battery. Most Snap devices will be capped at either 650mhz or 700mhz due to power and heat concerns. Uncapped Snaps will be in non-phone sized devices.

The vast majority of the Snapdragon chips manufactured this year was of the "inferior type" of your description.

Rushmore 2010-01-01 20:27

Re: snpadragon have gpu?
 
Quote:

Originally Posted by c0rt3x (Post 449160)
The vast majority of the Snapdragon chips manufactured this year was of the "inferior type" of your description.


I think the HD2 and the Nexus have version 2. Battery performance will be interesting on a rooted device that allows using all of Snap. Be interesting to see how quick it drains playing a game emulator and how hot they get.


added:

Also video would be interesting, since HTC are infamous for not making at all, or not very good drivers for acceleration.

Sony made drivers for the X2 that uses a Qualcomm 7200 derivative.

c0rt3x 2010-01-01 20:31

Re: snpadragon have gpu?
 
Quote:

Originally Posted by Rushmore (Post 449170)
I think the HD2 and the Nexus have version 2. Battery performance will be interesting on a rooted device that allows using all of Snap. Be interesting to see how quick it drains playing a game emulator and how hot they get.

Both of the devices you mentioned has the QSD8250 chip from 2008, which is the inferior type. I'm sorry, but the later version has recently only reached production status. It'd be very unlikely to see it in already lauched devices.

mas5acre 2010-01-01 20:31

Re: snpadragon have gpu?
 
hey thx was having a little bit of buyers remorse on my n900 and haven't even got it yet (hate new year's day or else it would be here!). I like emulators, and the n900 has something most phones don't, a physical keyboard as I think its near impossible to game without one and just with multi-touch.

Rushmore 2010-01-01 20:32

Re: snpadragon have gpu?
 
Quote:

Originally Posted by c0rt3x (Post 449176)
Both of the devices you mentioned has the QSD8250 chip from 2008, which is the inferior type. I'm sorry, but the later version has recently only reached production status. It'd be very unlikely to see it in already lauched devices.

Yes, version "2" would be using more clock to get things done;)

By version "2" I refer "2." in my post #2 and not a new version of the chip. Which would be "1.".

Most consumers will be oblivious though, since ignorance is bliss:)

Update:

In reference to post #9, I thought the other chip version had both? I am wrong once again.

c0rt3x 2010-01-01 20:35

Re: snpadragon have gpu?
 
***CORRECTION***

Both HTC HD2 and Google N1 have a dedicated DSP, but both lacks a GPU.

Source: http://pdadb.net/index.php?m=cpu&id=...dragon_qsd8250

mas5acre 2010-01-01 21:51

Re: snpadragon have gpu?
 
Quote:

Originally Posted by c0rt3x (Post 449183)
***CORRECTION***

Both HTC HD2 and Google N1 have a dedicated DSP, but both lacks a GPU.

Source: http://pdadb.net/index.php?m=cpu&id=...dragon_qsd8250

Looks like I chose the right phone... though, the next maemo, I'm worried about all this multitouch and making it smaller. I'd miss the keyboard for games as touchscreens don't quite cut it.

Rushmore 2010-01-01 22:56

Re: snpadragon have gpu?
 
Quote:

Originally Posted by mas5acre (Post 449283)
Looks like I chose the right phone... though, the next maemo, I'm worried about all this multitouch and making it smaller. I'd miss the keyboard for games as touchscreens don't quite cut it.

I agree. No KB is compelling for a few reasons to the makers:

1. Less parts and design issues to consider
2. Less things to fail
3. A lot of consumers think KB-free is "cool and sleek" looking- Just look at the Nexus as an example.
4. A secondary thing is less traffic for game emulators to bother with legal issues. This one is a stretch, but worth considering. Touch screen old school emulators suck for playability.

The trend is heading to KBless devices. Unless sales begin to lag, expect the trend to continue.

If I were the Overlord of the earth, I would ban KB-free devices, or at least make an add-on possible. Designers would walk the plank if not;)

Matan 2010-01-01 23:12

Re: snpadragon have gpu?
 
Quote:

Originally Posted by c0rt3x (Post 449155)
The 2009 Snapdragon family consists of one higher clocked stand-alone processor, while the N900's OMAP SoC includes a CPU/GPU/DSP combo. For calculations they're about equal, while the Snappy is obviously inferior for gaming and such. Remember that the DSP (digital signal processor) loads off the N900's main CPU (Cortex A8), while the Snap has to do everything by itself.

In what N900 games does the DSP really do anything?

Rushmore 2010-01-01 23:18

Re: snpadragon have gpu?
 
Quote:

Originally Posted by Matan (Post 449358)
In what N900 games does the DSP really do anything?

DSP would mainly be leveraged for video, so could have use for a PS1 emulator, but that would mean more space taken up;)

I prefer the ripped ones (no video or music), since less space taken up.

chowdahhead 2010-01-01 23:38

Re: snpadragon have gpu?
 
any games that have encoded audio which can be offloaded to the dsp would benefit too. ATM vorbis doesn't use the dsp but that could change soon.


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