New Cruncher....Mabey

[jinydu]

Originally Posted by dsouza123

The 1 teraflop is total system floating point performance, most of it is the
ATI GPU.

I've read the PS3 (Playstation 3) is 2 teraflops
with 218 gigaflops from the CELL processing unit
(1 PowerPC @ 3.2Ghz and 8 specialized SPUs, 7 + 1 redundant).
The rest from the NVidia RSX (specialized G70).
This is also single precision (32 bit) floating point.

Also read the PS3 has double the FP of XBOX 360,
whether it is only for the total system,
or also extends to the CPU part not sure.

The only concrete number for the CPUs, XBOX 360 spec mentions
for CPU math 9 billion dot product operations per second.

I figure the 3 CPUs in the XBOX 360 can do 96 gigaflops.
Each CPU has 1 vector unit per core
which can do 8 fp per cycle (multiply-add).
Each CPU can also do 2 fp per cycle in the scalar fp unit.
Total 10 fp per cycle * 3 CPUs * 3.2 ghz = 96 gigaflops.

That still seems vastly more powerful than personal computers. If I remember correctly, there was a thread quite some time ago where I measured the number of FLOPS for a P4, 3GHz computer, and I think it was 4 gigaflops, or something like that.

EDIT: Here it is:

http://www.mersenneforum.org/showthr...ight=gigaflops

4.110 Gigaflops for the 3.055GHz P4. This means that the XBOX has over 23 times more power than a P4 desktop computer!

[moo]

The xbox might have a new flaw kind of like the original xbox... the game mechwarrior has a error were you load on a speical save file which allows you to install linux on your xbox. even if we cant get double precision we might be able to doing something cutting performance in half but allowing us to emulate double precision how well it might still need to be found.

[dsouza123]

I know the 32 per CPU of the XBOX 360 seems high, but
remember this is single precision 32 bit floating point.

The normally quoted gigaflops are for double precision 64 bit floating point.
So a value for 32 bit fp is needed to put the numbers in perspective.

With a CELL processor clocked at 4 GHz using all 8 SPEs
it does 256 gigaflops SP but 26 DP max. No mention of the Power core.

On the Top 500 a 2560 Opteron CPU cluster did 8061 gigaflops DP
so 3.14 for one CPU (2.2 GHz).

Real DP FP numbers from IBM 4 way p5 570 (1.90 GHz)
27.52 so one dual core would be 6.88 and three 20.64 DP.