I couldn't resist and have just flashed my board with the 1.0.2 beta bios and as per the Abit/Asus boards it gives you to enable "PAT". These are the changes I saw:
In [MAIN] bios - additional 2 ide channels (i.e i presume the 2 devices on the sata controller)
In Advanced:
Advance Chipset Features:
- Memory Performance (in the help this is explained as: "Memory Pefromance Acceleration Mode" in FSB800/DDR400 - in other words PAT I presume).
Option here of disabled/enabled.
When "disable" I noticed the option x O.C Dram Stability is available as either "Standard" or "Optimised".
When "enabled" option O.C Dram Stability is disabled, but "Extreme Timing" option is available, can be set as "enable"/"disabled".
I am doing a quick test of "Memory Performance" enabled with "Extreme Timing" disabled and there are performance improvements.
I am currently running (pre bios update) 222FSB/444Mhz (1:1) @2.75 and memory timings 2,6,3,2 and an 2.8C CPU these are the following results:
Bios: 1.0.1
AIDA32 (v3.61) Memory Benchmark Read/Write: 4270/1904
Sandra 2003: Int Buffered: 4805
Hexus PiFast: 65.17
Quick Pi (32m): 313.82
PCMark 2002: Memory: 8568
Bios: 1.0.2
As per 1.0.1 settings, Memory Performance ->Disabled, OC Stability ->Standard
AIDA32 (v3.61) Memory Benchmark Read/Write: 4295/1940
Sandra 2003: Int Buffered: 4836
Hexus PiFast: 65.14
Quick Pi (32m): 313.82
PCMark 2002: Memory: 8515
With Memory Peformance -> Enabled, and Extreme Timings ->Disabled:
AIDA32 (v3.61) Memory Benchmark Read/Write: 4915/1940
Sandra 2003: Int Buffered: 5170 - Float: 5128
Hexus PiFast: 64.16
Quick Pi (32m): 311.69
PCMark 2002: Memory: 9098
With Memory Peformance -> Enabled, and Extreme Timings ->Enabled:
with 222FSB/444MHZ -> does not boot.
Please note that if this DOES happen keep you finger on the "Insert" key and it should reset the FSB, Voltages, Memory, AGP/PCI ratio all to the default. If you do turn the PC off keep your finger on the "Insert" key on power on and it should reset so you can get into CMOS. This should save the time and hassle of clearing the CMOS on the board it self (unlike my Gigabyte SQ800 Ultra).
with 200FSMB/400 -> boots, but when loading windows xp it reboots.
It looks like that it chooses the most aggressive memory timings it can and my corsair memory doesn't like it. In DUAL DDR mode I can only go 2,6,3,2 (I can't set RAS# to CAS# delay to 2, although with a single stick I can do 2,5,2,2). So if you have already found your optimal memory timings the "agressive timing" settings must ignore your manual settings or auto spd. So stick to leaving "agressive timing" disabled.
Note: these are quick test results, run once.
Next thing to try/test is to up my current limit for stability in DUAL DDR mode of 222FSB/444Mhz (1:1). I am currently running Quick PI and Prime95 for a while to ensure that these settings with Memory Performance Acceleration Mode enabled is stable.
Also, for owners of the non PRO II board (PX865PE Pro) an updated bios is available as well with these new options (Version 1.08b).
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