FSX & SLI

FSX including FSX Steam version.

Re: FSX & SLI

Postby justpassingthrough » Wed Mar 28, 2007 10:54 pm

Well I found out why my boots were taking so long. I found it by process of elimination. I disconnected the IDE & power cable from my DVD ROM and my system fired up immedietely. I then plugged them back in to make sure that it was my DVD and what do you know? The slow boots were back. I've been having problems with it for years and I think it's finally starting to crap out on me.



I did not know you were having slow boot problems. I recall the boot failure you were having where it just sat with a black screen but unless senility has completely set in, (I'm getting there), I don't recall reading anything about a slow boot problem.

Guess its time for that new BlueRay DVD Burner
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Re: FSX & SLI

Postby Black ZR-1 » Wed Mar 28, 2007 11:04 pm

It started right here: http://www.simviation.com/cgi-bin/yabb2 ... 157609/360

Nick said give it a couple days for the system to clear, but it's been a couple weeks so I knew something was wrong. I started doing my process of elimination and I found it.

It's not a jumper problem, I checked those..

LoL Blueray....
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Re: FSX & SLI

Postby justpassingthrough » Wed Mar 28, 2007 11:17 pm

It started right here: http://www.simviation.com/cgi-bin/yabb2 ... 157609/360

Nick said give it a couple days for the system to clear, but it's been a couple weeks so I knew something was wrong. I started doing my process of elimination and I found it.

It's not a jumper problem, I checked those..

LoL Blueray....



Ah!  Ok ..

Yep, senility at its finest. I remember that now but forgot, probably because I just assumed it cleared up.


The first time I ran the setup 'thread' mine was booting fast for about a week and then started slowing down a tad. I could hear the hard drive hashing a bit more on boot. After about 3 days of that the automatic 'Layout.ini" boot file re-write occurred, it cleared and started booting like a rocket again.

When that happens from time to time you can force a boot optimize by running the RUN command line from the instructions and do a space defrag where O&O places the boot files at the beginning of the disk.

Your case is obviously different
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Re: FSX & SLI

Postby ATI_7500 » Thu Mar 29, 2007 1:07 pm

I'm gonna jump into the discussion again.

I went shopping yesterday and came back with an Arctic Cooling Freezer 7 for my CPU and six case fans. After three hours of fiddling about in my case, with the most complicated part being stowing away the cables, I was quite surprised at the temperature readings.

My CPU used to be 47
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Re: FSX & SLI

Postby Nick N » Thu Mar 29, 2007 2:19 pm

No apologies needed.

This is the internet. You do not know who I am or my credentials for posting such things so doubting information you may see is logical and it's simply being cautious. As long as you purchasing the right hardware for the job, take the proper precautions and understand what you are doing is without the direct supervision of an engineer like me or a trained specialist, you can learn quite a bit about how computers work.


As I recall you are on a 975x chipset motherboard. I do not know the BIOS or the board however simply by what you have posted thus far I think you have just hit the tip of the iceberg for CPU/FSB/Memory clock. The memory and FSB have the ability to run higher on that board assuming you have the right PSU and other supporting devices that may be needed. A bootstrap of the northbridge at 1333MHz may be possible too.

Newer Asus boards have a northbridge bootstrap of 1600FSB/401+Mem MHz (yes, that is 1+MHz out of sequence from the formula and what activates the bootstrap and remains @ 1:1 with the CPU at any value above 401MHz)

If the BIOS allows access to the speedstep, thermal control, shut those down and give you full control of the CPU internals. I see in CPUz the CPU is being Vcore throttled which is OK but if you wish better clocks you may need to shut the control down in the BIOS allowing full Vcore and Multiplier be available to the system.

If the CPU multiplier becomes available for down-clock or a reduction of multiplier, it can be dropped and the FSB/Mem raised. In some cases depending on the motherboard, the Core2 CPU multiplier can be dropped but not raised. Some allow no change at all. The processor you are working with should easily exceed 3.0g. I would suspect it could run around 3.4-3.8 as long as the Vcore, Memory and northbridge voltages are maintained correctly and manually.

