Is the PS3 on track to deliver full specs?
- Thread starter Rash'
- Start date
AFAIK Cell is connected to XDR with 128 bit bus,RSX to vram via 128 bit bus also and Cell to RSX via flexio.
I remeber a dev saying that RSX doen't have a 256 bit bus but it could use both 128 bit busses but not with the result of using a 256 bit bus.
Mefisutoferesu
Regular
Aaaaaah, now THAT sounds like the basis for a reason to lower the frequency (the why was driving me nuts)... also, Xenos has over 300m transistors right? Does that mean RSX isn't the vanilla 7600-7900 we thought it was??
That strikes me as unlikely, but first define "way higher"?
G71 is 278M (3d Tables). Xenos + Daughter Die is, if I remember correctly, in the neighborhood of 335M.
Surely they did some "stuff" to G71, but enough to add 57M plus "way higher"?
That strikes me as unlikely, but first define "way higher"?
G71 is 278M (3d Tables). Xenos + Daughter Die is, if I remember correctly, in the neighborhood of 335M.
Surely they did some "stuff" to G71, but enough to add 57M plus "way higher"?
Plus, was it confirmed they were 'ripping out' the Purevideo stuff? (~30M transistors)
My guess would be that either RSX is G80 based or it's a dual GPU akin to the 7900 GX2 or 7950 GX2.
I'd stop guessing if I were you!
Mefisutoferesu
Regular
That seriously doesn't seem likely. There's no way we're getting double the RAM, and having to feed 2 GPUs with an already limited bandwidth of the current configuration is just a massive bottleneck waiting to happen. Also, I think G80 is too far off for any sort of use. Where's smm, I'd love he could clear this up.
They could've put another bank of RAM in there. Hey, something has to explain the memory downgrade.
That strikes me as unlikely, but first define "way higher"?
G71 is 278M (3d Tables). Xenos + Daughter Die is, if I remember correctly, in the neighborhood of 335M.
Surely they did some "stuff" to G71, but enough to add 57M plus "way higher"?
And consider G71 is just under 200 mm2 chip. Its approaching the low yield region. Though I remember Kutaragi saying that RSX like Cell, is going to have some part disable for yield reasons.
Another possibility is that RSX is base on G70 rather than G71. So the tuning and the trimming NV did to G71 from G70, is not done to RSX. This is a possibility considering PS3 was going to launch last Spring initially. And like Cell, its possible that RSX is already in production sometime ago.
ShootMyMonkey
Veteran
What I said was that the official figures have little to do with the real transistor count and RSX is way more loaded on the "uncounted" transistors -- the original thread was part of this whole speculation on "mystery transistors" because of the difference between RSX and a regular G71. IIRC, it was also in response to some really outlandish guess on someone else's part (I don't even remember or care to check what it was).
GPUs tend to have a many times more conservative "stated" transistor count than most other components -- a figure of ~300 million is rarely anywhere near the real figure. Also, officially, I think a few extra functional parts of RSX are officially not counted because they're not graphical. If Xenos' eDRAM were not a separate die, there's a good chance its transistors wouldn't be counted at all because it's just one of those things.
GPUs tend to have a many times more conservative "stated" transistor count than most other components -- a figure of ~300 million is rarely anywhere near the real figure
. Also, officially, I think a few extra functional parts of RSX are officially not counted because they're not graphical. If Xenos' eDRAM were not a separate die, there's a good chance its transistors wouldn't be counted at all because it's just one of those things.ShootMyMonkey
Veteran
He gets a little insane. The moment he rediscovered that post, he went on this screaming rampage of "OMG!!! We have absolute confirmation now that RSX has an additional 20 million transistors! No wait... 35 million! Yes, that's right, we have indisputable proof that RSX has an additional 60 million transistors. I think we've proven that these additional 110 million transistors will make RSX totally rock."
The guy gives me a headache.
I can understand that .
and XB people are already quoting your post on several forums
i'ám looking forward to your cell article BTW
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Such as ?
What ? Careful now, putting your statements together, you'll make it sound like RSX has eDRAM.
I can understand that .
and XB people are already quoting your post on several forums
Well, that's to be expected honestly... and I'm sure I'm being both praised and flamed in equal measure.
I knew I was putting myself out in 'lightening rod' territory with this, especially actually confirming Charlie's garbage, but I mean - his voice can simply not be allowed to set the tone, and I'm not under NDA, so...
People have to understand both that a downgrade is indeed possible *and* that it won't mean too much to PS3 in the end. To read the Inq you'd think the system is done for.
I mean...
What other spec change has there been? The answer: none.
