Modified overvolting vbios of GTX460m on G73SW.

Just found an interesting thing, stock core clock 675MHz needs memory clock 1400MHz to make up its bald power. Might want to flash the memory clock to 1400MHz if you don't want to raise your core clock. Well that's 1 FPS gained in Furmark.

 

Uhm, i dont quite get it. What are you trying to say Hackness?

675mhz needs 1250mhz as it is intended by stock. Why 1400?

 

In order to get the full performance of core 675 you need 1400MHz on the memory clock to deal with it, I just tested it with Furmark, did raise by 1 FPS.

 

I see, so nvidia choiche was to choose a conservative clock speed. Oh well. Ive flashed Jbmeth007 bios because it keeps me at 840/1680/1600 while mine doesnt, lol.

Mine likes 835/1670/1600, who knows why. I lost HDMI output thought, but vga still works fine.

 

The one you flashed with probably came from a G73

 

Yeah it does infact. Well im going to reflash my own bios, 5 mhz difference shouldnt be an abyss, althought i liked the idea

 

This 1v bios modded by Saltius works with perfection ! Pretty amazed how good it is as I managed to push core from 830(core) to 860mhz and 1660(memory) to 1720mhz from my old bios 0.95v !

Anyway it throttled down once when tried 870/1740 while playin BF3 and weirdly my freq memory cant go higher than 1728mhz (with 1740mhz selected). When that throttle happens, does it depend only on the core freq (too high) or memory freq ?

We know that the bandwitch of ur GPU depends on the memory freq so do you think it is worthy to reduce this bandwitch to up your core freq (like having something 875(core)/1600(memory) for instance)

My card only got up to 81 degrees after 3 hours of BF3 so I'm not too worried about the temp but dont know if it is really worthy to downclock the mem and upclock the core.

X6813/16F2 - i5-2410m - GTX460m@860/1720 1v - m4 128go - 2x2@1333 hyundai

 

How do we undervolt the 460m vbios for the G53SW? Or will this significantly drop the fps like when you are on battery? I wanted to drop the temperatures (if possible) while overclocking with 800/1600/1500.

 

How hot does your card get ? I get only 77 max playn few hours of BF3 with my OCing ! so I wouldnt be worried about ur freq tbh

 

I get 85 degrees celsius on a game called Vindictus. I wanted the temp lower so the fans would be quieter

 

The next step down is v0.8125, probably not a good idea.

 

I guess the next step is to flash a g74sx/g53sx vbios to our gtx460m..I wonder if that will still work?
This idea still keep bouncing around my head from quite a while..

 

so undervolting will make the fps drop?

 

no undervolting will not make frames drop. it will make your gpu unstable at overclocked frequencies, i haven't tried this because i have no need to. but stock is .91 on the asus 460m .95 is stock on the msi ive heard. .81 is voltage thats supposed to be for 2D if im not mistaken... I think thier trying to force the 2d voltage domain on 3d acceleration. If you can clock to 700mhz on your stock voltage, and clock to 700 on .81 you will have the same FPS given all clocks are the same, minus the additional voltage....

The pros would be a cooler running gpu = quieter gaming. less potential

 

Thanks for the info and I would like to experiment, but I don't know how to undervolt nor overvolt. It seems only Saltius and some others know

 

Hi,
I wanted to try OCing with modified ROM, but my original ROM version is different than yours

mine is 70.06.25.00.0C while everybody here has 70.06.25.00.07

I'm not going to reflash it unless somebody says it's ok. Looking with xvi32 into the ROM, most of the contents are the same, but bytes adjacent to the modified one are also different

0F 00 01 18 (with 0F 00 02 18 replacing it) in your version
0F 04 01 18 in my version

is it safe to modify it in the same way, or is it safe to flash the whole ROM with different version?

 

70.06.25.00.07 is an SW 460m

70.06.25.00.0C i believe is the older JW board

 

mine is EU version - G73SW-91015Z (the equivalent to 3DE)
.0C is "higher" version than .07, so why older?

