Mmm...I've also tested it...no change! I think that VMOD isn't functioning... But if someone can measure it on the card please do it..
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Mmm...I've also tested it...no change! I think that VMOD isn't functioning... But if someone can measure it on the card please do it..
I'm assuming it's a hardware limitation then. I downloaded the 6800GT's BIOS to compare to the Ultra and when you do the 'Extend Voltage Tables' on the GT it will actually show a 1.6v even though I believe it runs at 1.3v normall.....so I think if you can't have the voltage be shown it simply wont work even when editing the text. Just my guess though. Without someone measuring the voltage spots we wouldn't know for sure....but I'm going to be using the eVGA step up program and sending this card back in to upgrade to the 6800GT so I'm kind of paranoid about trying to measure it and accidentally frying it
I'm having problems running two 6600GT's in SLI, one is Gigabyte and the other one is Leadtek ... Whenever i plug them in only one works, and it says to remove the "non SLI-capable" card. I thought of flashing both with the same BIOS but they are of different size, Gigabyte's is 64000 bytes and Leadtek's 64512 bytes, so i just modded the Gigabyte BIOS with Leadtek's settings from Nibitor and re-flashed it ... useless. The mobo is DFI Ultra-D modded to SLI, i used 2X6800 in SLI before so that works ... i was wondering if you guys have any ideas on what else i could do ... any kind of help is welcomed.
I don't think you're going to be able to get it to work with 2 different companies brand cards.
Well, if it wasn't for the extra 512 bytes is Leadtek's BIOS i could probably manage to make it work. I've seen cards from different manufacturers in SLI before (Leadtek + Gainward), so it's not impossible.
Why didn't you just flash them both with the same BIOS. Basically they are exactly the same card from different manufacturers. And bIOS size is unimportant as long as it isn't bigger than 65k !Quote:
Originally Posted by Micutzu
Presumably flash the card that is not being accepted by the SLI setup ?
Well the Leadtek has board ID 4300 and Gigabyte has D700, so i'm thinking they might not be really identical ...
Many manufacturers appear to have set their 6800GT's GPU volts at 1.3. However, the 6800GT BIOS can easily be changed to set GPU at 1.4 or 1.5v if wanted. Mind you, 1.5v on the GPU is not advisable unless you are using water cooling !Quote:
Originally Posted by Nubius
The only main way they can be incompatible with each other, is if one were PCI-E and the other was APG type. But since both in your case must be PCI-E, I don't really see aproblem.Quote:
Originally Posted by Micutzu
What are the main differencies you know about them. For example, do they have diff memory size and type ?
Do they look different, and why ?
No, they're identical as far as the aspect is concerned ... both 128MB and even use the same memory chips. I'm not even sure i could flash a BIOS of a different size on any of the cards though.
Since VGABIOS is run in DOS, the bios file name can only have max of 8 chars in front of the dot, and max of 3 chars after the dot. Otherwise DOS will not recognise the vgabios command. Your bios filename has 9 chars before the dot ?Quote:
Originally Posted by Nubius
Flashing of a vga bios is very simple, but it must be done in real DOS. Usually using a DOS bootable floppy !Quote:
Originally Posted by Micutzu
And in your case, it is probably better removing the second card from your sli setup.
So you would Flash your BIOS in DOS using nvflash.exe v5.13
nvflash -r (removes any protection)
nvflash -b ORIGBIOS.ROM (saves original bios)
nvflash -4 -5 -6 BIOSNAME.ROM (flash new bios file)
However because of DOS filename restrictions, "ORIGBIOS.ROM" and "BIOSNAME.ROM" must have max of 8 char's in first part of filename and max of 3 char's in extender part, otherwise DOS will not recognise the command.
And note, the -4 -5 -6 command switches will force a flash regardless of any ID mismatches.
But obviously always make sure you ONLY flash a AGP type card with a supporting AGP bios, and a PCI-E type card with a supporting PCI-E bios !!!!!
EDIT:
People who flash BIOSes, whether they be mobo or VGA, should never do so unless they also know of a recovery solution, just in case of the unknown !
And recovery of a VGA BIOS usually means access to a second, usually PCI, card. Failing that, recovery can also be done by a Blind Flash, where you simply put the Flashing commands in the booting floppy's Autoexec.bat file. In this way the flashing command is automatically run while booting to DOS. Of course, this also requires that you set the Floppy as the first booting device in the mobo bios setup options.
Yeah but nibitor has those higher voltages selectable in the drop down menu whereas to set 1.5v for a 6600GT takes editing the HEX inwhich then if you reload that saved BIOS, the drop down menu won't show anything. This basically tells you that the 6800GT doesn't have a limitation and will accept those higher volts since it's in the drop down menu but not the 6600GT.Quote:
Many manufacturers appear to have set their 6800GT's GPU volts at 1.3. However, the 6800GT BIOS can easily be changed to set GPU at 1.4 or 1.5v if wanted. Mind you, 1.5v on the GPU is not advisable unless you are using water cooling !
Hmm crazy, didn't know that, previous BIOS name was BIOSVOLTS lol so again that's 9 characters...oh well I'm sending in my 6600GT to eVGA and stepping up to the 6800GT sooo I'm not gonna bother with it ;)Quote:
Since VGABIOS is run in DOS, the bios file name can only have max of 8 chars in front of the dot, and max of 3 chars after the dot. Otherwise DOS will not recognise the vgabios command. Your bios filename has 9 chars before the dot ?
