Dell OptiPlex 5055 Ryzen APU Tower Owners Manual - Page 60

Active State Power Management, Applications, Compatibility

Get Dell OptiPlex 5055 Ryzen APU Tower PDF manuals and user guides View all Dell OptiPlex 5055 Ryzen APU Tower manuals
Add to My Manuals
Save this manual to your list of manuals

Page 60 highlights

real-world maximum. Similarly, USB 3.1 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world maximum rate of 400MB/s with overheads. At this speed, USB 3.1 Gen 1 is a 10x improvement over USB 2.0. Applications USB 3.1 Gen 1 opens up the laneways and provides more headroom for devices to deliver a better overall experience. Where USB video was barely tolerable previously (both from a maximum resolution, latency, and video compression perspective), it's easy to imagine that with 5-10 times the bandwidth available, USB video solutions should work that much better. Single-link DVI requires almost 2Gbps throughput. Where 480Mbps was limiting, 5Gbps is more than promising. With its promised 4.8Gbps speed, the standard will find its way into some products that previously weren't USB territory, like external RAID storage systems. Listed below are some of the available SuperSpeed USB 3.1 Gen 1 products: ● External Desktop USB 3.1 Gen 1 Hard Drives ● Portable USB 3.1 Gen 1 Hard Drives ● USB 3.1 Gen 1 Drive Docks & Adapters ● USB 3.1 Gen 1 Flash Drives & Readers ● USB 3.1 Gen 1 Solid-state Drives ● USB 3.1 Gen 1 RAIDs ● Optical Media Drives ● Multimedia Devices ● Networking ● USB 3.1 Gen 1 Adapter Cards & Hubs Compatibility The good news is that USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0. First of all, while USB 3.1 Gen 1 specifies new physical connections and thus new cables to take advantage of the higher speed capability of the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0 contacts in the exact same location as before. Five new connections to carry receive and transmitted data independently are present on USB 3.1 Gen 1 cables and only come into contact when connected to a proper SuperSpeed USB connection. Windows 8/10 will be bringing native support for USB 3.1 Gen 1 controllers. This is in contrast to previous versions of Windows, which continue to require separate drivers for USB 3.1 Gen 1 controllers. Microsoft announced that Windows 7 would have USB 3.1 Gen 1 support, perhaps not on its immediate release, but in a subsequent Service Pack or update. It is not out of the question to think that following a successful release of USB 3.1 Gen 1 support in Windows 7, SuperSpeed support would trickle down to Vista. Microsoft has confirmed this by stating that most of their partners share the opinion that Vista should also support USB 3.1 Gen 1. Super-Speed support for Windows XP is unknown at this point. Given that XP is a seven-year-old operating system, the likelihood of this happening is remote. Active State Power Management This section describes about the Active State Power Management (ASPM). ASPM is the power management capability of hardware to effectively reduce usage of power by placing the PCI Express(PCIe) based serial link devices to low-power state when not in use. ASPM is controlled by BIOS or the power management component of the operating system in two configurations. ● Disabled: PCIe devices operate on high-performance mode. ● L1 Mode: Bi-directional setting of the serially linked PCIe device to low-power state. NOTE: This mode provides with higher power saving at expense of latency when re-establishing the connection. The PCIe bus must be woken up from low-power mode to re-establish the connection with the device. This accounts for the latency, which is also referred to as ASPM exit latency. 60 Technology and components

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
real-world maximum. Similarly, USB 3.1 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world maximum
rate of 400MB/s with overheads. At this speed, USB 3.1 Gen 1 is a 10x improvement over USB 2.0.
Applications
USB 3.1 Gen 1 opens up the laneways and provides more headroom for devices to deliver a better overall experience. Where
USB video was barely tolerable previously (both from a maximum resolution, latency, and video compression perspective), it's
easy to imagine that with 5-10 times the bandwidth available, USB video solutions should work that much better. Single-link
DVI requires almost 2Gbps throughput. Where 480Mbps was limiting, 5Gbps is more than promising. With its promised 4.8Gbps
speed, the standard will find its way into some products that previously weren't USB territory, like external RAID storage
systems.
Listed below are some of the available SuperSpeed USB 3.1 Gen 1 products:
●
External Desktop USB 3.1 Gen 1 Hard Drives
●
Portable USB 3.1 Gen 1 Hard Drives
●
USB 3.1 Gen 1 Drive Docks & Adapters
●
USB 3.1 Gen 1 Flash Drives & Readers
●
USB 3.1 Gen 1 Solid-state Drives
●
USB 3.1 Gen 1 RAIDs
●
Optical Media Drives
●
Multimedia Devices
●
Networking
●
USB 3.1 Gen 1 Adapter Cards & Hubs
Compatibility
The good news is that USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0. First of all,
while USB 3.1 Gen 1 specifies new physical connections and thus new cables to take advantage of the higher speed capability
of the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0 contacts in the exact same
location as before. Five new connections to carry receive and transmitted data independently are present on USB 3.1 Gen 1
cables and only come into contact when connected to a proper SuperSpeed USB connection.
Windows 8/10 will be bringing native support for USB 3.1 Gen 1 controllers. This is in contrast to previous versions of Windows,
which continue to require separate drivers for USB 3.1 Gen 1 controllers.
Microsoft announced that Windows 7 would have USB 3.1 Gen 1 support, perhaps not on its immediate release, but in a
subsequent Service Pack or update. It is not out of the question to think that following a successful release of USB 3.1 Gen 1
support in Windows 7, SuperSpeed support would trickle down to Vista. Microsoft has confirmed this by stating that most of
their partners share the opinion that Vista should also support USB 3.1 Gen 1.
Super-Speed support for Windows XP is unknown at this point. Given that XP is a seven-year-old operating system, the
likelihood of this happening is remote.
Active State Power Management
This section describes about the Active State Power Management (ASPM).
ASPM
is the power management capability of hardware to effectively reduce usage of power by placing the PCI Express(PCIe)
based serial link devices to low-power state when not in use.
ASPM is controlled by BIOS or the power management component of the operating system in two configurations.
●
Disabled: PCIe devices operate on high-performance mode.
●
L1 Mode: Bi-directional setting of the serially linked PCIe device to low-power state.
NOTE:
This mode provides with higher power saving at expense of latency when re-establishing the connection.
The PCIe bus must be woken up from low-power mode to re-establish the connection with the device. This accounts for the
latency, which is also referred to as ASPM exit latency.
60
Technology and components