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orenboren
Paper Tape
Posts: 3
Registered: ‎09-25-2014
Location: Israel
Views: 927
Message 1 of 7

Y510P - PCI Express speed only x8

Hi,

 

I noticed that the PCI express link speed is at X8, while it is supposed to be X16.

 

Is this because of the m.2 ssd connected?

 

I have tried to change the settings in Windows power settings, tried making the computer turn on the X16 with a stress test with GPU-Z, but still at x8

 

What next?

 

Thank you!

 

 

Y510P - Single Nvidia GT 750m - 20GB m.2 SSD - Windows 8.1

Psyrecx
802.11n
Posts: 233
Registered: ‎02-21-2013
Location: Ohio
Views: 901
Message 2 of 7

Re: Y510P - PCI Express speed only x8

No, it's due to the limits of the mobile chipset and SLI. If it ran at 16x you wouldn't have the ability to use a second GPU.

___________________________________________________________________________________________________________________
Lenovo Ideapad Y500 | Intel® Core™ I7-3630M @2.4GHz | 8GB 1600MHz DDR3 RAM | Nvidia® Geforce™ GT 750M | 120GB Mushkin Atlas Deluxe mSATA SSD | 1TB Samsung Spinpoint M8 5400RPM HDD | 1080p Lenovo Display | Intel® Dual Band Wireless-AC 7260
unclewebb
802.11n
Posts: 236
Registered: ‎05-08-2010
Location: Cochrane
Views: 878
Message 3 of 7

Re: Y510P - PCI Express speed only x8

I have a Y510P with a single GT 755M and same thing. It only runs at x8. Every similar laptop from every other manufacturer runs at x16. It probably doesn't make a huge difference to performance but it is annoying when you read the reviews and nothing is mentioned about this.
Psyrecx
802.11n
Posts: 233
Registered: ‎02-21-2013
Location: Ohio
Views: 869
Message 4 of 7

Re: Y510P - PCI Express speed only x8

Yes, it's that way so that you CAN use SLI even if you're only using a single GPU currently.
___________________________________________________________________________________________________________________
Lenovo Ideapad Y500 | Intel® Core™ I7-3630M @2.4GHz | 8GB 1600MHz DDR3 RAM | Nvidia® Geforce™ GT 750M | 120GB Mushkin Atlas Deluxe mSATA SSD | 1TB Samsung Spinpoint M8 5400RPM HDD | 1080p Lenovo Display | Intel® Dual Band Wireless-AC 7260
orenboren
Paper Tape
Posts: 3
Registered: ‎09-25-2014
Location: Israel
Views: 861
Message 5 of 7

Re: Y510P - PCI Express speed only x8

So this means there is no PCIe X16 connector in this computer, only 2 X8 connectors.

 

This is a bit annoying - Ususally, when you don't actually connect two cards in SLI, the bus is free to use it's full speed...

 

 

So, who do I turn to for a BIOS fix? Smiley Tongue

 

Or is it impossible due to the physical connector being a max X8? <not an acceptable answer!

 

 

I know, maybe the X8 doesn't even cause a bottle neck, but I can't actually test that, can I...

unclewebb
802.11n
Posts: 236
Registered: ‎05-08-2010
Location: Cochrane
Views: 859
Message 6 of 7

Re: Y510P - PCI Express speed only x8

The difference in performance between x8 and x16 is approximately 2%.  

 

http://forums.anandtech.com/showthread.php?t=2200539

 

With the Y510P, you should worry more about the Lenovo feature that disables Intel Turbo Boost while gaming.  A Core i7-4700MQ can run up to 50% faster when Turbo Boost is properly enabled.  

orenboren
Paper Tape
Posts: 3
Registered: ‎09-25-2014
Location: Israel
Views: 855
Message 7 of 7

Re: Y510P - PCI Express speed only x8

Yes, I figured the difference wouldn't be noticeable, but it still bugs me.

 

And no, I didn't know about the Turbo-Boost block... I could have got two core I3 laptops for the price on one castrated Y510P...

 

 

No nice Lenovo... I still love this computer, but a bit dissapointed... Also the TN panel... But still love my Y510P... Well, LIKE it... To a point...

 

Meh.

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