# New article - The Common System Interface: Intel's Future Interconnect

By: Michael S (already5chosen.delete@this.yahoo.com), August 31, 2007 2:11 am
Mr. Camel (a@b.c) on 8/31/07 wrote:
---------------------------
>I am trying to compare Beckton's and Tukwila's CSI bandwidths per socket (per socket
>bandwidth = PSB for the rest of this post). I know that the following calculations
>will be wrong, but I am hoping that some knowledgeable person will post a reply and correct me.
>
>David's article stated that Beckton's per socket bandwidth will be up to 10X that
>of it's predecessor. I am assuming that the predecessor is Tigerton (or the 45
>nm version of Tigerton). So from currently available information, Tigerton's PSB
>will be 34/4 = 8.5 GB/s. This means that Beckton's PSB will be 85 GB/s. The article
>gives a number for Tukwila's bandwidth but I am not sure if it is the per core bandwith
>or the PSB. If we assume David is referring to the PSB (160 GB/s), the Tukwila's
>platform will have roughly 2X the bandwidth of Beckton's platform.
>
>Somebody please correct me if I'm wrong.
>

Full CSI link a 6.4MT/s delivers 12.8 GB/s in the read direction or 11.4 GB/s in the write direction. With right mixture of reads and writes you probably can extract over 15 GB/s.
If Benton has 3 full links + 2 half links + 2 FBD800 channels than the total bandwith = 15*4+12.8*2 = 85.6 GB/s, i.e. almost exactly 10 times higher than a single 1066 MT/s bus of Tigerton.

Is a compaison meaningful? Of course, it isn't, because the system architectures too different. However that's how raw numbers add up.
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New article - The Common System Interface: Intel's Future InterconnectDavid Kanter2007/08/28 02:16 AM
New article - The Common System Interface: Intel's Future InterconnectVincent Diepeveen2007/08/28 06:02 AM
New article - The Common System Interface: Intel's Future InterconnectRichard Cownie2007/08/28 11:28 AM
New article - The Common System Interface: Intel's Future InterconnectVincent Diepeveen2007/08/31 12:44 PM
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New article - The Common System Interface: Intel's Future InterconnectMichael S2007/09/02 03:25 AM
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New article - The Common System Interface: Intel's Future InterconnectDavid Kanter2007/09/14 09:47 PM
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Thanks for the workWouter Tinus2007/08/28 01:33 PM
Thanks for the workmac2007/08/29 01:44 PM
New article - The Common System Interface: Intel's Future InterconnectHerbert Hum2007/08/28 02:22 PM
ThanksDavid Kanter2007/08/28 05:13 PM
Many thanks, very, very interesting! (NT)Cameron Jack2007/08/29 02:51 AM
very nice article + memory ctrl integrationMarcin Niewiadomski2007/08/29 12:46 PM
very nice article + memory ctrl integrationDavid Kanter2007/09/14 09:50 PM
very nice article + memory ctrl integrationMarcin Niewiadomski2007/09/16 09:48 PM
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New article - The Common System Interface: Intel's Future InterconnectMr. Camel2007/08/30 04:16 PM
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New article - The Common System Interface: Intel's Future InterconnectMr. Camel2007/08/31 04:13 AM
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New article - The Common System Interface: Intel's Future InterconnectMichael S2007/08/31 07:36 AM
New article - The Common System Interface: Intel's Future InterconnectMr. Camel2007/08/31 09:36 AM
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