AMD AutoXpress

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09-24-2007, 05:19 AM
metro.cl

AMD AutoXpress
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
09-24-2007, 05:27 AM
Shintai

Thats a nice new selection to OCers :D
09-24-2007, 05:30 AM
Lightman

As usual great news form you Metro!

Now I'm waiting for your results... :D

Many thanks for sharing!
09-24-2007, 05:30 AM
BeardyMan

Quote:

Originally Posted by Shintai

Thats a nice new selection to OCers :D

Indeed and its coming from AMD :D
09-24-2007, 06:04 AM
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.
09-24-2007, 06:58 AM
madcho

i was waiting for something like this :D
09-24-2007, 07:12 AM
Yakyb

Quote:

Originally Posted by madcho

i was waiting for something like this :D

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
09-24-2007, 07:44 AM
Origin_Unknown

CPU OFF?

Will that not um, turn off the cpu?
09-24-2007, 08:02 AM
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.
09-24-2007, 11:53 AM
Aerou

Quote:

Originally Posted by 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.

now that would be awesome!
09-24-2007, 12:00 PM
K404

Quote:

Originally Posted by 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.

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?
09-24-2007, 03:58 PM
ExodusC

I'm liking the idea of the XpressRoute function.
09-24-2007, 10:57 PM
alpha0ne

Thanks for the news :up:

I'm still patiently waiting for these new boards and chips to become available for my next project :yepp:
09-26-2007, 05:09 AM
krampak

I don't see such options on my M790-DQ6 :( Maybe it's reserved for final release version.
09-26-2007, 06:44 AM
Lightman

Quote:

Originally Posted by krampak

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 ....
09-26-2007, 06:45 AM
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...
09-26-2007, 08:54 AM
metro.cl

Quote:

Originally Posted by krampak

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?
09-26-2007, 10:51 AM
krampak

Quote:

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.
09-26-2007, 12:04 PM
metro.cl

Quote:

Originally Posted by krampak

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