de-zwaluw

New unlocked vbios for sli 650M ultrabay card.

And for sli 750M ultrabay card.

@Klem Nice stuff, thanks! I was able to run the second GPU OC'd to 250MHz, but past that (at least in Bioshock Infinite benchmark) stuff crashes. I notice that voltages for my internal GPU run higher because of unlocked voltage offset, so I guess I would be able to push to +400MHz for second GPU if voltage was unlocked here too. Please unlock this or set it to +200mV like I have for my internal GPU!

Really? When I did a clean install of Windows 8, my Bluetooth was fine before installing any drivers. It was only after I installed the Intel driver that it started disappearing after sleep, hibernate, and Hybrid Shutdown.

So does that indicate that Lenovo has done something to Windows in such a way that once Intel drivers are installed, stuff completely breaks down unrecoverably unless clean install?

Well that's the million dollar question, isn't it? Try uninstalling the Intel Bluetooth driver and using the generic Microsoft one that came with the OS. I know for a fact that it doesn't suffer from the same problems, but your Bluetooth devices might not work properly without the Intel driver.

I have actually deleted the BT driver that comes with the computer and let Windows install generic drivers. That makes BT stuff connectable, but since BT completely disappears after the laptop awakens from sleep, it's quite useless. Or maybe I should learn to switch off laptop every night since I use an SSD...

It has probably been answered elsewhere, but since we're on the topic of crappy bluetooth support on this laptop, has anyone tried swapping the default Wifi module for the Intel 7260 with BT? Does it solve any problems? I'm planning to put the 7260 into my laptop (mainly for ac), and although I don't care much for BT, it would be nice if it actually worked.

Factory image sucks, just my 2 cents. Fresh install with clean image + drivers from support.lenovo.com and third party vendors = success! Everything will be fine as long as you know what you are doing.

Yes, I know factory image isn't as good as fresh install. The problem is I don't have any medium right now to fresh install Windows. The disks I have don't seem to work and I couldn't be bothered looking up a torrent. Lenovo doesn't have much bloatware anyway, and I have uninstalled everything I don't want. But the reinstall of Windows 8.1 had nothing to do with factory image, and my point was that Windows 8.1 update didn't like the second GPU's new VBIOS.

This is gonna sound a bit noobish, but should we flash the vbios from Windows 8 or 8.1...? I'm just curious if it matters or if I'm just being overly concerned a out how to go a about this.

I recently restored my Y500 to factory image and tried to install Windows 8.1. The update kept failing over and over again (with error 0x80004005, apparently something to do with drivers), until I removed the second GPU from the ultrabay. So that might be something to take into consideration!

Will the Y500 mobo support a 55 W CPU? What about heat? The cooling design in this laptop is subpar. The i7-3630QM it's already overheating as it is.

Subpar? Imho, the Y500 has one of the best cooling designs I have seen in a laptop, not to mention the (well, my) laptop generally stays completely silent in non-demanding tasks, such as browsing and typing. Even when I have the internal GPU overclocked to 1200MHz and the CPU and GPU are under pressure (e.g. in a game), I seldom reach more than 70 degrees C. That's not bad at all!

This is gonna sound a bit noobish, but should we flash the vbios from Windows 8 or 8.1...? I'm just curious if it matters or if I'm just being overly concerned a out how to go a about this.

Since the problem is with SLI in Win8.1, you should flash it within 8.1. But I don't know if it makes any difference if you flash it within 8.0.

Finally offical of lenovo.

Hi All,

Good news!!!

IdeaPad Y400, Y500:

NVIDIA GeForce GT650M Second VGA BIOS Update for Windows 8.1 (64-bit) - IdeaPad Y400, Y500

NVIDIA GeForce GT750M Second VGA BIOS Update for Windows 8.1 (64-bit) - IdeaPad Y400, Y500

IdeaPad Y410p, Y510p:

NVIDIA GeForce GT750M Second VGA BIOS Update for Windows 8.1 (64-bit) - IdeaPad Y410p, Y510p

NVIDIA GeForce GT755M Second VGA BIOS Update for Windows 8.1 (64-bit) - IdeaPad Y410p, Y510p

Attention: Do not power off or restart your computer during the VBIOS flashing process, which will cause serious damage and improper functioning of your computer.

Print this file so that you can refer to it during the installation.

Anything related to the new vbios, please open a new thread for discussion so we can track the discussion easier.

Thank you for your time and support!!

Regards,

Cleo

Thanks!

Great to gear that Lenovo finally has released an official (non-Chinese) VBIOS! I just re-flashed with that one, just in case there are any improvements, though I highly doubt it. But why not.

Thanks to UltimaClaud, I managed to flash both my Y500's BIOS and the VBIOS of my 650m ultrabay! Not sure if there'll be any difference at all when Lenovo outside China releases a VBIOS, but the files UltimaClaud linked work like a charm!

Anyway, got the BIOS and VBIOS files from this entry, and then I had to apply a little of my own experimenting skills, using stuff from various threads and webpages. Below is a copy-paste from another thread on how I did this.

Got it working by downloading the files (BIOS v2.04 and vbios650sli), creating a DOS bootable USB stick using Rufus and downloading the latest NVflash for DOS.

From the latest NVflash zip, I took the files CWSDPMI.exe and NVFLASH.exe and replaced the ones in the unzipped VBIOS folder from Sendspace (otherwise I got a "Cannot be run in DOS mode" while trying to flash), and dumping all the files into the root directory of my DOS ready USB stick.

Restarted > F2 > Boot > Boot Mode: Legacy support > save and exit.

I did have to turn off EEPROM write protection using nvflash --protectoff for the flashing to work. Then I flashed the VBIOS by typing "nvflash -i1 -6 7003A.rom" (i1 indicating the ultrabay card). (more on flashing VBIOS here)

Works like a charm, tried it with some basic overclocking in Metro: Last Light!

Check it out. Latest NVidia drivers and stuff too.

Flash the new vbios in the DOS plz.

Files are uploaded here.

Download multiple files from Sendspace.com - send big files the easy way

Leaked vbios which fixed the SLI issue in Win8.1.

with an official bios update 2.04.

Original thread (chinese only)

¸Õ¸ÕµÃµ½ÁªÏëÌṩµÄwindows8.1 Ë«¿¨sliµÄvbios_y500°É_°Ù¶ÈÌù°É

Please be free to do the BIOS / VBIOS modification.

- - - Updated - - -

UPDATE:

The files are for techinferno only.

Please DO NOT FOWARD the files to any site else.

[per file provider's request from the original theared]

AWESOME STUFF! Thanks a bunch!

Got it working by downloading those files (BIOS v2.04 and vbios650sli), creating a DOS bootable USB stick using Rufus and downloading the latest NVflash for DOS.

From the latest NVflash zip, I took the files CWSDPMI.exe and NVFLASH.exe and replaced the ones in the unzipped VBIOS folder from Sendspace (otherwise I got a "Cannot be run in DOS mode" while trying to flash), and dumping all the files into the root directory of my DOS ready USB stick.

Restarted > F2 > Boot > Boot Mode: Legacy support > save and exit.

I did have to turn off EEPROM write protection using nvflash --protectoff for the flashing to work. Then I flashed the VBIOS by typing "nvflash -i1 -6 7003A.rom" (i1 indicating the ultrabay card). (more on flashing VBIOS here)

Works like a charm, tried it with some basic overclocking in Metro: Last Light!

Hmmm, who to blame.. Lenovo or NVidia? So until either of these or someone else can fix it, nobody has SLI? How lousy.