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General Protection Fault using nvflash on GTX 465

post #1 of 11
Thread Starter 
So I was trying to upgrade my PNY GTX 465 to a 470. It's the correct revision and I checked for the extra memory chips and all that jazz, so I know it's capable.

I followed some instructions I found here on the site to make a bootable USB drive and used nvflash to load a GTX 470 BIOS. After doing so, it does indeed register as a GTX 470, but with only 352 cores instead of the expected 448.

Well, the 470 BIOS that I used was a reference BIOS because that's all I could find, so I figured that was likely the problem. After a bit of effort I managed to locate a PNY 470 BIOS which I figured is closer to the mark, but when I boot to the USB drive and call nvflash, I get a "General Protection Fault". I get this no matter what I do, "nvflash -4 -5 -6 PNY470.ROM" was the first thing I tried, then "nvflash -r" produced the same error, even just "nvflash" did it.

Anyone have any ideas?

Here's the full error:
General Protection Fault at eip=214; flags=3293
eax=fffab912 ebx=1d400000 ecx=00000004 edx=fffcd690 esi=000a9487 edi=00021d7e
ebp=fffab912 esp=0000075c cs=a7 ds=af es=af fs=8f gs=0 ss=8f error=0000

Help would be much appreciated. I'd love to see this thing reach its full potential!
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post #2 of 11
Well, if just typing in nvflash causes the error, then this GPF is obviously not related to the bios version. Have you tried just formatting then re-creating the info on the stick from scratch? Seems like it has to be some kind of data corruption that's occurred (either to DOS or nvflash) in the time since you last ran nvflash successfully.

BTW, if you used a Windows 98 dos image the last time, I recommend finding a copy of a dos image from ME. It's more reliable for this purpose, in my experience.

As an aside ... any 470 bios should work. The only difference between bios on 470s is the brand name (unless it's an OC version, of course). Not to bum you out but I'd be surprised if the issue is the fact that it's not a PNY bios. I've had like 4 different brands of 470 bios on my cards ... heck I've had an evga 480 bios on 'em that worked headscratch.gif
Edited by brettjv - 4/13/11 at 1:26am
    
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post #3 of 11
Thread Starter 
I haven't tried re-creating the stick from scratch, I'll try that tonight when I get home. Makes sense that it wouldn't be nvflash though, and I'll try to find a Windows ME boot disk. (Wow, so ME was actually good for something? Who'da'thunk?) Thanks for the advice!

I have heard tales of other people having similar issues where they flash their BIOS once and it gets them only halfway there for some reason, then they do it again and it works the second time. I think the person even used the exact same ROM both times, but I'm gonna try the PNY one just because I'm anal like that. I think the GPF is the bigger problem, and once I can get nvflash working again I can probably get it fully unlocked. I'll report the results smile.gif

P.S. I've heard sparse reports of people flashing their 465's up to a 480 like you mentioned, and actually getting even better performance than the 470. Any hints on that, or is it a risky venture and I'm better off sticking with the 470?
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post #4 of 11
Thread Starter 
Reformatting the USB stick did the trick for getting rid of the General Protection Fault, thanks! Unfortunately, I flashed a PNY 470 BIOS on it and still nada. GPU-Z says it's a GF100 GTX 470, revision A3. BIOS I used is 70.00.1A.00.03.

Registers as 32 ROPs, 352 shaders, 1024 MB memory @ 837 MHz on 256-bit bus. So apparently I got the memory clock of a 470 and nothing else. If I didn't know better, I'd say it doesn't have the hardware of a 470 after all, but I can look at the PCB and see the extra memory chips.

Any idea what's goin on here? Am I missing a step?
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post #5 of 11
What was the precise flashing procedure that you used? I mean, tell me what you did (I don't want to see a guide that you used, but instead I need your account of what you did).
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post #6 of 11
Thread Starter 
Booted into DOS on the USB stick, and before I did anything I did a "nvflash --save backup.rom" just in case (still have it).

