AMD AutoXpress

[metro.cl]

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

[Shintai]

Thats a nice new selection to OCers

[Lightman]

As usual great news form you Metro!

Now I'm waiting for your results...

Many thanks for sharing!

[BeardyMan]

Thats a nice new selection to OCers

Indeed and its coming from AMD

[Frank M]

Maybe RD790+this is what AMD are referring to as the soon-to-be-unveiled
'Dark side'. Looks nice on paper, will look forward to results.

[madcho]

i was waiting for something like this

[Yakyb]

i was waiting for something like this

im personnally hoping tomorrow brings a little more than just the 790 launch (although i would consider massive performance a more than just a launch) sadly my confidence is not high at the moment

[Origin_Unknown]

CPU OFF?

Will that not um, turn off the cpu?

[SnipingWaste]

It would be nice if you can up the PCI-E speeds on the video cards with out upping the PCI-E speeds on every think else. You can up the PCI-E speed on the video card and not up the speeds on the SATA to were it fails.

[Aerou]

It would be nice if you can up the PCI-E speeds on the video cards with out upping the PCI-E speeds on every think else. You can up the PCI-E speed on the video card and not up the speeds on the SATA to were it fails.

now that would be awesome!

[K404]

It would be nice if you can up the PCI-E speeds on the video cards with out upping the PCI-E speeds on every think else. You can up the PCI-E speed on the video card and not up the speeds on the SATA to were it fails.

Well...if AMD are happily working away on independent core clocking and independent V for each core, adding in a 2nd clock IC for the PCI-E lanes shouldnt be too much of a challenge.

im surprised a separate PCI-E clock for the x16 slot(s) hasnt already been tried..maybe it has, and didnt work so well?

[ExodusC]

I'm liking the idea of the XpressRoute function.

[alpha0ne]

Thanks for the news

I'm still patiently waiting for these new boards and chips to become available for my next project

[krampak]

I don't see such options on my M790-DQ6 Maybe it's reserved for final release version.

[Lightman]

I don't see such options on my M790-DQ6 Maybe it's reserved for final release version.

Can you post some BIOS pictures? Or NDA is in force ....

[Kayin]

But when are the boards coming out? Getting tired of waiting, may have to go C2D just to get something better than this 3500...

[metro.cl]

I don't see such options on my M790-DQ6 Maybe it's reserved for final release version.

I know four brands that have the option, not sure why giga doesnt have it.

Did you enter the advanced menu options?

[krampak]

Did you enter the advanced menu options?

I think I've checked every available option, even with ctrl+F1 activated (of course). Maybe its due to a early BIOS version (D25).

BTW, do u know the end of RD790 NDA ? (if there is any NDA). I was told about it and still haven't got an answer to that.

[metro.cl]

I think I've checked every available option, even with ctrl+F1 activated (of course). Maybe its due to a early BIOS version (D25).

BTW, do u know the end of RD790 NDA ? (if there is any NDA). I was told about it and still haven't got an answer to that.

There is a NDA but i dont know the date they wont tell much about it