Xbox 720 Is Similar to PS4, Ubisoft Says

[Machiavellian]

ethomaz said:

Machiavellian said:

DIfference is one is performing 64 threads while the other is doing 32.  As I stated this is what the poster draws his conclusion that the 12 SC or Shared Cores he likes to called it is actually an Array of 4 CU cores instead of just being one CU core.

No. You are reading wrong... the memory mapping is 64bits not 64 threads and each CU have 64 threads.

VGLeaks just use wrong terms.

- as SMID is CU (in vgleak term)

 - each SMID = 64 thread lockstep (Vgleak term) 
 - each CU : 16 Operation /cycle across 4 ALU = 64 ALU per cycle/lockstep

 - in Vgleak term Thread = ALU
 - in vgleak 1 Operation = 4 Thread

Edit - Fixed.

 

Ok that makes sense.  I just did some more digging and see that vgLeaks is confusing a SIMD with a CU because here is what they say about the PS4 arch in this artical.

http://www.vgleaks.com/worl... 

UPDATE: some people is confused about the GPU, here you have more info about it:

Each CU contains dedicated:

- ALU (32 64-bit operations per cycle)

This is from vgleaks concerning the PS4 GPU specs.  From there statement they are saying that the ALU executes 32 operations per CPU clock cycle.  Which would mean either the CU unit on the PS4 has only 2 SIMD or they were just wrong in their assessment.