Old Topic...8800MGTX Overclocking...

So hello everybody...
I've been hanging around in ths forum for a while now. And after reading a great number of reviews I landed my self with a pretty good np5793. I 've been havig a lot of fun with it. But there is always one thing I want to do-verclock 8800MGTX. After reading some threads in the forum and following the steps. I found that I was not able to overclock this baby using NibiTor(won't read Bios). Can anyone tell me what to do? Thanks...

 

make sure your using the most recent version of nibitor >.> or know how to use it.

 

Well, I am using Nibitor 4.0.5, I don't know if it's the newest edition. and do I have to use nvflash to copy my VBios first?

 

no you do not. Start nibitor, select tools, select read bios, select "select device,select your 8800m gtx. Then select read bios, click read bios into nibitor and your set to edit your vbios. I'm actually doing some changes right now.

 

I can`t say for sureif it'll work for you, but on my XPS, I use Nvidia system tools to OC.
And 600/1550/900 raised my load temps by 1C.
Almost like the 1730 was made for OCing...

 

I could never get NiBiToR to read my 8800M GTX. I used nvflash -b backup.rom to create a backup of my rom, then loaded it into NiBiToR. I was then able to OC the system and pop the VID up to 1.05v. You should be stable at 620/1550/980.

 

Just to add to the excellent walk thru from bwhxeon.

Once you select “read bios into nibitor”, it’s better at that point to save the bios and read/edit the saved bios. File-Save Bios-name it and save it to a folder. You could make two copies of that bios, and name one 8800MM and the one you’ll be editing 8800M. Once you saved the bios, then choose open File-Open bios and select the bios named 8800M. Make sure you’ve already made a bootable usb flash drive. You will put the one bios already on the flash drive named 8800MM.rom, you will always keep it there as a backup rom falls something don’t work. Do not modify it at all; leave it as is because it’s the default bios for your card. Now, getting back to the bios named 8800M.rom that you are now reading with nibitor. First tab “Clockrates”, you can edit everything but right now you’re looking to overclock. So under Clockrates you will be most interested in “Extra” clock settings. Your card should be able to handle Core (600), Shader (1500) and Memory (950). Once you have selected those clocks, click on the “Voltages” tab. You will get a “pop-up” warning, just click ok to proceed. Now you’re interested in the “Extra” drop down menu, where you will see 1V. You will click on the drop down menu and select 1.05V. Now you can verify that everything is like you wanted for the things you’ve changed, and now save the bios. Just save it as 8800M. File-Save bios and place it on the usb flash drive alone with the default bios you named “8800mm”. You’re all set! Make sure you have nvflash on the bootable usb drive alone with both bios, restart the computer making sure you have it to boot from usb drive.

At the \C: prompt type this NVFLASH 8800M.rom then enter. It will ask if you’re ready for the flash, just click on Y for yes, sit back and wait a few seconds till you see flash is a success and you’re back at the C prompt. Remove flash drive, and restart the computer. You can verify your clocks using GPU-Z, or whatever you use to check them with. If you want to further modify the bios, and then use the bios you just flashed with and leave the default one intact. If you feel you need to revert back to the old bios, just do the same thing only this time you’re going to use the 8800MM.rom (which is the default bios). Of course renaming is a personal choice, and I’ve only put what I use YMMV!

If you find the clock setting are unstable, then use 550/1400/900. You will have to experiment to what is best for you, and most of all have fun at it!

 

If you're running vista x64 nibitor probably can't read your bios, but gpuz can. click on the little chip icon next to the bios version number and save it to a folder, then open it with nibitor. GPUZ will save the bios as a .bin, but nibitor can read it, just make sure to save it as a .rom from nibitor so nvflash can read it.

 

Yeah...Thanks Guys...But I was wondering how can I make a bootable usb stick to flash my vbios. I tried a lot of softwares but failed.(The usb stick I am using is a samsung mightydrive). Can anyone help me with that?

 

What would be best to do? Overclocking the CPU or the GPU?
I have a 2GHz Merom and a 8800M GTX...

 

zfactor has a great guide on making a bootable usb stick here

 

You can use setfsb, but that will overclock your cpu and gpu. I would recommend only overclocking the gpu.

 

If you want overall better performance, FSB overclocking is the way to go! This has been known for years in the overclocking world. FSB overclocking will give you better performance because it not only overclocks the CPU, but also your RAM. If you’re just looking for 3D performance, then overclocking just the GPU will do that. The GPU is not overclocked from FSB overclocking; the PCI bus will have a higher frequency which will also raise the frequency in which the GPU, HDD and other peripherals connected to the bus will operate. Now some say the PCI/PCI-E controller is automatically raised on the 570RU, I don’t agree with that totally. If you use FSB, there are two sliders; one controls the CPU/RAM and the other the PCI/PCI-E. Now if you play with the bottom slider (for PCI) by raising it to a higher frequency, you will notice that the system will become unstable when raising it beyond 42.7 instead of the default 33.3. So if FSB is indeed raising the PCI bus while still showing it to be at 33.3, then I wonder just how much it is being raised, since the computer is totally stable depending on how much your RAM/CPU can handle while still showing the PCI at 33.3. My system is only stable at 3.1 if I use one stick of RAM, and one overclocks higher than the other. One stick will do 3.1, while the other stick does 3.078 stable. That is ok, as I expect my overclock results is RAM related. I will eventually upgrade to PC2 6400 and see what it does, since it has higher RAM speed.

You do have the option of overclocking both CPU/RAM and GPU, but your results will vary. I guess there is not enough power being generated by the system board to max out both CPU/RAM and the GPU. Once you have to raise the voltage on the GPU, the max overclock on the CPU/RAM is lowered quite a bit. But one thing I can tell you for sure, overclocking the CPU/RAM gives impressive response time while working in a windows environment. Applications open faster, and of course encoding really blows away default. When encoding a movie at default, my encode time is 18 to 20 minutes. When I’m running at 3.1, the encode time is 12 to 15 minutes. My math is not that good, but the numbers seem impressive! I doubt you will notice any difference if you decided just to overclock the GPU, as that will not have any effect on encoding or opening applications.

So I guess I’m saying it depends on what you want to do most? Remember, FSB overclocking will also help in gaming since the RAM is also overclocked. So you’re actually getting the best of both worlds overclocking the CPU/RAM, instead of just the GPU overclock. Just overclocking my system to 2.8 (which is nothing but a 300MHz overclock), proves to be very beneficial as well.

 

Alright, thanks for the info kobe_24