Neo Bios 1.6 and Slow/Fast/Turbo/Ultra Modes

Can anyone tell me what the difference is between the Slow/Fast/Turbo/Ultra modes in Bios 1.6 on the Neo boards?
The only mode I can get to work is the Slow mode. On all the rest, Win XP boots OK, but when I would run programs, the screen would lock for a few seconds, then come back in low resolution stating I had an unspecified "device failure", and I had to restart my computer for it to work properly.
In any case, I have no clue what the difference is between modes. I was able to complete a 3dMark test while in Turbo mode, and compared it with one run in Slow mode, and the differences were minimal.
Can anyone enlighten me?

No OC, Timings = by SPD, DRAM Frequency = Auto (200/400)
Slow/Fast/Turbo/Ultra-Turbo results
AIDA32 Display/GPU
GPU Clock 200 210 210 210
Memory clk 458 (no change)
AIDA32 Motherboard/Motherboard (Effective clocks)
FSB 809 (no change)
Mem 404 (no change)
Chipset 270 404 404 404
SANDRA MAX3 Memory Benchmark
INT 4340 4837 4956 5099
Float 4390 4834 4970 5048
PAT OFF ON ON ON
Timings 2.0,4,4,6 2.0,3,3,6 2.0,2,3,6 2.0,2,2,6
"Slow" disables PAT/MAT and reduces the chipset bus frequency to 66Mhz (quad pumped)
"Fast/Turbo/Ultra-Turbo" Overclock your video card!!!
If you set your memory timings manualy or use a ratio other than 1:1 there will be no difference between Fast/Turbo/Ultra-turbo (only difference being "by SPD" memory timings) -as far as i can tell
There maybe other differences but not found them ....yet

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Nice forum....Just have to get used to it. I find the searching isnt as good as the lats one but look gr8.
Anyways I have just got 1024MB Corsair PC3200 2-2-2-5 RAM. Its amazing made my PC so much faster and timings have made it so responsive.
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http://www.gruntville.com/reviews/memory/corsair_twinx3200xl/page3.php
The settings you are referring to are associated with PAT.
There are different levels of PAT, if you choose slow, is it off in CPUZ?
FAST
TURBO
ULTRA TURBO
CPUZ will report PAT to be enabled on all of these settings but it may not be fully enabled.
ULTRA TURBO = FULLY enabled PAT mode.
Run this program to tell you the level of PAT
ftp://ftp.heise.de/pub/ct/ctsi/ctiaw.zip
Extract it to a folder, run the lowercase version.
See what PAT level it is running at.
Then change modes and run the program again.
What it does, going back to the INTEL link,
The setting adjust the memory/chipset timings to achieve higher system performance.
It should not be a problem if you have good memory.
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Quote from: koike on 21-March-09, 23:14:40
Thanks Vern,
I´m thinking in get a Zalman 9700 cooler.
Now I have started to do what you say and increase the fsb by steps of 5 and run 3dmak06 and Everest stress test for 5 or 10 minutes to see if the system is stable.
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