GeForce 8600 GTS, and having problems with overclocking? - 2007/12/10 21:49Hello, I have an XpertVision GeForce 8600 GTS card at stock speed, meaning 675/2000MHz. So I tried some overclocking with changing the BIOS with NiBiTor and nvFlash. First I put original BIOS file in NiBiTor and changed it. The 3D mode I set to 790/2000MHz with a shader clock of 1700MHz and give 1.50V, 1.55V and 1.60V for 3D mode. But when I run Crysis benchmark on voltages 1.55V and 1.60V the system crashed.
On voltage 1.50V the benchmark run but there was lines on the screen. So can anybody overclock that card so much? And what about voltages and NiBiTor is it working? I want to reach at least 800MHz for the GPU. Can anybody help me? Thanks, original BIOS is attached.
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Mavke
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Re:GeForce 8600 GTS, and having problems with overclocking? - 2007/12/10 22:03Oh, hold on... I think you have to take a step back and really first think of what you are doing. Are you really that keen on completely damaging the graphis card? I hope not. Now first can you flash back your card with the default original BIOS? Then you use first a program to overclock the GeForce 8600 GTS to see how far it can go with the default BIOS. So use a program like ATITool of RivaTuner to find the maximum overclocking of your graphics card and report back to us. After that we will take step two...
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pal
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Re:GeForce 8600 GTS, and having problems with overclocking? - 2007/12/10 22:20Okay, yes I can flash it back. I tried with RinaTuner v2.06 and at 750/2200MHz it works with the default BIOS, but more gives problems. Because of that I want give a GPU more voltage. I don't have a stock cooler I changed it with the Zalman VF1000-Cu.
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Mavke
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Re:GeForce 8600 GTS, and having problems with overclocking? - 2007/12/10 22:39pal wrote: Okay, yes I can flash it back. I tried with RinaTuner v2.06 and at 750/2200MHz it works with the default BIOS, but more gives problems. Because of that I want give a GPU more voltage. Good, that is the start so you could overclock to 750/2200MHz by using the default BIOS. Well now what I want to know is how did you increase the voltage via the BIOS? Cause your options of 1.50V, 1.55V and even 1.60V don't really look right to me nor that 1.55V and 1.60V are even supported by the BIOS as such. So maybe you can share as well those tweaked BIOS's?
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pal
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Re:GeForce 8600 GTS, and having problems with overclocking? - 2007/12/10 22:52I have increased the voltage in NiBiTor when I posted BIOS in and went to Tools and then selected the Voltage Table editor. From there I changed the voltages.
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Raptor
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Re:GeForce 8600 GTS, and having problems with overclocking? - 2007/12/10 23:58Okay, as Mavke stated, and I will stick with him. The voltages are only possible as 1.1V, 1.2V and 1.3V by changing to any other voltages in the editor you don't get that voltage. All you end up doing is confusing the card on what it's supposed to use. Use the stock BIOS for now found out your max clocks and see how long you can hold it. Then we can change the clock speeds in the BIOS.
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Mavke
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Re:GeForce 8600 GTS, and having problems with overclocking? - 2007/12/11 09:42pal wrote: I have increased the voltage in NiBiTor when I posted BIOS in and went to Tools and then selected the Voltage Table editor. From there I changed the voltages. Okay, well I have removed that BIOS you tweaked as it is done badly and you need to know that the voltage label is just a label and nothing more. The voltage selection and levels are all based on the VID's, meaning in each BIOS you normally have four VID levels, going from VID 00 to VID 03. Now on the GeForce 8600 GTS we have only VID 00 to VID 02 enabled from default and those give normally 1.1V, 1.2V and 1.3V. Now if you would change on VID 00 the label to 1.80V then it would not do anything as it is just a label and to help you guys what the VID 00 is really.
So now on the GeForce 8600 GTS you can add the VID 03, by changing the active entries and then the best way is to set the VID 03 with a label of 1.4V. And as explained that doesn't mean that VID 03 will really give 1.4V, that you will only be able to find out by setting that voltage on the 3D level and flashing the card and then see with a multimeter what voltage it represents. As stated every VID level has only one voltage and that is determined by the GPU not by the BIOS as such.
So what you need to do is to use yout original BIOS, only add the extra VID and set that on the 3D mode but no other changes! Meaning no changes on clock speeds and so on, then you flash your GeForce 8600 GTS card with that BIOS and you check if with RivaTuner or ATITool you can overclock the card higher and if you have a multimeter see to measure the voltage of that new VID 03 so we know what voltage it is exactly.
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pal
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Re:GeForce 8600 GTS, and having problems with overclocking? - 2007/12/11 18:59Nice explanation, I didn't know that, thanks! So complicated stuff, why they don't they make this easy like CPU overclocking? I will try and then I will post the results.
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pal
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Re:GeForce 8600 GTS, and having problems with overclocking? - 2007/12/11 20:59Hmm, I don't know! First I tried set VID 02 from deafult 1.3V to 1.4V on 3D and flashed. Then I clocked with RivaTuner to 770/2200MHz and works. But at 780MHz freeze at medium benchmark of Crysis. After that I set in default BIOS VID 03 and set it to 1.4V in 3D and the same. I don't know maybe I am stupid or I can't do it.
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Raptor
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Re:GeForce 8600 GTS, and having problems with overclocking? - 2007/12/12 02:21Is this what you want? If you are locking up at 780MHz but not at 775MHz core speed you have reached your cards max clock speeds. I can drop the 2D down to 550MHz at 1.2V just let me know. I left it at 1.3V on 2D and 1.3V on 3D with the attached BIOS...
ASUS 9800GTX+ (DK) PCIe 512MB - Rev 01
