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Forums - Microsoft - DigitalFoundry: X1 memory performance improved for production console/ESRAM@192 GB/s

drkohler on 28 June 2013

ok.. found it. We probably have to wait until August 27th 5pm to get some answers
http://www.hotchips.org/ " XBOX One Silicon" John Sell and Pat O’Connor



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ethomaz on 28 June 2013
drkohler said:
ok.. found it. We probably have to wait until August 27th 5pm to get some answers
http://www.hotchips.org/ " XBOX One Silicon" John Sell and Pat O’Connor

I was about to post that... I saw in GAF.

Do you expect MS to share "info" about the APU?



drkohler on 28 June 2013
ethomaz said:
drkohler said:
ok.. found it. We probably have to wait until August 27th 5pm to get some answers
http://www.hotchips.org/ " XBOX One Silicon" John Sell and Pat O’Connor

I was about to post that... I saw in GAF.

Do you expect MS to share "info" about the APU?

I expect.. not much given the time for the talks. But this is usually a forum filled with engineers where speakers can't bullshit their way out so there might be the "right" questions asked (and I'm sure there will be some people there with the right questions). Whether we get the right answers is anyone's guess, though.
edit Just noticed I made a mess with bits and bytes in my posts in this thread (ideas and conclusions are unchanged, however)



DeadBigfoot21 on 28 June 2013

Microsoft has been doing some good things to the xbox one, i cant wait to get mine at launch.



ethomaz on 29 June 2013

And the rumos begins or re-begins... from Reedit.

So this article at the top of /r/games sounds pretty rosy. They're claiming the esram on the XBO can actually push 192.0 GB/s. That sounds really great...

Except if we read the actual statement, it is this.

However, with near-final production silicon, Microsoft techs have found that the hardware is capable of reading and writing simultaneously. Apparently, there are spare processing cycle "holes" that can be utilised for additional operations.

No, they didn't wake up one morning and realize there was an extra data line in their memory module, so lets drill down to what that actually means.

Apparently, there are spare processing cycle "holes" that can be utilised for additional operations.

In other words, no, it isn't capable of bidirectional data transfer. Their trying to push through a few extra memory operations, but the it's still strictly read or write.

Now, look at the actual numbers. I have to give credit to R_K_M and Boreras for pointing this out. I'm just aggregating, so I'm going to direct quote.

If I am not mistaken, that just means that they lowered the clock from 800 to 750 and are using the bi-directonal bandwith number for marketing when everyone else is using the bandwith number in one direction. - R_K_M

you're right the numbers do match up perfectly for that (750 (GPU clock) * 128 (bus width)*2(read&write during same cycle) = 192.0 GB/s --- if it were 800 MHz you would get 204.8 GB/s) - Boreras

So we can basically confirm that cboat was correct. The numbers tell the truth. The esram has been downclocked, and Microsoft's PR department is trying to spin it as an increase in total bandwidth based on some cycle tricks that are probably being exaggerated.

http://www.reddit.com/r/Games/comments/1h9ix3/so_did_microsoft_just_spin_a_downclocked_esram/

I don't believe in downclock.... I believe in yields issues and that's what cboat said (he never said anything about downclock) but the numbers are wrong... the math don't compute and I will believe that the article is wrong with the numbers... if not then I need to begin to believe in downclock.

Downgrade or not... MS is trying to PR marketing bullshit again.



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walsufnir on 29 June 2013
ethomaz said:

Downgrade or not... MS is trying to PR marketing bullshit again.


Why MS? Did they say anything official? Don't be so early to say "bullshit" only because the idiots at GAF do so, they also don't have any fucking clue what's actually in the box.



ethomaz on 29 June 2013

walsufnir said:

Why MS? Did they say anything official? Don't be so early to say "bullshit" only because the idiots at GAF do so, they also don't have any fucking clue what's actually in the box.

Read the article again please... it is MS telling these numbers if true (I don't how much I can believe in this article because the confuse numbers).

And forget GAF... I'm saying MS is doing PR bullshit if true... call me idiot not them (but I agre there a lot of guys that didn't know what are talking there).

PS. Did you my new rumor thread about the PS3 die shrink? I found in twitter unintentionally .



Stinky on 29 June 2013

How is it MS PR? The info is leaked from devs, why would MS spin their specs to devs? This isn't marketing speak.



ethomaz on 29 June 2013
Stinky said:
How is it MS PR? The info is leaked from devs, why would MS spin their specs to devs? This isn't marketing speak.

You right... it's not PR... only bullshit



MB1025 on 29 June 2013
ethomaz said:

And the rumos begins or re-begins... from Reedit.

So this article at the top of /r/games sounds pretty rosy. They're claiming the esram on the XBO can actually push 192.0 GB/s. That sounds really great...

Except if we read the actual statement, it is this.

However, with near-final production silicon, Microsoft techs have found that the hardware is capable of reading and writing simultaneously. Apparently, there are spare processing cycle "holes" that can be utilised for additional operations.

No, they didn't wake up one morning and realize there was an extra data line in their memory module, so lets drill down to what that actually means.

Apparently, there are spare processing cycle "holes" that can be utilised for additional operations.

In other words, no, it isn't capable of bidirectional data transfer. Their trying to push through a few extra memory operations, but the it's still strictly read or write.

Now, look at the actual numbers. I have to give credit to R_K_M and Boreras for pointing this out. I'm just aggregating, so I'm going to direct quote.

If I am not mistaken, that just means that they lowered the clock from 800 to 750 and are using the bi-directonal bandwith number for marketing when everyone else is using the bandwith number in one direction. - R_K_M

you're right the numbers do match up perfectly for that (750 (GPU clock) * 128 (bus width)*2(read&write during same cycle) = 192.0 GB/s --- if it were 800 MHz you would get 204.8 GB/s) - Boreras

So we can basically confirm that cboat was correct. The numbers tell the truth. The esram has been downclocked, and Microsoft's PR department is trying to spin it as an increase in total bandwidth based on some cycle tricks that are probably being exaggerated.

http://www.reddit.com/r/Games/comments/1h9ix3/so_did_microsoft_just_spin_a_downclocked_esram/

I don't believe in downclock.... I believe in yields issues and that's what cboat said (he never said anything about downclock) but the numbers are wrong... the math don't compute and I will believe that the article is wrong with the numbers... if not then I need to begin to believe in downclock.

Downgrade or not... MS is trying to PR marketing bullshit again.


Any chance you get to attack Microsoft you will take it. Maybe you should read. DF reported this information from a source. Yet in your eyes this is Microsoft PR bullshit.