 

and should I flash it or modify it or not?

 

maybe that explains it.. i did a search on .0C and .07

I always ran across .0C on the JW's and .07 on the SW's so i made the assumption that the .07 is the SW revision.

If you do flash the SW firmware to a JW i think you loose functionality... HDMI port specifically from previous comments.

Use Nvflash and get your bios name is xxxx.rom

then open in nibitor 6.03 and adjust fermi clocks accordingly..

Also i believe the bios has already been voltage locked in previous comments. Although it wouldn't hurt to post your bios named accordingly to exactly which computer you are using. benefitting those as well looking to mod thier vbios.

You mentioned that you have an EU version. perhaps salitus could compare the .07 and the .0C and look for differences.

you could also setup an usb boot stick with nvflash in autoexec.bat flashing back to stock if you have worries.

I'm not sure if there is much difference between EU and US via hdmi refresh i think thats all standard now. but i do know Analog is 50hz vs. US being 60. Specifically tied to voltage freqency in the house wiring on older tv sets.

I always wanted to know, when you buy an HD plasma TV in the UK, are they 100hz tv's and 200hz? or are they the 120hz and 240? given (PAL)(NTSC)

its a tough call, but make yourself a route back if things go sour

 

does this work for G53SW?

 

I already posted the exact version I had. My laptop is G73SW and not JW. I don't know whether the cards differ (doubt it though).

 

They do. SW versions have a different GTX460m, dev string reports as V2. Different bios, different memory chips and different vram timings as well.
They dont oc very well (like mine), but beside that, "virtually" the cards are the same.
Technically looking at nvidia tech/blueprints documents, the V2 in SW has some revised features,and is the one that is much "near" the gtx560m.

 

There you go, undervolted G73JW and G73SW vbios. 0.8125 at 3D clock. All I did was changing the 01 to 00.

 

I really need to give this a try when I have to time. My G73SW seems unwilling to clock past 800 core, which is a slightly disappointing number.

 

Did you try the v0.962 or v1.0 modded vbios?

 

Not yet, pretty busy with classes, and I'm a little nervous about attempting this until I can locate a solid guide on how to flash my VBIOS.

 

Well you don't need a guide in particular.
First you need a bootable USB drive, google for a guide, there are plenty.
Then you need nvflash, Im using 5.11 if I recall correctly.
After you copied nvflash content on the USB drive, copy the modded vbios as well and rename it in order to remember the name easily, like 1v.rom.
Reboot, after initial Asus boot logo, hit ESC until you see the boot manager. Select the USB drive, hit enter, and you'll find yourself in dos prompt.

From there, type:

Nvflash -5 -6 -A 1v.rom (-A needs to be in capital) hit enter

It should ask to flash the sub system Id since it differs, type Letter Y and let it run.
After it completed (it takes a few seconds, in which the num lock led should flash once) just type Exit, then shutdown the laptop with the power button.
Wait a few seconds, then boot it up again.

There you go, you should be in windows desktop with your brand new overvolted vbios.
That's how I do it, and I was the first one to attempt a flash with a modded vbios, even with the one that wasn't mine (which turned out to loose LCD screen but it was fine with VGA out..but it wasn't my vbios, it was from a g73jw).

 

Saltius Hello, I would ask a kindness to you.

Modify the VBIOS I am sending herewith to 0.926 Volts 3D

I ask that you use this VBIOS attached, because I think it works best on my video card. Do not ask me why rsrsrs

I appreciate your help! You really did a great job for us all!

 

Alright, I've gotten everything working with the USB and with nvflash, just made a backup of my VBIOS. My only concern is about the command to flash the VBIOS. I downloaded a later version of nvflash from here:

NVFlash 5.95.0.1 download from Guru3D.com

And they suggest a different command prompt (nvflash -f filename.bin ) for the flash. So, which prompt should I use? I'm a little too cautious to just try both and see what happens.

