More info about RSX from NVIDIA
- Thread starter nAo
- Start date
No PureVideo, no PC bloat.
What that will translate into in converted transistors, who knows...?
BUT, Kutagari did seem to imply that RSX will have some pipelines disabled in RSX, just as Cell has one SPE disabled, for 'aesthetic' and fabbing reasons.
Anyway so I take this to mean either 24 pixel pipes with four disabled or 32 pixel pipes with four disabled. Also, they may change the number and/or presence of some of the vertex pipes, depending on any work they may decide to offload to Cell. I could see 4 vertex pipes being enough for the day to day, with Cell there when needed for an extra boost.
What that will translate into in converted transistors, who knows...?
BUT, Kutagari did seem to imply that RSX will have some pipelines disabled in RSX, just as Cell has one SPE disabled, for 'aesthetic' and fabbing reasons.
Anyway so I take this to mean either 24 pixel pipes with four disabled or 32 pixel pipes with four disabled. Also, they may change the number and/or presence of some of the vertex pipes, depending on any work they may decide to offload to Cell. I could see 4 vertex pipes being enough for the day to day, with Cell there when needed for an extra boost.
jvd said:
As far as pipe configuration is concerned, nothing has been mentioned.
I'm beginning to think that at least as of E3, if not as of now, Sony still wasn't/isn't sure what the final config of RSX will be. I guess they're waiting to see where their early yields take them.
It's an interesting question, though, if they're starting with 32 pipes in the silicon or 24. I think Dave was pointing more at the discrepancy in die size than transistor count with his article (or is the die size "normal" for the transistor counts being given?). Is it possible they're only counting "active" transistors with the 7800?
As for a less traditional configuration in RSX, a heavier weighting toward pixel shading etc. I couldn't see them removing vertex shaders altogether. Devs are obviously already working under the assumption they'll be there (at least judging by Epics comments - their E3 PS3 demo was only running on the PPE, hence no SPEs for geometry, and their most recent comments on SPE use mentions nothing of vertex processing). Maybe they could go with 6 and invest those transistors elsewhere.
Chalnoth said:
I keep forgetting that they did give the 136 shader ops/sec figure, which would tie in with a 24-pipe design (?) Unless that's their bare minimum with room for boosting depending on yields (very unlikely, of course..)
It's perplexing, then, why they won't talk more about RSX. I had thought the lack of detail at E3 was the maintain competitive secrecy for G70, but now the cat's out of the bag..?
Chalnoth said:
Assuming they synched with Sony's PR on it, why not?
Perhaps Sony have different plans though, TGS related plans as suggested above. I guess I'm just disappointed we're not hearing more post-G70 I guess also if RSX isn't yet finished they may be hesitant to talk further about it. It's been suggested that it may not be finished till Sept, which might tie in nicely with more detail arriving at TGS.
wco81 said:
TGS is in September - and if there are any surprises left, I definitely see that being the place they are revealed. 360 will already be in production at that point, on track to meet an October/November launch. That would give Sony the dual advantage of preventing Microsoft from responding in a hardware fashion and possibly dulling 360 momentum pre-launch, most importantly in Japan I imagine at this point.
I'm not sure myself if there's really any big surprises Sony could pull at this point, but hopefully something positive on the graphics front and some more explanation as to their online and storage strategies.
scooby_dooby
Legend
All I know is MS beter bring some sweet CGI clips to TGS.
Don't let Sony embaress them again.
Don't let Sony embaress them again.
Titanio said:Chalnoth said:
I keep forgetting that they did give the 136 shader ops/sec figure, which would tie in with a 24-pipe design (?) Unless that's their bare minimum with room for boosting depending on yields (very unlikely, of course..)
It's perplexing, then, why they won't talk more about RSX. I had thought the lack of detail at E3 was the maintain competitive secrecy for G70, but now the cat's out of the bag..?
With the G70, VS and PS units, the 136 Shops/cycle = 136 instructions/ cycle.
However, the G70 is capable of 56 DOTs/cycle (56 vec4 units) but the E3 info suggested the RSX did 52 DOTs/cycle. So something doesn't add up there.
If the above was true then the RSX ~ 4 VS + 24 PS units (52 DOTs/cycle, 52 vec4, 136 inst./cycle) but it still has ~ 300 mil transistors. This would suggest further additions/modifications, e.g. 24 ROPs, more cache, more FP32 upgrades or perhaps a Geomerty Shader! 8)
At the very least, they should've removed that redundant video core and maybe H/W clipping for all GS fans!
EDIT:
52 DOTs/cycle was derived here,
http://www.beyond3d.com/forum/viewtopic.php?p=536528#536528
osvaldomartins
Newcomer
therealskywolf
Regular
Maybe sony just doesnt want to pass the notion to the world that the RSX is just a off the shelf GPU, something that they criticized MS for with the Xbox?
Are we also forgetting that the main star of show is Cell? And sony hasnt had any prob talking about it, "because its so great", and maybe there isnt that much to know about the RSx?
I think that if there was anything out of this world, like some completelly new feature, something totally wow about the RSx they would have said it at E3.
Are we forgetting that the Nvidia guy went there to talk about the RSx? If the RSx had more Pixel Pipes than G70 dont you guys think Sony would be all "More pipes than next gen GPU"?
I mean they didnt had any prob talking about its greater speed, the uber Hdr 128, the huge bandwith.....Pixel Shader 3 if i remember.
I think we are expecting something new, something unexpected, but i think we know almost everything by now, the only thing left to know is how RSx interacts with Cell (Maybe some of you already know).
Are we also forgetting that the main star of show is Cell? And sony hasnt had any prob talking about it, "because its so great", and maybe there isnt that much to know about the RSx?
I think that if there was anything out of this world, like some completelly new feature, something totally wow about the RSx they would have said it at E3.
Are we forgetting that the Nvidia guy went there to talk about the RSx? If the RSx had more Pixel Pipes than G70 dont you guys think Sony would be all "More pipes than next gen GPU"?
I mean they didnt had any prob talking about its greater speed, the uber Hdr 128, the huge bandwith.....Pixel Shader 3 if i remember.
I think we are expecting something new, something unexpected, but i think we know almost everything by now, the only thing left to know is how RSx interacts with Cell (Maybe some of you already know).
randycat99
Veteran
...but what if it has gyroscopes inside?
I'm laughing at those who claim that they are holding a secret as not to tip MS off. There's absolutely nothing that MS can do at this point in terms of hardware redesign if they want to make a holiday launch. It's not like Sony is going to reveal something that will cause MS to throw their hands up and say screw it, we'll launch in a couple years as we redesign the hardware.