Microsoft claims 200GB/s of bandwidth, gets caught fudging numbers

Between this and the performance will be, "the same if not better," comment about using ddr3 ram, MS must really think its consumers aren't well informed. (And are playing heavily into it)

I hope they're wrong, but maybe they know exactly what they're doing with this vague and misinforming campaign.
 
Why would they even claim 200GB/s. Thats way down on what they claimed last generation (this is from their PR release in E3 2005):
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This is golden.
 
MS really shot themselves in the foot. Actually, it's more like... they sawed off both feet and began sucking on the bloody stumps.
 
Edit:Read that wrong.

From MN

One of the great things about working at Xbox is that we have some of the smartest people in the world working on the Xbox 360. When Sony came announced the PS3, along with the product specs some of our team started looking at some of the numbers to see what they mean. Floating Point, shaders, bandwidth….what does it all mean. Clearly there are some numbers and stats that mean more to gaming then others, so the team cranked out some facts for everyone to absorb. Our world class technology team looked at the numbers and claims and decided to do what everyone else does: compare them to the PS3. The difference it that these guys are uniquely qualified to do so, and can cut through the smoke and mirrors to see what the real deal is. To that end, I present this summary, which I have broken up into four parts to make it more RSS Reader friendly.

Warning: Some of this stuff may make your head hurt, but these are the facts as they stand right now. Enjoy the read:

SUMMARY
Now that the Xbox 360 and PlayStation 3 specifications have been announced, it is possible to do a real world performance comparison of the two systems.

There are three critical performance aspects of a console:
? Central Processing Unit (CPU) performance.
o The Xbox 360 CPU architecture has three times the general purpose processing power of the Cell.
? Graphics Processing Unit (GPU) performance
o The Xbox 360 GPU design is more flexible and it has more processing power than the PS3 GPU.
? Memory System Bandwidth
o The memory system bandwidth in Xbox 360 exceeds the PS3′s by five times.

Xbox 360 has 278.4 GB/s of memory system bandwidth. The PS3 has less than one-fifth of Xbox 360′s (48 GB/s) of total memory system bandwidth.
http://majornelson.com/2005/05/20/xbox-360-vs-ps3-part-1-of-4/
 
How much bandwidth do you actually need for a 1080p game at 30fps given that a lot of the textures and geometry are going to be exactly the same from frame to frame?
 
You know, I used to think Major Nelson was an ok guy.

That is some sleezy shilling right there to the point of outright deception.
 
Don't worry, Microsoft.

That point will go over the head of 90% of gamers and 99% of games journalists.

Agreed, also its irrelevant to the end result, the games will look fine. They should have taken the Apple approach and not mentioned any specs.
 
There's no one calculation/number. Every game will be different.

I still think the bandwidth provided by Xbox One should be more then enough.

Not that it matters a great deal to me at the moment. Unless MS has an abolutely stunning E3 and demonstrates some incredible graphics and sorts out this used game bull then I'm not buying a Xbox One. It's going to be PS4 for next gen.
 
Buy a new calculator.

A 53 MB file split between eSRAM and main memory can be accessed @182GB/s. That's what the eSRAM is here for.

32MB@102GB/s = 0.000292180s
21.329MB@68GB/s = 0.000292120s

The buses are separate so they work simultaneously. So the entire 53MB file is done in 0.000292180s (the largest of the two times) and that gives you an rate @ 182.5GB/s.

My calculator seems fine from my standpoint.
 
A 53 MB file split between eSRAM and main memory can be accessed @182GB/s. That's what the eSRAM is here for.

32MB@102GB/s = 0.000292180s
21.329MB@68GB/s = 0.000292120s

The buses are separate so they work simultaneously. So the entire 53MB file is done in 0.000292180s (the largest of the two times) and that gives you an rate @ 182.5GB/s.

My calculator seems fine from my standpoint.

Can I ask why you picked a 53MB file?
 
It's quite clear MS recognises a substantial hardware difference exists this time. Last time they were eager to put FUD out, some true, some misleading - but they were confident their system would match and exceed PS3 in some cases. And it did end up doing that

The fact there is nothing like that this time says a lot IMO
 
A 53 MB file split between eSRAM and main memory can be accessed @182GB/s. That's what the eSRAM is here for.

32MB@102GB/s = 0.000292180s
21.329MB@68GB/s = 0.000292120s

The buses are separate so they work simultaneously. So the entire 53MB file is done in 0.000292180s (the largest of the two times) and that gives you an rate @ 182.5GB/s.

My calculator seems fine from my standpoint.

I find it interesting that in the past week or so maths have changed such that 102 + 68 = 182 now instead of 170. :)
 
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