Edit: And of course I do realize the filename is dependent on the user, it's the -f instead of -5 -6 -A part that concerns me. I also notice the -A is not mentioned elsewhere in this thread.

 

These are the descriptions of the commands i use:

overridetype -5 Allow firmware and adapter PCI device ID mismatch.
overridesub -6 Allow firmware and adapter PCI subsystem ID mismatch.
auto -A When possible, run without user intervention.

About -5: devID could mismatch if youre not using your own modded vbios, but lets say youre using another g73 vbios. This is vital to flash the modded vbios as the DEV id probably mismatches.

About -6: subsystem ID usually shouldnt mismatch if youre using your own vbios. But as i stated above, it could. Basically each card has its own ID, as an example most g73sw uses 2047-48, my g53 uses 2046. Its just a number, nothing ground-breaking, but you need to specify this command as the one above otherwise the flash would fail, since the vbios has been modded.

-A is pretty self explanatory.

And about the version, im using this one http://www.mvktech.net/component/op...id,3183/chk,814ea0c4ccab9927756b7930d190cd95/

Which is the one available "officially" from MVKtech site, from Mavke, author of NiBitor. Id say i trust this more than the one over guru3d.

Dont bother about -S command or others,since nvflash will flash the specified vbios by default without other switches, by just inputting the nvflash xxx.rom name.

Forget user written guides, just look at the readme in the program:

-- Sample Usage --
nvflash --index=1 nv30nz.rom

As you can see theres no -F or -S switches. About the -5 -6 and -A, as i described those are needed for a clean flash without errors.

PS: if for some reason you lost lcd screen access, dont panic, keep a vga cable connected to a monitor. Beside the OS settings, the vga out will always work and is always "on". You can reflash your own vbios without problems with it.

 

Just tweak 01 to 02 as you already know.

 

Nvm now I see. Epic fail on my part.

 

Okay, I'm going to assume those commands will work with mine. The only issue I encountered was that the nvflash that you linked was unable to find my GPU, so I guess I'll just stick with the version I have.

 

Remember that you don't need the --index=1 command lol, that is for multi gpu users.
I was just copy/paste the line in the readme to show that there's no -f or -s switches when flashing.

 

Flashed in the .962 V VBIOS and it's working like a charm! Got up to 860/1720/1580 which got me 16259 in 3DMark06, but was a little unstable in my brief gaming tests. 840/1680/1580 works perfectly for gaming (got rid of some slowdown in Crysis when there were a lot of enemies around) and still gets 16099 in '06. I can probably push the VRAM a little higher and I'm anxious to try the 1 V VBIOS, but that'll have to wait until I have more time on my hands. Only downside is the temp increase, but I still seem to stay under 80C as long as I'm gaming, not running Furmark.

 

Thank you friend!

Now I understand how I make the change in "xvi32." I had missed before. I learned now!

but unfortunately did not work perfectly here, as before shutdowns occur.

Relmente this shutdown protection is incorporated in the VBIOS.

because with the VBIOS 0.912 I can stay stable at 800Mhz.
already with the 0.926 VBIOS System Shutdown occurs after a few minutes of Mafia 2. even though at the same frequency 800Mhz


One thing I can rightly say.

There is not no protection on the motherboard that is causing these shutdowns by the GPU.
I did a direct connection between the MXM boards and power supply, and yet the termination takes place.

That is, is directly connected to the card MXM.

I suppose it's the VBIOS it has some configuration to cause the shutdown under load up to 100%.

One thing is that inteçante configuring the VBIOS with the clocks, the Param shutdowns. over only the tension of 0.912 Volts.

 

Well I am an idiot, I did not see his post that he hex edited. Thanks lol

 

Here is the modified vbios.

PS:I guess you already did the tweaking all by yourself.