After that, "nvflash -r" to turn off write protection, followed by "nvflash -4 -5 -6 ". Answered y/yes to all prompts. After it was done I rebooted using Ctrl+Alt+Del.

Used same process both times.
Edited by Pergatory - 4/13/11 at 11:36pm
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post #7 of 11
its either corrupted..

try doing..

nvflash -r

nvflash -4 -5- 6 rom.rom (use --index if you have multiple GPU's)

edit: seeing that you are doing the same as prescribed..Here's an explanation on what that error meant..

are you OC'd while flashing your cards??


edit1: try using this bios from a reference card i compiled with.. GTX 470 reference build 70.00.21.00.70

i am currently using those posted BIOS..so far its my best BIOS for my 470's
Edited by kairi_zeroblade - 4/13/11 at 11:52pm
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post #8 of 11
Ya, I figured the GPF had to be bad data on the stick. Nothing else really made sense.

Bummer that it's still not unlocking. BTW, you can't tell if you have the right chip from GPU-Z. Did you remove the cooler to see what chip revision you have? If you have the 275 printed on it then it should flash, if you have the 030, it won't. And I assume it's a black PCB, right? Cause blue PCB never unlocks.

I wasn't saying that my card flashed to a 480 or anything, just saying that any 470 or 480 bios should successfully unlock the card, the brand isn't relevant to the success. I do understand wanting the card to ID as the proper brand though ... I have the MSI 470 reference bios on mine.

P.S. the 480 bios actually isn't a good idea unless you have a card where the memory OC's unusually well. My card wasn't stable with the 480 bios cause ram won't do 924 or whatever it is ... but it did unlock it.

My advice is to remove the cooler and check rev no. the chip ... or if you can find a copy of the Asus 465 unlocking tool ... if that succeeds, then you for sure have a 275 chip and *should* be able to flash. All that app does though is unlock shaders, not the memory/bus/ROP's. If it fails, you have a 030 core. Either way is a reliable method but I've not seen that app in a long time.

Dunno what your 'return' options are, but newegg has the 465 SC in stock (had a nice rebate last week too) ... many have reported those unlocking recently.
    
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post #9 of 11
Quote:
Originally Posted by brettjv;13119676 
Ya, I figured the GPF had to be bad data on the stick. Nothing else really made sense.

Bummer that it's still not unlocking. BTW, you can't tell if you have the right chip from GPU-Z. Did you remove the cooler to see what chip revision you have? If you have the 275 printed on it then it should flash, if you have the 030, it won't. And I assume it's a black PCB, right? Cause blue PCB never unlocks.

I wasn't saying that my card flashed to a 480 or anything, just saying that any 470 or 480 bios should successfully unlock the card, the brand isn't relevant to the success. I do understand wanting the card to ID as the proper brand though ... I have the MSI 470 reference bios on mine.

P.S. the 480 bios actually isn't a good idea unless you have a card where the memory OC's unusually well. My card wasn't stable with the 480 bios cause ram won't do 924 or whatever it is ... but it did unlock it.

My advice is to remove the cooler and check rev no. the chip ... or if you can find a copy of the Asus 465 unlocking tool ... if that succeeds, then you for sure have a 275 chip and *should* be able to flash. All that app does though is unlock shaders, not the memory/bus/ROP's. If it fails, you have a 030 core. Either way is a reliable method but I've not seen that app in a long time.

Dunno what your 'return' options are, but newegg has the 465 SC in stock (had a nice rebate last week too) ... many have reported those unlocking recently.

highlighted: Make sure you get to check these too..else you're ground zero..new batches don't unlock to full 470's..

i think i still have that Asus unlocker..might go dig my drive later for that and send it to him..
Edited by kairi_zeroblade - 4/14/11 at 12:02am
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post #10 of 11
Run the windows version of NVFlash, create an autoexec.bat with the commands you want (like nvflash -4 -5 -6 biosname.bin/rom) and then drag it into the executable.
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