dph314

Read my reply to you here and don't mess with anything.

Yeah I guess I'll leave them all alone if there's no guide out there.

Well I did the flash and everything on the 310.99's I had installed. Did a clean install of the 320.00's and now I'm stuck at 135mhz core, even with 100% load. Weird. Going to try installing the drivers again. Must be the drivers since I restarted after the flashes in the OP and everything OC'd beautifully with Precision, then with 320.00...135mhz.

Everything went splendidly You're the man svl7.

So...took a tour of the new BIOS and was just wondering what the TC1 and TC2 settings do if the values are changed? I know better than to change random settings, so, I'm just asking if anyone knows for sure. Because I saw the word 'throttle' in the description...and I really hate that word. I ran ThrottleStop and both cores stayed at 100%, so I don't think it was throttling at all. But if those settings disable it for good then I'd be willing to do it, if anyone knows about them. There was one other setting that looked like it was asking to be changed, but I forgot what it's called now. Would have to do a restart to look again.

Basically just wondering if there's a guide to the unlocked BIOS settings. Either way, thanks again svl!

Given that one follows the instructions to the letter, is it safe to do these mods to the BIOS? I.e can something go wrong / brick the laptop.

I would think not much can as long as you actually are following the directions carefully. And if there was any major problems with this process I think we would have heard about them by now. So...I'm sure it's fine. Speaking of which...going to start doing mine now. Wish me luck

I do not have 750M SLI. They don't yet have the Y400 gt750M ultrabay for sale and do not sell the Y500 gt750m ultrabay part separate from a "IdeaPad Y500 Laptop - Dual Graphics - 59371963" unit which already has it installed. As far as playing with the voltage I the slider on nvidia inspector worked (I've not had time to install anything more to verify changes or anything so it could be it did nothing). I'll take dump of my bios next chance I get.

As far as updating drivers, if you use anything beyond lenovo's drivers right now you have to manually add your laptops hardware id info to nvwin.inf as the GT750m doesn't exist (GT740m does in latest beta's though) in the drivers folder and to install beta drivers you first have to reboot your machine with test signing turned on but that gets tricky with secure boot enabled...

to update drivers these are the shortest steps I've cobbled together

1. Windows Key + X

2. Select "Device manager"

3. Expand display adapters doubleclick on your video card

4. Look at detail tab, in property drop down select "hardware id"

5. note your Ven, Dev, and subsys values mine for example is "PCI\VEN_10DE&DEV_0FE4&SUBSYS_380217AA"

6. visit LaptopVideo2Go: Drivers populate device search field

7. Download inf file for driver you attempted to install overwrite in the extracted location (location for me was "C:\NVIDIA\DisplayDriver\320.00\Win8_WinVista_Win7_64\International\Display.Driver")

8. Windows Key + R

9. Enter “shutdown.exe /r /o /f /t 0″ – this tells the computer to restart and prompt how you want to start

10. The system will restart to a menu allowing you to change how it boots.

11. Select “Troubleshoot”

12. Select “Advanced options”

13. Select “Windows Startup Settings” – this will restart Windows and let us change the boot options

14. Click “Restart” button

15. System will restart to “Advanced Boot Options” screen

16. Select “Disable Driver Signature Enforcement” – this tells the computer to booth without forcing signed drivers.

17. Reboot the computer and install the driver from the extracted folder (for me it was "C:\NVIDIA\DisplayDriver\320.00\Win8_WinVista_Win7_64\International\setup.exe")

18. Reboot disable driver signature enforcement will be enabled again.

Yeah if you have fewer than 5 posts your posts will be reviewed before they appear hence the delay.

We know about using .bat files with Nvidia Inspector and that is how everyone overclocked before this modded BIOS was available. The problem with that method is you are limited to +135 on any drivers after 310.90 and as of 320.00 BETA that has not changed yet. Obviously using such old drivers to play any of the newest games is not feasible since optimizations and SLI profiles for them are missing. The modded BIOS and vBIOS allow you to overclock past the +135 MHz core limit on any driver version and also makes the overclocking process much easier since you can simply use something like MSI Afterburner and move the sliders instead of having to create custom batch files with Nvidia Inspector. If you read Mobius 1's thread on NBR where this method originated from you'll see he explicitly wrote that you should check for a BIOS/vBIOS mod before using that method.