 

Thanks anyway and temperatures seemed to drop a bit (need to just play a real game now) I managed to overclock up to 700/1400/1500. If I get up to 701 with 1500 memory overclock it crashes the drivers. But with stock 1250 memory overclock I can go up to 712 I believe. What exactly does memory do? And do you guys think I should stick with my setup or go with 712 mhz?

 

Looks like Crysis is actually getting some slowdown with my OC now, but everything else (Crysis Warhead included) has shown noticeable improvement, guess Crysis just doesn't like overclocks.

Anyway, are the VBIOS labeled G73SW_1Vtest or something like that my best bet for a 1V overvolt, or should I try modifying my own (with instructions of course)?

Edit: Nevermind, read back more and realized the 1V doesn't exactly work.

 

Neither does .96 they both work with the fact that they do overvolt, but the board will shut off on your during approximatly 20min of gaming on crysis2

I'm pretty sure its directly tied to a thermal protection on an unsinked VMU Which one i don't know. need to know more about the protection circuitry on this particular card to figure it out..

On the bright side of things though. good thing were not popping them like the gtx590's they are scary bright and hot when they go up in smoke, (flame)

 

After further testing with the undervolt i maxed at 714/1428/1250. But at 700/1400/1500 it scores higher? At 700/1400/1625 it hits the same numbers as 700/1400/1500. So I guess my optimal setting is 700 mhz?

 

Because the transfer speed at memory clock 1500MHz is already fast enough to match the maximum processing power of the current core clock, if you go higher on the memory clock, it won't make any differences unless you raise the core clock.

And I think the reason that 700/1400/1500 scores higher than 714/1428/1250 is probably because the amount of data that can be processed by GPU is limited by the memory clock, which means you weren't fully using the GPU's processing power at 714/1428/1250 because of a smaller bandwidth. From what I had found when I was testing my GTX460M, the core clock at stock (675MHz) needs at least 1400MHz on the memory clock to use its full processing power.

 

I'm trying to modify my BIOS on G53SW, any clue in where should start?
I looking for a program to read the original BIOS and make changes in devices.

 

No no, youre getting it wrong.

the score difference is all thanks to the memory bandwidth. See, if you keep your memory at 1250, basically stock clocks, the bandwidth cant feed proprely the texture fill rate, therefore it createas a bottleneck.

When you raise your vram clock to 1500, which is the average OC starting point, you get enough bandwidth to feed clocks in 675-700 mhz range, being 1400 the "optimal" for 675 mhz.

At 1625 youre creating a bottleneck in the opposite way: the texture fill rate is still lower than the bandwidth achieved by 1625mhz; to optimally utilize that memory clock you need an higher core clock.

I would say that the optimal core clock for 1600 is 800mhz. At that clock, the vram can feed the core clock even when higher clocks are reached such 840/50.

Dont waste power and heat if you plan to have such low clocks like 700mhz, which is a mere 40mhz increase by stock speed. whats the point of having it?

I would understand 775mhz like GTX560m...but 700?

Raise those clocks! I bet youll be fine at 800/1600/1600. Thats the golden number for both performance and gpu resources scaling.

 

I've undervolted so increasing that high is kind of... impossible lol. Unless you know how to get past the nvidia drivers crashing then I'm not sure if I can go further. Any tips on how to push further would be appreciated .

 

The only way to push it further is to overvolt it. At v0.8125 anything higher than core clock 725MHz will go unstable, at v0.9125 it's around 825MHz and at v0.962 it's around 870-880MHz. And yes if you overvolt it, you are more likely going to see your GPU running at 84~90C, that temperature is actually still OK.

 

Those clocks still heavily rely on the quality of the gpu itself, if it's binned or not.
As an example v1.0 makes me stable at 835 but I can't go further. Just pointing that out.
JW versions seems to oc higher thought.

 

Alright I stopped undervolting and went back to default stock. I might consider overvolting. On stock volt I am at 815/1630/1600. Should I go for the .9625 voltage or 1 voltage vbios?