RE: IBM Chip powers new Xbox

["David Delisi" <daviddel@xxxxxxxxxxxxx>]

The Xbox 360 uses Three 3.2 GHz PowerPC cores.  They have a shared 1MB
L2 cache, 8-way set associative.  Each core features 2-issue per cycle,
in-order, decoupled Vector/Scalar issue queue and 2 symmetric fine grain
hardware threads.

The PowerPC data streaming allows high bandwidth data streaming support
with minimal cache thrashing.  This is accomplished with 128B cache line
size (all caches).  To be clear, this is a customized version of the
chip designed specifically for graphic intensive applications rather
than workloads.  

 
David deLisi 
Microsoft Corporation 

-----Original Message-----
From: midrange-l-bounces+daviddel=microsoft.com@xxxxxxxxxxxx
[mailto:midrange-l-bounces+daviddel=microsoft.com@xxxxxxxxxxxx] On
Behalf Of Steve.Hinrichs@xxxxxxxxxxxxxxx
Sent: Tuesday, November 08, 2005 5:47 AM
To: midrange-l@xxxxxxxxxxxx
Subject: IBM Chip powers new Xbox


Didn't Frank Soltis talk about this in a round about way?

200 engineers from IBM's Engineering and Technology Services unit worked
on
it.  They started with the PowerPC core, the base chip for iSeries and
pSeries servers, and revved up is processing speed.  Then they coupled 3
chips together and pushed the graphics processing portion of the PowerPC
chip to 128 bits from 64.