[version]

[ERP]

Random guesses on your part of course.

[Ooh-videogames]

Is this speculation on your part.

[j^aws]

Please don't take any offence...but I've worked out why you're name is 'version'...'coz these must be your 5th or 6th 'versions' of Xenon/ PS3 but the 1st for Rev! :P

[rusty]

768mb of xdr ram in total for ps3?

if that is true the ps3 really is going to cost a fortune with everything else that it's supposed to have.

don't see it happening personally purely from a financial standpoint... i'd be happilly suprised to see 512 xdr in there to be honest.

[ziutek]

What do 32 SIMD units mean in the Xenon part?
Does this mean R500 does not have unified shaders?

[aaaaa00]

Woohoo, lets play "random made up spec wars"!

[BigGamer X]

Originally Posted by aaaaa00

Woohoo, lets play "random made up spec wars"!

800 Petaherz 128 Bit, 64 Core CPU. Storage device 20 Petabytes. 1 PB/sec transfer rate. 1.5 Petabyte of RAM. No need for GPU or PPU. Emulates Ps3, XBOX 2, Revolution with ease, and it's own games make these consoles look like Atari 2600.

[Teasy]

Can't see Revolution having less ram then XBox 2 unless it uses lower latency ram. Like GC did with its 1T-Sram.

Just to check the G5 is a dual core processor right? So basically your saying that you think Revolution will have a 4 core 3Ghz PPC CPU with 2MB cache vs a 3 core 3Ghz PPC CPU with 1MB cache for XBox 2? That would suprise a few people here if it happened. Then again, who cares if this is just guess work

[Shifty Geezer]

Anything less than a Googleplex of flops and I'm going home.

[McFly]

Originally Posted by Teasy

Just to check the G5 is a dual core processor right?

No. Most G5 machines have two G5 CPU's in it, but the CPU itself is single core.

Fredi

[Teasy]

I wonder why version says 3 PPC for XBox 2 and 2 G5's for Revolution then? Why not just say 2 PPC? Or is there some other difference between a standard PowerPC and a G5?

[aaaaa00]

Originally Posted by Teasy

I wonder why version says 3 PPC for XBox 2 and 2 G5's for Revolution then? Why not just say 2 PPC? Or is there some other difference between a standard PowerPC and a G5?

Like Pentium4, G5 is a desktop CPU optimized for desktop spaghetti code software.

It has out-of-order execution (instead of in-order), 5 dispatch per cycle (instead of 2), and is bigger in chip area.

Console CPUs tended to have a different focus and different performance characteristics. (Xbox used a desktop CPU - Pentium 3, and it was the only console last generation to do so.)

[McFly]

And don't forget:



So Nintendo would have to pay a little bit to Apple as well.

Fredi

[randycat99]

Has anybody applied the DeadmeatGA bandwidth analysis technique to this XB2 configuration? (you know- the thing where a certain bandwidth to main memory can only achieve x amount of FLOPs or something like that?) That should be a hoot!

[Andy]

Originally Posted by aaaaa00

Console CPUs tended to have a different focus and different performance characteristics. (Xbox used a desktop CPU - Pentium 3, and it was the only console last generation to do so.)

Actually the processor in XBox is a custom Pentium 3/Celeron Hybrid, so it wasn't completely a desktop CPU as it was customised for XBox.

[randycat99]

I dunno if you want to go "there". Technically, it was a spittin' image to essentially the cutdown P3 that was used in Windows laptops of the era- a Celeron rigged up for the mobile market.

[Fox5]

Originally Posted by aaaaa00

Like Pentium4, G5 is a desktop CPU optimized for desktop spaghetti code software.

It has out-of-order execution (instead of in-order), 5 dispatch per cycle (instead of 2), and is bigger in chip area.

Console CPUs tended to have a different focus and different performance characteristics. (Xbox used a desktop CPU - Pentium 3, and it was the only console last generation to do so.)

How about the Gamecube's G3 derived Gekko?

[Andy]

Originally Posted by randycat99

I dunno if you want to go "there". Technically, it was a spittin' image to essentially the cutdown P3 that was used in Windows laptops of the era- a Celeron rigged up for the mobile market.

From what I've read, the reason it is a P3/Celeron hybrid and not a straight out P3, is that it still has a coppermine core, which is what Celeron II used IIRC. Why Microsoft are alllowed to market it as a P3 is because the XBox processor gives a 10% speed increase over its celeron equivilent.

Like I said this is what I've read, if you have evidence to prove otherwise, then please show me.

[Fox5]

Originally Posted by Andy

From what I've read, the reason it is a P3/Celeron hybrid and not a straight out P3, is that it still has a coppermine core, which is what Celeron II used IIRC. Why Microsoft are alllowed to market it as a P3 is because the XBox processor gives a 10% speed increase over its celeron equivilent.

Like I said this is what I've read, if you have evidence to prove otherwise, then please show me.

I thought it was something like Celerons of the time had half the cache speed in addition to half the cache, while the xcpu has full speed cache but only half the cache.(and was identicle to a mobile pentium 3)

[aaaaa00]

Originally Posted by Fox5

How about the Gamecube's G3 derived Gekko?

Whoops. I was under the impression that Gekko was in-order, but ok, maybe I'm wrong.

[j^aws]

^^ The point aaaaa00 is trying to make is that desktop CPUs take advantage of out-of-order CPUs because of unoptimised, crappy, spagetti code. But for a specialised games consoles, wasted transistors are not necessarily needed for out-of-order logic in a CPU. Finely tuned code can be crafted for in-order CPUs, thereby saving transistors for cost or increasing them for more performance.

In this case, all three consoles have a good chance of sharing tech from IBMs in-order PPC core for CELLs PPE, Xenons cores and Revs (but without the VMX units, IMO).

[darkblu]

Originally Posted by Andy

Actually the processor in XBox is a custom Pentium 3/Celeron Hybrid, so it wasn't completely a desktop CPU as it was customised for XBox.

there were 2 p3 cores, the coppermine and the tualatin, not counting the cache/bus-downgraded celeron variations. the xcpu being yet another variation of the cache/bus configurations, it had nothing not met in the rest of the p3 family. so i think one can safely put the xcpu with the rest of the desktop (read: multi-purpose) line.

[aaaaa00]

Originally Posted by Jaws

^^ The point aaaaa00 is trying to make is that desktop CPUs take advantage of out-of-order CPUs because of unoptimised, crappy, spagetti code. But for a specialised games consoles, wasted transistors are not necessarily needed for out-of-order logic in a CPU. Finely tuned code can be crafted for in-order CPUs, thereby saving transistors for cost or increasing them for more performance.

To be clear, this is not necessarily a bad thing -- using a desktop CPU makes developer's lives a lot easier. Maybe you trade off some potential performance and/or cost, but the performance you do get is easier to extract.

[darkblu]

Originally Posted by aaaaa00

To be clear, this is not necessarily a bad thing -- using a desktop CPU makes developer's lives a lot easier. Maybe you trade off some potential performance and/or cost, but the performance you do get is easier to extract.

i can still remember the time when out-of-order was considered a feature for the server market.. it was somewhere about the ppro time : )