Jump to content
EwinRacing Flash Series Gaming Chairs

Y510p 750m issues detecting SLI ultrabay card (PSA)

Recommended Posts

I am the guy on the lenovo forums that started the long threat about the ultrabay 750m5 cards not working on Y510p laptops (when bought separately). The problem is that if you bought non-sli version of the y510p 750m and then bought the ultrabay 750m5 card it is not being detected by the laptop. The problem has been figured out and basically Lenovo neutered the non-sli versions so they can't provided enough power to the ultrabay to support the second card so you are out of luck. You might be able to return the card or send back the entire laptop for a motherboard change. I did the later and they put the same motherboard back in so it didn't work for me. Eventually I returned the entire laptop for a new one directly from Lenovo with the SLI from factory and it works now.

Share this post

Link to post
Share on other sites

Yeah I was afraid of this issue when I was purchasing my laptop. I had difficulty finding a 755M ultrabay (actually...I didn't), so I handed my wallet's soul over. But good to know Lenovo is serious about not supporting upgrades. Even if they're the ones advertising, selling, and profiting from the upgraded parts! I love my y510p dual graphics laptop, HATE HATE HATE HATE Lenovo with a passion. They give ZERO support when it comes to upgrades. They won't even admit that parts their manuals say are compatible with their laptops exist. I spent an hour trying to find out who on this planet sells the Liteon AC wireless cards, sent several e-mails to distributors and manufacturers...but to not avail.

Share this post

Link to post
Share on other sites

Nope, I have both the 120w and the 170w adapter and neither fixed the issue. I got a new laptop from Lenovo that works but they are tinkering with my old one and it sounds like the cards they are selling are not compatible because other people have taken cards from factory SLI models and they work fine in our single card models. Lenovo is working with me on this trying to figure it out and I will update when I know more.

Share this post

Link to post
Share on other sites

BIG NEWS! Looks like Lenovo is working on the problem still and posted the following in my thread over on the Lenovo Support Forums:


We've been quiet on this for a while even though it is being worked at several levels.

I think we believe there may be different versions of the card in circulation, with the principle difference being the vbios on the card. We are working on a solution for the field, and I am hopeful it will be a simple vbios update.

Ordinarily I wait until we are certain of the solution and have a timetable for it, but I know this has been a long running issue and I wanted to share that we are finally making progress.

Best regards,


Share this post

Link to post
Share on other sites

GT750M, and GT755M Ultrabays all use the SAME EXACT PCB, and likely the same components too. There is literally no difference between the two except for the hardware straps (for configuring Device ID) and the vBIOS. Both of which can be easily changed. I modified them on a GT755M and "downgraded" it into a GT750M and am running native SLI in my August 2013 y410p GT750M.

I'm running a large Alienware PSU so I have plenty of power. The motherboard handles the power just fine. It's not an issue with the motherboards, it's an issue with the Ultrabay manufacturing. Most likely the vBIOS as the Lenovo mod pointed out.

Share this post

Link to post
Share on other sites

If you have a non-working card you can send in the card and your laptop and they can now fix the problem but as far as I know they never sold working version and it is now discontinued.

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Content

    • By Donz7733
      I am planning to get this Charger (170w 20v 8.5a) - https://www.amazon.in/Lenovo-ThinkPad-4X20E50574-170W-AC/dp/B00MLTQ99Y
      the Adapter - https://www.aliexpress.com/item/32975526334.html?spm=a2g0o.productlist.0.0.27cb747e6TEc28&algo_pvid=a7db42d0-97cb-4a37-be7a-d19c44bddf73&algo_expid=a7db42d0-97cb-4a37-be7a-d19c44bddf73-0&btsid=8d6ee0f9-08e9-4474-b63b-cc751403b4c7&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_60
      Will this combination work to run Both GT755m of Y510p?
    • By can rx
      Hello to all dear visitors, 
      I have been using Lenovo y510p notebook for two years but in games I think my graphic card is inadequate. After that I've bought Mini PCI-e EXP GDC and attached it to where the wireless card socket is.  However because it has x1 speed its performance is too low. Even though on tests rx460's ranks is low than rx480, it has more performance.
      In x1 PCI-e port, the performance is too low and inefficient. On GPUz programme, use of memory controller is 20% but use of GPU is 100%. I mean, I've been hooked to the x1 speed.
      Components : EXP GDC version 8.0 +450w PSU + rx480
      I've read all pages about ultrabay, I want to buy and to share in forum.
      If anyone has ultrabay to PCI-e port, I want to buy. Please help.
      Thanks for everything.
    • By High_Voltage
      In case you own a Lenovo Y410p or Y510p laptop, you might be interested in upgrading its performance by installing an external graphics card. Ultrabay eGPU adapter designed by @gerald was proven to be a convenient plug-and-play option to do exactly that. However, for a long time only an AMD-branded GPUs could be used due to limitations in the Lenovo's stock BIOS. The purpose of the modified firmware presented here is to expand the range of available GPUs by enabling Nvidia support on Gerald's Ultrabay eGPU adapter.
      Huge thanks to:
      @MWichni - For efficiently assisting me during the development of this mod. By flashing dozens of BIOS builds over the course of several weeks and thoroughly describing the effects observed (or the lack thereof), he enabled me to fully understand necessary parts in BIOS structure and come up with a final solution. @svl7 - Whose unlocked BIOS / Whitelist mod has served as a basis for this modification. His discovery of a security hole in V2.07 BIOS has provided us with a convenient BIOS flashing method that does not require a physical programmer. The Unlocked BIOS and WLAN whitelist mods originally designed by him are also implemented in this BIOS mod. @gerald - For designing the aforementioned adapter. Without it, all this work would make very little sense.  
      Key features:
      Resolves the "40-second reboot" issue normally encountered while using Nvidia graphics cards with Ultrabay eGPU adapter, thus allowing all Nvidia cards to be used. Based on the latest V3.08 BIOS. Includes Svl7's WLAN whitelist removal mod - for the convenience of aftermarket WLAN card users. Includes Svl7's BIOS debug menu mod - for the ease of experimentation with newly available features, e.g. attempting to use Nvidia Optimus to pass eGPU video back to laptop's display.  
      NB! Svl7's Debug Menu is not a toy! It contains a lot of options that are either not supported or partially supported by the hardware platform and/or can disturb its normal operation or prevent the PC from booting up at all. Any of the entries not originally present in the stock BIOS should be modified at your own risk!
      Installation instructions:
      If things don't go right:
      Error 43:
      If you intend using the GTX10XX-series Nvidia card as the eGPU (which you probably do), you are very likely to encounter the infamous Error 43 in Windows Device Manager. This is a widely known issue in the eGPU community and is not related to this particular mod in any way. Following this guide thoroughly will in most cases resolve the Error 43 issue.
      Get your copy here!
      Version of this mod for Lenovo Y400/Y500 models is coming soon!
    • By mocji117
      Hi, I got a Sager NP8278 (Clevo P170SM) with a gtx970m 6GB. is there a way to have SLI or what are my upgrade options for the video card?
    • By Doki
      Clevo X7200 for sale! good condition.
      with Windows 7
      config: price 590 USD
      CPU i7 960
      12GB RAM
      128GB SSD
      GTX 470M
      Barebone (cpu only) 460 USD
      without CPU 420USD
      ask for details
  • Create New...

Important Information

By using this site, you agree to our Terms of Use. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.