Well im meant to be going to work in the morning, but ive got this bug atm, where I have to overclock and optimise this bios, and im finally getting the hang of it. After scouring the ABIT forums and the mobo forums, ive been at pains to work out the "game accelerator" settings in the bios. This information was sourced from the abit forums but im sure they wont mind me posting it here.
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Right here.
In BIOS,
SoftMenu Setup
AGP Ratio (CPU:AGP:PCI) Fixed
Fixed AGP/PCI Frequency 66/33
Advanced Chipset Features
Game Accelerator Auto
-Refresh Cycle Time Auto
-Read Delay(tRD) Auto
-Read Delay Adjust(tRDA) Auto
Command Per Clock(CPC) Auto
Under Game Accelerator there is Auto, Turbo, Street Racer, and F1.
When you use BySPD with Game Accelerator set to anything other than Auto GA will override the settings BySPD has set. BIOS will always display what BySPD has set, CPU-Z will display what GA has overridden them to. Turbo tightens then up a little, Street Racer is much more aggressive, F1 is just a little more. I get:
2.5, 7, 4, 4 BySPD GA set to Auto
2.0, 7, 3, 3 BySPD GA set to Turbo
2.0, 5, 3, 2 BySPD GA set to Street Racer
2.0, 5, 2, 2 BySPD GA set to F1
There is a 100-400 point increase in Sandra memory scores with the different settings.
If you use User Defined for memory timings and use GA the timings don’t change but GA does do something that increases memory scores in Sandra. I got a 100 point increase in Sandra going from Auto to Turbo but the timings stayed the same.
A quick way to determine what you memory will run is to use BySPD and adjust Game Accelerator. There is Auto, Turbo, Street Racer and F1. The last four should be set to Auto for this.
Try BySPD and GA set to Auto. Run a few loops of memtest86+, Check timings with CPU-Z, run the Sandra memory Benchmark.
If everything is OK try BySPD and GA set to Turbo. Run a few loops of memtest86+, Check timings with CPU-Z, run the Sandra memory Benchmark.
If everything is OK try BySPD and GA set to Street Racer. Run a few loops of memtest86+, Check timings with CPU-Z, run the Sandra memory Benchmark.
If everything is OK try BySPD and GA set to F1. Run a few loops of memtest86+, Check timings with CPU-Z, run the Sandra memory Benchmark.
Setting the last two to Disabled offers a minor improvement in stability. I was getting 1 BSOD once every 12-24 hours. Setting the last two to Disabled eliminated that.
Below is what I got. Look at the timings BySPD has set and what GA has overridden then to. Notice the memory scores and how much I had to overclock to make up for the looser timings.
BIOS 20, P4 3.0
200FSB, BySPD, GA = Auto, A, A, A, A = 2.5, 4, 4, 7 = 4658/4654
200FSB, BySPD, GA =Turbo, A, A, A, A =2.5, 3, 3, 7 =4795/4798
200FSB, BySPD, GA = Street Racer, A, A, A, A = 2.0, 3, 2, 5 = 4858/4897
200FSB, BySPD, GA = F1, A, A, A, A = 2.0, 2, 2, 5 = 4929/4896
210FSB, BySPD, GA = Auto, A, A, D, D = 2.5, 4, 4, 7 = 4925/4893
210FSB, BySPD, GA = Auto, A, A, A, A = 2.5, 4, 4, 7 = 4918/4927
210FSB, BySPD, GA = Turbo, A, A, A, A = 2.5, 3, 3, 7 = 5079/5062
215FSB, BySPD, GA = Auto, A, A, A, A = 2.5, 4, 4, 7 = 4969/5022
215FSB, BySPD, GA = Turbo, A, A, A, A = 2.5, 3, 3, 7 = 5159/5140
215FSB, BySPD, GA = Street Racer, A, A, A, A = 2.0, 3, 2, 5 = 5262/5283
215FSB, BySPD, GA = Street Racer, A, A, D, D = 2.0, 3, 2, 5 = 5225/5223
Memtest86 is a memory checking program. You download it, make a bootable floppy, and then boot with it. It does not need an OS installed. Let it run several passes, the more the better. You don’t want any errors at all, if you get any you can try more voltage and/or each stick by itself.
http://www.memtest86.com/
CPU-Z gives you info on your system, including memory timings.
http://www.cpuid.com/cpuz.php
SiSoftware Sandra also gives you system info, you can test memory bandwidth and other things.
http://www.sisoftware.co.uk/
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So basically ive been playing with settings going on my first day with P4, and ive been testing, rebooting and retesting ram settings. Basically as you can see from above there are three main in bios settings, turbo, street racer and F1. It all defaults to AUTO, so im guessing this is turbo to err on the safe side.
With street racer settings and the rest on auto and 2.9 volts on the ram, I was able to run stable at around 3400mhz turning to F1 settings, and half expecting the already overclocked OCZ 3500 at 233 7-3-3-2 to take a heart attack. it posted, booted but stress testing made it reboot. tried relaxing settings. same deal.
so upping the ram to 3.0 volts and going to my settings of 233 with F1 and 7-3-3-2. I booted into windows. wham, everything stable. but i play safe, feeling that 3 volts is a little on the high side even for the wonderful platinium heatspeaders on this ram (the abit bios warns you as well once you go over 2.9 volts, a nice touch for newbies getting carried away - full marks to abit for this touch).
Taking out the zalman arm again from storage along with the 120 mm fan and using one of the few aux fan sockets on the board, I put the zalman arm on the 3 and 4 sockets of the PCI slots. and moved the fan to the far right of the arm positioning, right over the ram and next to the drives. this will aid the ram to cool. I think OCZ3500 at 233/466 7-3-3-2CAS, with F1 aggressive top settings stable is pretty impressive !
Sandra memory scores with F1 settings, rose 350 points to 5,850. Pcmark02 just under 11,000.
Impressive and just goes to show if you really try there are more gains. Cant wait until sunday now to tweak some more !