JRPGfan said:
Akeos look here:
320 SP theory:
"The issue with that Latte linked spec that you and OryoN discussed is that it has a serious flow in its numbers WRT the VLIW5 rumors: by the quoted numbers, Latte cannot be a VLIW5."
"Five CUs (compute units, AKA SIMD units) and 320 SPs (shader processors, AKA processing elements) means each CU should host 64 PEs. 64 is not a multiple of 5, and VLIW5 works with quintets of PEs. Not to mention the consensus is that there are 8 CUs on the die shot, and that's one of the few things there's a consensus about"
qoute - Blu Neogaf.
The problem is Neogaf has members that are devs, or nintendo people.
They know its VLIW5, a member (BG) that knows said it was so.
But that doesnt fit with the 320 number.
So it cant have those 320 cores (that is my understanding of reading this, maybe its wrong?)
the 352 gflop number you quote comes from:
320 stream proccessors (cores) x 2 x 550mhz = 352,000 flops (352 gflops).
But we "know" thanks to BG from neogaf that it uses VLIW5.
Which means that 320 stream proccessors isnt TRUE! (read blu's comment at the top)
So all those sites saying its 352 gflop are wrong.
I have looked through the last few pages on a 238+ page long thread on neogaf looking for some way to prove this. Theres probably some better than what I found but... yeah that ll take some time to look through.
If you feel up to it:
http://www.neogaf.com/forum/showthread.php?t=511628&page=238
Buttom line:
Eggs heads on Neogaf all agree its actually 160 stream proccessors (not 320), and that it thus only has 176 Gflops.
I believe them.
edit:
extra:
Supposedly the red ones are the ALUs (20 steam processors each) and the blue's the TMU.
It matchs up (from what I understand).
20/5 = 4.
8 ALUs of 20 steam proccessors = 160
160 "cores" running 550mhz = 160 x 2 x 550 = 176,000 (176 Gflops)
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Where they go wrong in their assumptions is all of the unaccounted for parts of the chip which no one on NeoGaf could tell what they did, besides being fixed function. If you believe them to be them to be fixed functions then how do you just throw those processing abilities away and not include them in the theoretical number?
I believe they said 35%- 40% of the chip they can't iron down exactly what it does, but they know the latte is more efficient than the previous 7th generation consoles... This was the main reason why the 176 Gflops was always being challenged.