Also, you shouldn't overclock in P5 as the core voltage is lower than in P0 and this will limit how high your core can go. P0 is the highest performance state and this is where you will get the best results.

Ah, I see. So then I will have to do this before updating the drivers, thanks. Didn't read the NBR post I don't think. I don't remember how I ended up here, had so many pages open looking for an answer. Glad I finally landed here

But yeah I'd use the P0 state if I could, but I can't get any clock adjustments to stick for some reason. I'll recheck the .bat file. Or just flash and OC normally, like you said. Well, I think I have some decent 650's then. I was locked into the mid p-state and was perfectly stable in SLI at 1050mhz/4800mhz. What are some of the average OCs people get here with their 650m's?

@dph314 The V2.02 BIOS mod flashes the BIOS and the vBIOS of the internal GPU. If you have SLI the vBIOS of the Ultrabay GPU needs to be flashed separately using NVFLASH. Just follow the instructions in the OP to the letter and you'll get it.

@NotListed How did you "play with voltage?" As far as I know GPU voltage control has not been unlocked yet. Increasing voltage does nothing for increasing VRAM overclocking headroom, just the core. I'm not surprised you can't push the memory much further because it is already 500 MHz higher than the 650M and if they are using the same quality VRAM chips then they've already used up most of the OC headroom at the factory. The reason you are not getting around 7600 Physics score every time is because you are not using ThrottleStop.

Thank you very much. I seem to have overclocked without the flash though. I don't know if my posts are going to pop up eventually or not, seems like a mod keeps deleting them (they have to be reviewed since I have less than 5). But yeah I just ran 1000mhz core 3dMark11 run and I haven't flashed anything yet. How is that? Is it because I'm using the 310.99 drivers and in order to overclock like this with the 320.00's I have to do the flash in the OP?

Do you have to do this flash to overclock period, or just over +135mhz? I couldn't at all on the 320.00 drivers, so I reverted to 310.99 and still couldn't. But I been messing around with some other guide, using the .bat file / Inspector method, and now I can overclock to anything I want. If I update back to 320.00, will I lose this ability?

I didn't flash to the BIOS in the OP yet, so I don't want to go back to 320.00 if it'll mess my overclock up. I ended up doing it by using the parameters in the batch file for Inspector, but it locked me at 400mhz core clock. I overclocked the middle p-state in Inspector and voila, core overclock. Running 960/2400 now. But to OC the memory, I have to adjust the offset in the highest p-state. So...it's kind of weird. But the combined effort of overclocking the core in one p-state and the memory offset in the other allows me to up the 650m to my liking.

The option for this is in the BIOS? I have practically nothing in mine, but I still have the one it came with on here. I'm waiting until my post count goes up so I can download the attachments. But yeah is that option to adjust what temp the fan kicks in in the modded 2.02 BIOS but not the original one?

There's no way to increase the voltage on Nvidia cards is there? I mean...the Lightning after a flash and the Classified with EVbot, but not mobile versions I don't think.

Hello everyone. Just signed up Just bought a Y500 and tried to overclock the 650's about 10 minutes later. But much to my dismay...yeah. So...I tried following the guide in the OP but I can't download any attachments yet.

So in the meantime...just wanted to ask...that flash to BIOS v2.02...that's the laptop's BIOS being updated? And it flashed the first 650 to an unlocked BIOS along with it, and then you use nvflash to do the Ultrabay one afterwards? I've used nvflash on my desktop a bunch of times. Just wondering how this process differs, since it seems the guide says to only use nvflash for the second 650 and not the first, if I'm reading it correctly that is (sorry, really tired, and a bit frustrated that Lenovo decided to lock this thing down so much).

Thanks for everything you've done svl7, and to anyone else too who can offer me any details on these questions.