AMD AutoXpress

Zarolho

Zarolho

Power Member
We just got information that the new RD790, RD780 & RX780 chipsets will have a new option in BIOS that will allow to get a few extra performance. This is something like NVIDIA's LinkBoost feature but goes a step further in tweaking.


Feature Options: ON (default) / OFF / Custom
Upon selecting CUSTOM option - 3 options that have no submenus appear (the details listed below are hidden). These options only have two modes ON or OFF. Selecting ON selects ALL functions in that mode.
  • o CPU (ON default /OFF)
  • o XpressRoute (ON default/OFF)
  • o MemBoost (ON default/OFF)
Sub Section Name: CPU (ON / OFF)
  • Function 1: To Maximize CPU performance
  • Detail: Change CPU ClkDivisor to “Divide-by-1” mode
  • Limitation: For Phenom (K10) CPU only
Sub Section Name: XpressRoute (ON / OFF)
  • Function 1: To accelerate transfers of data to and from graphics
  • Detail: Increase PCIE clock for Graphic cards with certain device ids. Internal qualification has been done on R600 and R580+ cards and has shown stability at 150Mhz-160Mhz on the PCIE bus (Gen1). Corner lot testing has shown that 125Mhz should be the recommended default to cover worst case scenarios.
  • Limitation: For RD780 and RD790 only.
  • Function 2: To accelerate transfers of data b/w graphics (most notably in SW CrossFire)
  • Detail: Enable BIOS setting to allow P2P transfers
  • Limitation: For RD780 and RD790 only
  • Function 3: To maximize transfer bandwidth of graphics data with a HT1 CPU
  • Detail: Enable BIOS setting to double pump graphics data across HyperTransport
  • Limitation: For RD780 and RD790 only. For HT1 CPUs only (disable for HT3 CPUs)
Sub Section Name: MemBoost (ON / OFF)
  • Function 1: To accelerate memory bandwidth performance with DDR2-800 or higher DIMMs with K8 CPUs
  • Detail: Alter memory timings for DDR2-800 or higher DIMMs
  • Limitation: For RD780 and RD790 only. For DDR2-800 or higher DIMMS. For K8 CPUs only.
Fine tuning adjustments:
Trc, reduce by 2
Twr, reduce by 2
Trrd, reduce by 1
Tref, 7.8us instead of 3.9us
Twtr, reduce by 1
BankSwizzleMode, Enable
Queue Bypass Max. increase to 7
  • Function 2: Disable DRAM PowerDown mode
  • Detail: Change register to 0
  • Limitation: For RD780 and RD790 only.
  • Function 3: Read Enthusiast DIMMs with multiple SPDs
  • Detail: Read Performance SPD that gives maximum performance
  • Limitation: For RD790 only.
Stay tuned as i will have test to show performance gains

Source: Chilehardware
 
AMD AutoXpress Feature to Accelerate Performance of AMD RD790/RD780/RX780 Chipsets

AMD AutoXpress Feature to Accelerate Performance of AMD RD790/RD780/RX780 Chipsets


AMD's new 7 series of chipsets will be arriving soon and they are expected to bring a new level of performance to the K8 architecture. However, members at ChileHardware found something interesting while investigating the BIOS of the new chipsets, the AMD AutoXpress feature(s). AutoXpress allows accelerated performance on K10 processors, automatic overclocking of the PCIe bus when using graphics cards based on R580+ or newer, and accelerated data transfers in between graphics card when running CrossFire. It even allow the HyperTransport bus to be double-pumped when using a HT 1.0 processor, through a feature called XpressRoute. There will also be a MemBoost feature that can be used with high-end DDR2-800 and higher memory for lower latencies when using a K8 processor.


Source: NordicHardware, ChileHardWare
Clicar para expandir...


We just got information that the new RD790, RD780 & RX780 chipsets will have a new option in BIOS that will allow to get a few extra performance. This is something like NVIDIA's LinkBoost feature but goes a step further in tweaking.


Feature Options: ON (default) / OFF / Custom
Upon selecting CUSTOM option - 3 options that have no submenus appear (the details listed below are hidden). These options only have two modes ON or OFF. Selecting ON selects ALL functions in that mode.

  • o CPU (ON default /OFF)
  • o XpressRoute (ON default/OFF)
  • o MemBoost (ON default/OFF)


Sub Section Name: CPU (ON / OFF)

  • Function 1: To Maximize CPU performance
  • Detail: Change CPU ClkDivisor to “Divide-by-1” mode
  • Limitation: For Phenom (K10) CPU only

Sub Section Name: XpressRoute (ON / OFF)

  • Function 1: To accelerate transfers of data to and from graphics
  • Detail: Increase PCIE clock for Graphic cards with certain device ids. Internal qualification has been done on R600 and R580+ cards and has shown stability at 150Mhz-160Mhz on the PCIE bus (Gen1). Corner lot testing has shown that 125Mhz should be the recommended default to cover worst case scenarios.
  • Limitation: For RD780 and RD790 only.


  • Function 2: To accelerate transfers of data b/w graphics (most notably in SW CrossFire)
  • Detail: Enable BIOS setting to allow P2P transfers
  • Limitation: For RD780 and RD790 only

  • Function 3: To maximize transfer bandwidth of graphics data with a HT1 CPU
  • Detail: Enable BIOS setting to double pump graphics data across HyperTransport
  • Limitation: For RD780 and RD790 only. For HT1 CPUs only (disable for HT3 CPUs)


Sub Section Name: MemBoost (ON / OFF)

  • Function 1: To accelerate memory bandwidth performance with DDR2-800 or higher DIMMs with K8 CPUs
  • Detail: Alter memory timings for DDR2-800 or higher DIMMs
  • Limitation: For RD780 and RD790 only. For DDR2-800 or higher DIMMS. For K8 CPUs only.

Fine tuning adjustments:
Trc, reduce by 2
Twr, reduce by 2
Trrd, reduce by 1
Tref, 7.8us instead of 3.9us
Twtr, reduce by 1
BankSwizzleMode, Enable
Queue Bypass Max. increase to 7
  • Function 2: Disable DRAM PowerDown mode
  • Detail: Change register to 0
  • Limitation: For RD780 and RD790 only.


  • Function 3: Read Enthusiast DIMMs with multiple SPDs
  • Detail: Read Performance SPD that gives maximum performance
  • Limitation: For RD790 only.


Stay tuned as i will have test to show performance gains

Source: Chilehardware


http://www.xtremesystems.org/forums/showthread.php?t=159969
Clicar para expandir...


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