There are Fourteen 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

To Be Phased Out

•Performance: 12000 kbps / 2000 kbps

•Blast: 16000 kbps / 2000 kbps

•Blast: 20000 kbps / 4000 kbps

•Blast: 25000 kbps / 4000 kbps

•Ultra: 22000 kbps / 5000 kbps

•Extreme 50: 50000 kbps / 10000 kbps

Select Areas

•Performance: 20000 kbps / 4000 kbps ( DOCSIS 3.0 tier Upgrade)

•Blast: 50000 kbps / 10000 kbps ( DOCSIS 3.0 tier Upgrade)

•Blast: 50000 kbps / 15000 kbps ( DOCSIS 3.0 tier Upgrade)

•Extreme 105: 105000 kbps / 20000 kbps ( DOCSIS 3.0 tier )

•Extreme 305: 305000 kbps / 65000 kbps ( Fiber To The Home / FTTH 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 375 KB/sec maximum transfer rate when you are downloading and about 96 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.

To Be Phased Out

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 tier)
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.

Blast: 25000 kbps / 4000 kbps (DOCSIS 3.0 tier)
Downstream: 27500 kbps
Upstream: 4400 kbps

This translates into about 3437.5 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 tier)
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 tier)
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.

Select Areas

Performance: 20000 kbps / 4000 kbps (DOCSIS 3.0 tier)
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.

Blast: 50000 kbps / 10000 kbps (DOCSIS 3.0 tier)
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.

Blast: 50000 kbps / 15000 kbps (DOCSIS 3.0 tier)
Downstream: 55000 kbps
Upstream: 16500 kbps

This translates into about 6875 KB/sec maximum transfer rate when you are downloading and about 1875 KB/sec maximum transfer rate when you are uploading.

Extreme 105: 105000 kbps / 20000 kbps (DOCSIS 3.0 tier)
Downstream: 116000 kbps
Upstream: 22000 kbps

This translates into about 14500 KB/sec maximum transfer rate when you are downloading and about 2750 KB/sec maximum transfer rate when you are uploading.

Extreme 305: 305000 kbps / 65000 kbps (Fiber To The Home / FTTH tier)
Downstream: 335500 kbps
Upstream: 71500 kbps

This translates into about 41937.5 KB/sec maximum transfer rate when you are downloading and about 8937.5 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 = bits
B = Bytes




*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: 2013-02-16 08:44:17