New Cruncher....Mabey

moo · 2005-05-18, 00:52

Well if there are any gamers that are here they know what the xbox 360 now the specs
http://xbox.gamespy.com/xbox-360/per.../613063p2.html
when I was reading into the specs i noticed something.... There packing one taraflop into the thing thats a lot of power. Can this be controled some how.

georgekh · 2005-05-18, 01:53

yea i was wondering too actually since its gonna have 3 PowerPC at 3.2ghz, that maybe we can break in to it and run Prime95 :)

rogue · 2005-05-18, 02:11

Quote:

Originally Posted by georgekh

yea i was wondering too actually since its gonna have 3 PowerPC at 3.2ghz, that maybe we can break in to it and run Prime95 :)

Not going to happen. You have to run MLucas or GLucas on the PowerPC. On a stock G5 at 2.5 Ghz you can get close to 50% of the speed of Prime95 on a x86 box of a similar speed.

moo · 2005-05-18, 02:13

... only difference is this is a speical power pc .... were talking 3 cores able to run 2 threads each and clocked at 3.2 ghz
can gluclus run and connect to primenet....

Mystwalker · 2005-05-18, 08:00

Maybe it's not good at LL testing, but one can try to do TF, for example. Or some other math-related, but GIMPS-unrelated, work...

rogue · 2005-05-18, 12:40

Quote:

Originally Posted by moo

... only difference is this is a speical power pc .... were talking 3 cores able to run 2 threads each and clocked at 3.2 ghz
can gluclus run and connect to primenet....

AFAIK, neither GLucas or MLucas can connect to PrimeNet. Rumor has it that the next version of the server would support connectivity from a GLucas or MLucas client.

There is a multi-threaded version of GLucas, that might kick some butt on those processors. The multi-threaded version of GLucas was used to verify the primality of the recent Mersenne Primes.

Peter Nelson · 2005-05-19, 01:01

Moo, I like your thinking.

If MS decides to loss-lead the console in hope of selling games at profit, this hardware may be even better value for us non-gamers!

Of course it depends how locked down the hardware platform is. Maybe we can get our own code to run, maybe not. We shall see! As the processor is custom they could have put some crypto in there to stop nonapproved code execution.

Overall performance sounds impressive but....

To quote pg1 of your link...

"Holmdahl then showed us some rather cool visual aids to help us understand a little better exactly how much hard work has gone into the engineering and design of the machine. We checked out the final mainboard of the 360, complete with a water-cooled CPU, GPU, and memory modules installed. "

Erm, did he say WATER COOLED?

I hope these things don't leak at all or those chips may fry!

jinydu · 2005-05-19, 01:07

One teraflop?! 20 xbox's > GIMPS (tens of thousands of computers)?!

I find that hard to believe...

Mystwalker · 2005-05-19, 09:48

I've read that MS decided to state GFLOPS with single precision only, whereas usually, double precision is taken...

rogue · 2005-05-19, 12:56

Quote:

Originally Posted by Mystwalker

I've read that MS decided to state GFLOPS with single precision only, whereas usually, double precision is taken...

I believe there is an AltiVec unit in the CPU. AltiVec only handles single precision.

dsouza123 · 2005-05-19, 19:21

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.

2005-05-18, 00:52	#1
moo Jul 2004 Nowhere 1451₈ Posts	New Cruncher....Mabey Well if there are any gamers that are here they know what the xbox 360 now the specs http://xbox.gamespy.com/xbox-360/per.../613063p2.html when I was reading into the specs i noticed something.... There packing one taraflop into the thing thats a lot of power. Can this be controled some how.

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2005-05-18, 01:53	#2
georgekh Oct 2004 2·3³ Posts	yea i was wondering too actually since its gonna have 3 PowerPC at 3.2ghz, that maybe we can break in to it and run Prime95 :)

2005-05-18, 02:13	#4
moo Jul 2004 Nowhere 809 Posts	... only difference is this is a speical power pc .... were talking 3 cores able to run 2 threads each and clocked at 3.2 ghz can gluclus run and connect to primenet....

2005-05-18, 08:00	#5
Mystwalker Jul 2004 Potsdam, Germany 3·277 Posts	Maybe it's not good at LL testing, but one can try to do TF, for example. Or some other math-related, but GIMPS-unrelated, work...

2005-05-19, 01:01	#7
Peter Nelson Oct 2004 23² Posts	Moo, I like your thinking. If MS decides to loss-lead the console in hope of selling games at profit, this hardware may be even better value for us non-gamers! Of course it depends how locked down the hardware platform is. Maybe we can get our own code to run, maybe not. We shall see! As the processor is custom they could have put some crypto in there to stop nonapproved code execution. Overall performance sounds impressive but.... To quote pg1 of your link... "Holmdahl then showed us some rather cool visual aids to help us understand a little better exactly how much hard work has gone into the engineering and design of the machine. We checked out the final mainboard of the 360, complete with a water-cooled CPU, GPU, and memory modules installed. " Erm, did he say WATER COOLED? I hope these things don't leak at all or those chips may fry!

2005-05-19, 01:07	#8
jinydu Dec 2003 Hopefully Near M48 11011011110₂ Posts	One teraflop?! 20 xbox's > GIMPS (tens of thousands of computers)?! I find that hard to believe...

2005-05-19, 09:48	#9
Mystwalker Jul 2004 Potsdam, Germany 3·277 Posts	I've read that MS decided to state GFLOPS with single precision only, whereas usually, double precision is taken...

2005-05-19, 19:21	#11
dsouza123 Sep 2002 2·331 Posts	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.