Xbox One (Durango) Technical hardware investigation

[BeyondTed]

Two Antennas? Who Cares?

Here are the real questions!!! (Sorry Shift/Mods, Could Not Resist...)

Where Is Chipworks?!?

We want to compare the PS4 Jaguar images to the Xbox One "Custom (AMD) Processor" and see what is added/changed.

We want to compare the HP to HPM process cross sections of the transistors.

We want to see the Xbox One CU image next to the PS4 CU. The same CU? Added stuff? Native DP or just SP/CGN?

How about that eSRAM? 8T? 6T? Which 6T? Performance? Low Power? What??? 1T??? Then what the #$%^ else makes up the rest of the 5 BILLION transistors?

Any extra hardware directly connect to the eSRAM?



Anyone else want to see an Xray of a stacked die/3D/TVS design? [What?!? Is he joking? Serious? Sarcasm?!?]



Where is Chipworks? Kanata? Nepean? Maybe downtown? Gone over to Ottawa-Hull...? At the local bar? WHERE ARE THE XBOX ONE SoC IMAGES? On vacation today?

If I still lived there I would drive over and ask what the #$%^ are you people doing? (Likely drinking at this time on Friday. I guess Chipworks forgot to PRE-ORDER!!!! Or maybe their Xbox One actually works and they don't want to sacrifice it while their PS4 was DOA (Just kidding, not serious, please calm down. JUST A JOKE.))



Because matching VGLEAKS would be far too boring. And if they match VGLEAKS they must fire all of SIARCH immediately.



[I wonder what I am going to be dinged for this time?]

 

[AlNom]

http://www.chipworks.com/en/technical-competitive-analysis/resources/blog/inside-the-xbox-one/

 

[fellix]

2560KB extra SRAM?

 

[MrFox]

Ha! Yes it looks like the missing ram from the 47MB that didn't add up? Now what is it for? Why is it between the two cores?

The 32MB is somewhere around 70 mm2

 

[Betanumerical]

Ha! Yes it looks like the missing ram from the 47MB that didn't add up? Now what is it for? Why is it between the two cores?

The 32MB is somewhere around 70 mm2

SHAPE?.

 

[McHuj]

So basically it looks like the SRAM consumes close the the space of the 14 CU's.

I wonder what the other SRAM block is for, if it was redundancy, I would expect it to be with the other two blocks.

Maybe for Kinect data? Or for the scaler?

 

[Scott_Arm]

Weird. Wasn't expecting that. Must be tied to the CPUs. Is it enough to act as another layer of shared CPU cache?

 

[Scott_Arm]

SHAPE?.

Shape is supposed to have a bunch of memory. I don't think the docs ever said how much.

 

[dobwal]

2560KB extra SRAM?

I guess that some of the 47 mb of SRAM thats unaccounted for.

 

[McHuj]

None of the leaked docs seemed to mention this, so I would guess this is something hidden behind an API/not directly accessible by the programmer.

 

[Betanumerical]

None of the leaked docs seemed to mention this, so I would guess this is something hidden behind an API/not directly accessible by the programmer.

It also seams to be attached to some logic that is not the CPU's.

 

[dobwal]

Shape is supposed to have a bunch of memory. I don't think the docs ever said how much.

Is all that logic on the i/o bus sharing one sram pool?

If I thought I was looking at an regular AMD chip I would mistake it for the NB, Crossbar and a small L3 cache, given that are components that usually sits between AMD cpu modules.

 

[fellix]

There's a fair amount of logic attached to this SRAM pool, with its very own clock generator:

 

[3dilettante]

That region is where the north bridge is, which is clocked independently from the x86 clusters.

 

[loekf]

That region is where the north bridge is, which is clocked independently from the x86 clusters.

So we've 3 PLLs (clock gens). One for each Jaguar cluster and (like Sony) a third for peripherals (guess SDRAM + on-chip bus). GPU is a fraction of the CPU clock, e.g. CPU clock / 2.

Interesting to see that both companes have 2 CUs redundant.. XB1 = 14 -2 = 12, PS4 = 20 -2 = 18.

 

[loekf]

Shape is supposed to have a bunch of memory. I don't think the docs ever said how much.

47 MB sounds an awfull lot for an audio processor. I would expect KBs for cache or scratch memory. Maybe some of it is for lipsync processing ?

 

[AlphaWolf]

47MB is the total on die supposedly, not the amount for audio.

 

[Gipsel]

http://i.imgur.com/YsxT4fN.jpg

http://www.chipworks.com/en/technical-competitive-analysis/resources/blog/inside-the-xbox-one/

On same scale as Orbis:

That region is where the north bridge is, which is clocked independently from the x86 clusters.

Yes. That structure can be found in Orbis, too.

 

[Silent_Buddha]

On same scale as Orbis:

Yes. That structure can be found in Orbis, too.

Looking at the Jaguar cores in each they look almost identical except for the extra bits in the corner of each Durango block. The same area for Orbis is blank.

What could that be? Would each CPU block have it's own audio core? Or would that be something else?

Regards,
SB

 

[fellix]

Looking at the Jaguar cores in each they look almost identical except for the extra bits in the corner of each Durango block. The same area for Orbis is blank.

What could that be? Would each CPU block have it's own audio core? Or would that be something else?

Regards,
SB

Those are some kind of SRAM cells, also visible in the Kabini shot:

http://i43.tinypic.com/etsmlg.jpg