NiBiTor doesn't actually measure anything, it only translates the Performance Level Indicator values stored in a BIOSes GPU volts lookup table. The 6800GT's lookup table binary string for 1.4v is "8C01", and for 1.5v is "9603". It is the "8C" and "96" parts that NiBitor translates, but it is the "01" and "03" parts which are used as a bit mask to cause the volts to happen.Quote:
Originally Posted by Nubius
If NiBiTor does not allow a proper dropdown menu for your 6600GT BIOS, it is probably because it doesn't yet fully support that particular bios. It is a developing tool, so maybe with next update ?
:) i'm flashing video BIOS'es since the GF2 era mate, i know how to do it :) My problem was WHAT to flash really, not how to do it. Anyway, long story short, i did it, i flashed a modded Leadtek BIOS on the Gigabyte ... i had to modifiy the board ID from the Leadtek BIOS with the one found in the Gigabyte BIOS, but Nibitor was showing it wrong (D700 when in fact it was 4301) ... a little messing around and i found it, not it's working hehe ! Thank you for the support.Quote:
Originally Posted by jimmor
I know all of this already. I'm just saying the 6600GT BIOS's dont have it basically 'implemented' like the 6800's do. That's why a lot of people with an ultra will flash with a GT BIOS because of faster RAM timings, but will need nibitor to raise the voltage to 1.4(or was it 1.5?) like the ultra should be.Quote:
NiBiTor doesn't actually measure anything, it only translates the Performance Level Indicator values stored in a BIOSes GPU volts lookup table. The 6800GT's lookup table binary string for 1.4v is "8C01", and for 1.5v is "9603". It is the "8C" and "96" parts that NiBitor translates, but it is the "01" and "03" parts which are used as a bit mask to cause the volts to happen
No problem, glad to help !Quote:
Originally Posted by Micutzu
By the way, other than by you just telling me, I had no way of knowing how much you know about flashing bioses, or anything else for that matter.
And for interest, why did you feel the need to modify a board ID ?
The -4 -5 -6 command switches of nvflash program are specifically included to ensure that the program will ignore all ID discrepancies.
Just to clarify things, if only for me ?Quote:
Originally Posted by Nubius
My understanding of things is that a typical 6600GT has 2 options in its GPU volts lookup table, "8200" and "8C03", which is obviously translated by NiBiTor v2a as 1.3 and 1.4v. The table can however have 4 positions, ie the missing "01" and "02" options. However not having a 6600GT, I have no info on what voltages either of those bit masks produce ?
On the other hand, a typical 6800GT GPU volts lookup table, which is also four option, will typically show as 1.1, 1.3 and 1.4v. The 1.5v option of "9603" must be added with a Hex editor, because for some unknown reason when added by NiBiTor v2a it shows up as a 1.6v option ?
Hmm, i didn't know there was a -4 ... and by using only the -6 command switch i always got "board ID mismatch".Quote:
Originally Posted by jimmor
It isn't actually documented, but the -4 command switch forces a flash regardless of any ID differencies. So it is important to only use it where it is known for example that there is no GPU chip incompatability.Quote:
Originally Posted by Micutzu
OK, didn't know that, 10x.
For 6600GT:Quote:
Originally Posted by jimmor
1.1V-6E
1.2V-78
1.2V-82
1.4V-8C
Hope it helps.
Thanks, all information is good.Quote:
Originally Posted by Micutzu
Hi, i'm new here, can anyone mod my BIOS to 1.5V please?
Also my BIOS is unoverclockable, don't know how to bypass it? Any ideas?
File attached, thanks a lot
According to the posting from Micutzu above, a 6600gt can have max of 1.4v via a BIOS option.Quote:
Originally Posted by te_le_com
And NiBiTor v2a shows your linked BIOS to already be set at its max of 1.4v in both 2D and 3D modes. So only way to get 1.5v is by hard voltmodding to your card !
Also, there are no unoverclockable bioses/cards, so not sure why you should think you have one ?
Rivatuner is a good tool for overclocking, however it is important that you you first enter Rivatuner's database via the "Power User" tab, "Overclocking" sub section, and Enable the "DisableInternalClockTest" option. Otherwise any overclocking attempts will automatically fail.
The Internal Clock Test is the reason many people have overclocking problems when using either coolbits or rivatuner !
Well if you do extend voltage tables you'll only get lower tables....I figured it was all up the BIOS whether or not nibitor would see the ability to raise the voltage beyond 1.4Quote:
My understanding of things is that a typical 6600GT has 2 options in its GPU volts lookup table, "8200" and "8C03", which is obviously translated by NiBiTor v2a as 1.3 and 1.4v. The table can however have 4 positions, ie the missing "01" and "02" options. However not having a 6600GT, I have no info on what voltages either of those bit masks produce ?
I also notice that in the GT bios it jumped from 1.4 to 1.6 but 1.5 wasn't available....why? No clue....I figure it has to do with the card makers limitations or something along those lines, because I've already changed the hex for 1.5 voltages, a couple people have tried it and no hotter temps or better OC, so I assume it simply wont work. It's at it's 'hardware limits' if you well, whereas a GT obviously has a resistor that can handle more voltages, and the BIOS regulates it or something like that