Also, above 1333FSB, LDT needs to be reduced from 3x to 2x. (or from 600 to 400) Some BIOS
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Re: FSX & SLI

Postby Black ZR-1 » Thu Mar 29, 2007 2:50 pm

[quote]I am going to try an experiment this weekend on a slower tower using the numbers Black ZR-1 posted and reducing them based on the % difference between the CPU/FSB/Mem Video card Core/Mem in the systems. Since both towers are set up using the same maintenance thread and neither FSX install has been
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Re: FSX & SLI

Postby Nick N » Thu Mar 29, 2007 3:15 pm

[quote][quote]I am going to try an experiment this weekend on a slower tower using the numbers Black ZR-1 posted and reducing them based on the % difference between the CPU/FSB/Mem Video card Core/Mem in the systems. Since both towers are set up using the same maintenance thread and neither FSX install has been
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Re: FSX & SLI

Postby ATI_7500 » Fri Mar 30, 2007 10:05 am

As I recall you are on a 975x chipset motherboard. I do not know the BIOS or the board however simply by what you have posted thus far I think you have just hit the tip of the iceberg for CPU/FSB/Memory clock. The memory and FSB have the ability to run higher on that board assuming you have the right PSU and other supporting devices that may be needed. A bootstrap of the northbridge at 1333MHz may be possible too.


Bottleneck here would be my Ram. It's only DDR 667.

I could push it higher than 333 Mhz, but then I'd have to set my Ram timings to "by SPD" again to avoid startup errors.

Would be a higher Ram Frequency but slower Ram timings better than my current Ram setup?

Newer Asus boards have a northbridge bootstrap of 1600FSB/401+Mem MHz


Already been at 416 Mhz (as shown), but didn't feel comfortable.

If the BIOS allows access to the speedstep, thermal control, shut those down and give you full control of the CPU internals.


I already shut them down.

If the CPU multiplier becomes available for down-clock or a reduction of multiplier, it can be dropped and the FSB/Mem raised. In some cases depending on the motherboard, the Core2 CPU multiplier can be dropped but not raised.


This is the case here. I'm at 9 at the moment - highest avaiable.

I would suspect it could run around 3.4-3.8 as long as the Vcore, Memory and northbridge voltages are maintained correctly and manually.


Yeah, could be done easily, but as I said...I'm worried about my Ram not being able to take it.

[quote]Also, above 1333FSB, LDT needs to be reduced from 3x to 2x. (or from 600 to 400) Some BIOS
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Re: FSX & SLI

Postby Black ZR-1 » Fri Mar 30, 2007 12:00 pm

You should have no problems matching my specs. We're almost identical. Post back with your results when you hit that sweet spot....and what a sweet spot it is..
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Re: FSX & SLI

Postby ATI_7500 » Sat Mar 31, 2007 10:17 am

I'm slowly getting there.

First, I got rid of the "hacked" textures (;)) and started out again with a fresh FSX.cfg. Sliders were set like John suggested on page 4. I then applied your latest settings and they proved to be a good start for further tweaking.

A word about "my way" of testing: I'm not trying to have my FSX doing well during standard flight situation, but during times of maximum load on my hardware instead. This is why I'm only testing with lots of clouds and with complex add-on sceneries plus while flying "outside the envelope" (A321 without flight computers engaged - whee! :D).


What I've achieved till now is fluidity, no stutters, etc...next stop will be the looks. I've still encountered blurring ground textures when going faster than, say 300 KIAS.

I'm gonna play around with TBM (set at 400 at the moment), FFTF (0.45) and autogen values (very dense - 2500/1600) and check back later.
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Re: FSX & SLI

Postby justpassingthrough » Sat Mar 31, 2007 2:16 pm

I see another has crossed over from the dark side    Image


Good stuff!
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Re: FSX & SLI

Postby justpassingthrough » Sat Mar 31, 2007 2:19 pm

[quote]I am going to try an experiment this weekend on a slower tower using the numbers Black ZR-1 posted and reducing them based on the % difference between the CPU/FSB/Mem Video card Core/Mem in the systems. Since both towers are set up using the same maintenance thread and neither FSX install has been
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Re: FSX & SLI

Postby Black ZR-1 » Sat Mar 31, 2007 3:34 pm

It won't be long 'til others start crossing over

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Re: FSX & SLI

Postby ATI_7500 » Sat Mar 31, 2007 6:36 pm

Your settings are working very well, Black ZR-1.

Exception: TEXTURE_BANDWIDTH_MULT=360


But I'm not there yet...not yet...
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Re: FSX & SLI

Postby Black ZR-1 » Sun Apr 01, 2007 3:56 am

It took me over a month to get there, my friend. Patience is virtue.
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