There are Ten current HSI tiers.
These are the Advertised Rates of service as follows:

Economy: 1500 kbps / 384 kbps

Economy Plus: 3000 kbps / 768 kbps

Performance Starter: 6000 kbps / 1000 kbps

Performance Plus: 8000 kbps / 2000 kbps ( Is being upgraded to 16000/2000 )

Blast!: 16000 kbps / 2000 kbps

Select areas

Performance: 12000 kbps / 2000 kbps ( Upgrade in DOCSIS 3.0 areas )

*Blast!: 20000 kbps / 4000 kbps ( New Upgrade in DOCSIS 3.0 areas )

Ultra: 22000 kbps / 5000 kbps ( DOCSIS 3.0 tier / Soon to be phased out )

Extreme 50: 50000 kbps / 10000 kbps ( DOCSIS 3.0 tier )

Extreme 105: 1050000 kbps / 10000 kbps ( DOCSIS 3.0 tier )

The Provisioned Rates which are the overhead/caps are as follows:

Economy: 1500 kbps / 384 kbps
Downstream: 1500 kbps
Upstream: 384 kbps

This translates into about 187.50 KB/sec maximum transfer rate when you are downloading and about 48 KB/sec maximum transfer rate when you are uploading.

Economy Plus: 3000 kbps / 768 kbps
Downstream: 3000 kbps
Upstream: 768 kbps

This translates into about 187.50 KB/sec maximum transfer rate when you are downloading and about 48 KB/sec maximum transfer rate when you are uploading.

Performance Starter: 6000 kbps / 1000 kbps
Downstream: 6600 kbps
Upstream: 1100 kbps

This translates into about 825 KB/sec maximum transfer rate when you are downloading and about 137.50 KB/sec maximum transfer rate when you are uploading.

Performance Plus: 8000 kbps / 2000 kbps
Downstream: 8800 kbps
Upstream: 2200 kbps

This translates into about 1100 KB/sec maximum transfer rate when you are downloading and about 275 KB/sec maximum transfer rate when you are uploading.

Performance: 12000 kbps / 2000 kbps (DOCSIS 3.0 areas)
Downstream: 13200 kbps
Upstream: 2200 kbps

This translates into about 1650 KB/sec maximum transfer rate when you are downloading and about 275 KB/sec maximum transfer rate when you are uploading.

Blast: 16000 kbps / 2000 kbps
Downstream: 17600 kbps
Upstream: 2200 kbps

This translates into about 2200 KB/sec maximum transfer rate when you are downloading and about 275 KB/sec maximum transfer rate when you are uploading.

*Blast: 20000 kbps / 4000 kbps (DOCSIS 3.0 areas)
Downstream: 22000 kbps
Upstream: 4400 kbps

This translates into about 2750 KB/sec maximum transfer rate when you are downloading and about 550 KB/sec maximum transfer rate when you are uploading.

Ultra: 22000 kbps / 5000 kbps (DOCSIS 3.0 areas)
Downstream: 24200 kbps
Upstream: 5500 kbps

This translates into about 3025 KB/sec maximum transfer rate when you are downloading and about 687.5 KB/sec maximum transfer rate when you are uploading.

Extreme 50: 50000 kbps / 10000 kbps (DOCSIS 3.0 areas)
Downstream: 55000 kbps
Upstream: 11000 kbps

This translates into about 6875 KB/sec maximum transfer rate when you are downloading and about 1375 KB/sec maximum transfer rate when you are uploading.

Extreme 105: 1050000 kbps / 10000 kbps (DOCSIS 3.0 areas)
Downstream: 1160000 kbps
Upstream: 11000 kbps

This translates into about 14500 KB/sec maximum transfer rate when you are downloading and about 1375 KB/sec maximum transfer rate when you are uploading.

These provisioned rates do not reflect PowerBoost

Acceptable download/upload speeds by opinion are 80% of your advertised rates.

Actual speeds may vary and are not guaranteed.

If you are running a home network, keep in mind that this bandwidth is shared amongst each computer. A computer accessing the home network at the same time as another computer, will not get the full bandwidth. It will be distributed between the computers.

Note:
B = Bytes
b = bits

*This FAQ is based on user knowledge from a volunteer core of BroadbandReports' members. This FAQ in no way constitutes official information from Comcast or any of its affiliates.

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by Johkal
last modified: 2011-04-12 18:08:24