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Software Compatibility
The graphics driver for the RS780E is fully compatible with all other Radeon class graphics controllers from AMD. A
single driver can support multiple graphics configurations across AMD's product lines, including the Radeon family and
the AMD chipset family. In addition, this driver compatibility allows the RS780E to benefit immediately from AMD's
software optimization and from the advanced Windows
Radeon family drivers.
1.2
RS780E Features
1.2.1
CPU HyperTransport
•
Supports 16-bit up/down HyperTransport (HT) 3.0 interface up to 4.4GT/s.
•
Supports 200, 400, 600, 800, and 1000MHz HT1 frequencies.
•
Supports 1.8, 2.0, and 2.2 GHz HT3 frequencies.
•
Supports AMD Athlon single-core and AMD Athlon X2 dual-core processors, AMD Sempron processors, and AMD
Turion 64 X2 dual-core mobile technology.
•
Supports power saving features as specified in section 8.6.1 of the HyperTransport I/O Link Specification Rev 3.00a,
including:
•
Dynamic link configuration
•
Dynamic link disconnection
•
Dynamic link width
•
Dynamic link frequency
•
Disconnected link refresh (HT3 only)
•
Inactive link refresh (HT3 only)
•
Supports LDTSTOP interface and CPU link frequency throttling and stutter mode.
1.2.2
Memory Interface
•
Supports an optional dedicated local frame buffer (side-port) of up to 128MB through a 16-bit interface. Note,
however, that the memory interface is optimized for a 64MB local frame buffer.
•
New highly flexible memory architecture allows asymmetric side-port and shared system memory frame buffer sizes.
Supported configurations include UMA only and UMA+side-port (interleave mode).
•
New dynamic memory allocation scheme improves performance and reduces power simultaneously.
•
Support for DDR2 memories up to DDR2-800, with a maximum memory clock speed of 400MHz. Memory clock is
independent of any other clock source and can therefore be set to any frequency equal to or less than 400MHz
(DDR2-800), allowing the use of lower speed side-port memories.
•
Support for DDR3 memories up to DDR3-800, with a maximum memory clock speed of 400MHz (up to
DDR3-1200, with a maximum memory clock speed of 600MHz, when the core voltage is fixed at 1.1V). Memory
clock is independent of any other clock source and can therefore be set to any frequency equal to or less than the
maximum limit, allowing the use of lower speed side-port memories.
•
Support one memory device of x16 width (see
section 2.2.2.1, "Supported DDR3 Components," on page
•
Asynchronous HyperTransport and memory controller interface speeds.
•
Supports DDR SDRAM self refresh mechanism.
•
Supports dynamic CKE and ODT for power conservation.
1.2.3
ATI HyperMemory
•
Supports ATI HyperMemory™*.
45732 AMD 780E Databook 3.10
1-2
Interface
™
™
®
®
XP, Windows Vista
section 2.2.1.1, "Supported DDR2 Components," on page
2-5, for details).
RS780E Features
®
, and Linux
support available in the
© 2009 Advanced Micro Devices, Inc.
2-4.and
Proprietary
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