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Author Topic: Old nVidia cards - sluggish performance with Coolbits on  (Read 1202 times)

Offline trodas

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Old nVidia cards - sluggish performance with Coolbits on
« on: July 31, 2015, 12:34:04 PM »
For some old school fun and testings I sometimes overclock really old hardware, like FX 5600XT or FX 8600GT, FX 6800GS, FX 6800GT...

Now for the FX 5600XT card I use old beta Forceware 45.28 that I modifield slightly and using these Coolbits let me improve the performance by overclocking the card:

Code: [Select]
REGEDIT4

[HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\Global\NVTweak]
"CoolBits"=dword:0000000f
"NvCplEnableHardwarePage"=dword:00000001
"NvCplEnableAdditionalInfoPage"=dword:00000001
"NvCplEnableAGPSettingsPage"=dword:00000001

(the only important part for the clock adjustment is the "CoolBits"=dword:0000000f.

The performance scale nicely and all is good... except some more modern 3DMarks require more modern drivers to operate.

Surprisingly using the modern drivers AND Coolbit overclock result in sluggish performance. For example 3DMark03 goes from 2551 to 563 marks:
http://hwbot.org/submission/2885484_
http://hwbot.org/submission/2885483_
Yes, on the Forceware v93.71 drivers I have a slightly different O/C (365/301 vs 370/305 on the old drivers), but nowhere near to "justify" such performance drop.

Now this is not specific on the 3DMark, all 3D apps go sluggish after using the Coolbits on more recent drivers. For example Aquamark3 - Forceware 61.76, stock 234/200: 13341 points: http://hwbot.org/submission/2885479_
Overclocked to 365/301 by Coolbits: 6640 points: http://hwbot.org/submission/2885477_

So there IS a dramatic slow-down, when I use more recent Forceware drivers (tried v61.76 and v93.71) AND Coolbits.

Same I observed on other mentioned videocards, like the FX 6800 and 8600 one, so it is not tied to the FX 5600XT only.


Therefore I look for more recent Coolbits, found there:
http://downloads.guru3d.com/download.php?det=815

Again, I used them at first completely, then removed them - for example that easily it could be done:

Code: [Select]
REGEDIT4
[-HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\Global\NVTweak]

...so I could strip them to the bare important for clock changes:

Code: [Select]
"CoolBits"=dword:ffffffff
Now this is different value that the 0000000f used before, so I hoped... and it caused the exactly same slow-downs. That make me a "bit" puzzled, so I started searching and I found third version of Coolbits:

Code: [Select]
"CoolBits"=dword:00000003http://en.wikipedia.org/wiki/Coolbits

It probably won't be any surprise now, when I write that this once again enabled the O/C possibility, but caused sluggish performance.

...

So I give up on Coolbits and used Riva Tuner. It does work w/o reinstalling on new Windows, the O/C is limited to 355/300 (600 effective) and once again - after overclocking, the performance go bad. Slow. Terrible. Even some image quirks, at 355/300, when 370/306 works nicely with old drivers.

...

Now could anyone tell me, what is going wrong there? Why Coolbits / or any O/C in general, cause slow down of graphic?

I hoped I could find someone else who had the same problem years and years ago, I manage to find some threads where people appear to having the similar troubles:
http://www.pcreview.co.uk/threads/coolbits.2806125/
"I just overclocked the GPU a tiny bit, the frame rate and graphics slow down and become juddery"

...but that is too few results from my search... so perhaps I doing something wrong, like overoptimizing by disabling the nVidia help service or the startup programs that was put there by the nVidia drivers install...?
Once again - if I did not touch the overclocking, the performance is like it should be. After Coolbits = sluggish speed.

Or could it be, that any WHQ nVidia drivers lock-out the overclock by intentionaly slowing things down and I could only use beta drivers for overclock?! Could that be? And where to get some old beta drivers anyway? There are all WHQ ones, except one Quadro Beta Driver:
http://www.nvidia.com/object/winxp-2k_archive.html
"It is dangerous to be right in matters on which the established authorities are wrong." - Voltaire
"I believe that all the people who stand to profit by a war and who help provoke it should be shot on the first day it starts..." - Hemingway

Offline trodas

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Re: Old nVidia cards - sluggish performance with Coolbits on
« Reply #1 on: July 31, 2015, 02:19:51 PM »
So, back to the coolbits problem:
Using MSI GeForce 210 (crap card, witch is why it need bump in the clocks like no other card there) I downloaded drivers Forceware 196.21 from there:
http://www.redway3d.com/drivers/Win_seven32_NVIDIA%20Forceware%20196.21.php
Hopping for alternative, unmodified source that WILL WORK with simple coolbites and enable the overclock.

Windows 7 32bit used.

Coolbits applied and - no change, NO OVERCLOCK! At least performance is not degraded. Used these coolbits:

Code: [Select]
REGEDIT4

[HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\Global\NVTweak]
"NvCplExposeWin2kDualView"=dword:00000001
"NvCplTvLocaleAutoDetect"=dword:00000001
"NvCplAllowForceTVDetection"=dword:00000001
"NvCplEnableActiveApp"=dword:00000001
"DisableApplyColorsAtStartup"=dword:00000000
"NoMenus"=dword:00000000
"OverlayPageState"=dword:00000000
"CinematicPageState"=dword:000000ff
"NvCplThermalSettings"=dword:00000020
"NvCplEnableScreenMenuPage"=dword:00000001
"NvCplCustomResConfig"=dword:00000000
"NvCplEnableAdditionalInfoPage"=dword:00000001
"NvCplDisablePerfQualPage"=hex:00,00,00,00
"NvCplEnableAGPSettingsPage"=dword:00000001
"CoolBits"=dword:ffffffff
"NvCplEnableOverlaySpanControl"=dword:00000001
"TwinViewCapsOverride"=dword:00000001
"NvCplEnableDesktopOverlapPage"=dword:00000001
"NvCplEnableTroubleshootingPage"=dword:00000001
"NvCplDisableRefreshRatePage"=dword:00000000
"NvCplDisableRotateAngles"=dword:00000000
"NoPages"=dword:00000000
"NvCplEnableClearViewPage"=dword:00000001
"NvCplEnableFanControl"=dword:00000003
"NvCplEnableFrameSyncPage"=dword:00000001
"NvCplEnableHardwarePage"=dword:00000001
"NvCplEnablenForcePage"=dword:00000001
"NvCplEnablePwrMzrOnDesktopMenu"=dword:00000001
"NvCplEnableRotationColorSettings"=dword:00000001
"NvCplNvThermPage"=dword:00000001
"PowermizerPreferences"=dword:00000000
"QTwkEnableModeChangeWarning"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\Global\OpenGL]

[HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\Global\OpenGL\Debug]
"ShaderObjects"=dword:00000001

Could anyone help me to make overclocking work back again with this little register tweak?!
"It is dangerous to be right in matters on which the established authorities are wrong." - Voltaire
"I believe that all the people who stand to profit by a war and who help provoke it should be shot on the first day it starts..." - Hemingway

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Re: Old nVidia cards - sluggish performance with Coolbits on
« Reply #1 on: July 31, 2015, 02:19:51 PM »

 

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