topic Single Channel performance bug on games? in Graphics

Single Channel performance bug on games?

RCarl6 — Fri, 02 Oct 2015 08:14:50 GMT

I have tested at least two laptop (Asus G751JM and Lenovo Thinkpad Yoga 14) both with dedicated graphics (GTX 860m and GT 840m) and the problem is if the computer is only running in single channel memory mode (1 RAM) the performance (Frames Per Second) on games is poor. In Dota 2 for example even if I turn down all the graphical setting to lowest and put resolution to lowest (like 1366x768) the FPS still drops to 40FPS and for some reason if I enabled VSYNC the FPS gets even worse (it would only max at 50FPS)

I make sure to verify that the game is running on NVIDIA card.

When I make my Asus G751JM run in Dual Channel Memory (2 RAM) the FPS is solid 60 without any dips even at maximum graphical settings.

The problem is my Lenovo Thinkpad Yoga 14 only has 1 RAM slot so it is not possible to run it in Dual Channel Memory.

Is this an Intel driver bug?

Re: Single Channel performance bug on games?

RCarl6 — Fri, 02 Oct 2015 08:28:37 GMT

Category

Questions

Answers (N/A if not applicable)

Description

Provide a detailed description of the issue AND 'does it fail every single time, or only sometimes?' If you can offer a % rate please do.

Performance (frames per second) in games is poor when the computer is only running in single channel memory mode (1 DIMM). If the computer is running single channel memory mode the FPS always hover to mid 40's even if you turn down all the graphical settings and even resolution

Hardware (HW)

Brand and Model of the system.

Tried with Asus G751JM and Lenovo Thinkpad Yoga 14

Hybrid or switchable graphics system? ie Does it have AMD or NV graphics too?

It does have Hybrid Graphics and I tested it with Asus G751JM with GTX 860m and Lenovo Thinkpad Yoga 14 which has GT 840m

Make and model of any Displays that are used to see the issue (see note2 below).

LFP = Local Flat Panel (Laptop panel)

EFP = External Flat Panel (Monitor you plug in)

LFP both are 1920x1080

How much memory [RAM] in the system (see note2 below).

The problem only occurs when the computer is running in single channel memory mode (RAM). As for the capacity I am using 8GB single DIMM sticks

Provide any other hardware needed to replicate the issue.

ie: Cables&brand, cable type [vga, hdmi, DP, etc], dock, dongles/adapters, etc

nothing special

Hardware Stepping (see note1 below).

Software (SW)

Operating System version (see note2 below).

Windows 10

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Re: Single Channel performance bug on games?

Ricardo_G_Intel1 — Mon, 05 Oct 2015 23:17:46 GMT

I checked both models and both uses NVIDIA Graphics only, this does not come switchable graphics, this means the graphics on the processor are disabled

http://shop.lenovo.com/us/en/laptops/thinkpad/yoga-series/yoga-14/ ThinkPad Yoga 14 | 14" 2-in-1 Business Ultrabook | Lenovo US

https://www.asus.com/Notebooks/ASUS_ROG_G751JM/specifications/ ASUS ROG G751JM | Notebooks | ASUS Global

Re: Single Channel performance bug on games?

RCarl6 — Mon, 05 Oct 2015 23:25:34 GMT

That is not true. Both the Lenovo Thinkpad Yoga 14 and Asus G751JM has NVIDIA Optimus (Intel Graphics Enabled).

http://www.notebookcheck.net/Lenovo-ThinkPad-Yoga-14-Convertible-Review.133661.0.html Lenovo ThinkPad Yoga 14 Convertible Review - NotebookCheck.net Reviews

http://www.bestbuy.com/site/asus-17-3-laptop-intel-core-i7-8gb-memory-1tb-hard-drive-black/8618959.p?id=1219357515825 Asus 17.3" Laptop Intel Core i7 8GB Memory 1TB Hard Drive Black G751JM-BHI7N27 - Best Buy

Re: Single Channel performance bug on games?

Ricardo_G_Intel1 — Tue, 06 Oct 2015 16:54:09 GMT

The same information I am reading from the link you added

http://www.notebookcheck.net/Lenovo-ThinkPad-Yoga-14-Convertible-Review.133661.0.html Lenovo ThinkPad Yoga 14 Convertible Review - NotebookCheck.net Reviews

"There is only one configuration available as of this writing and this includes a Core i5-4210U CPU, 1080p IPS display, http://www.notebookcheck.net/NVIDIA-GeForce-840M.105681.0.html GeForce GT 840M GPU" please click the Ge Force GT 840M link.http://www.notebookcheck.net/NVIDIA-GeForce-840M.105681.0.html NVIDIA GeForce 840M - NotebookCheck.net Tech This means the OEM disabled the Intel® graphics.

This information is from the link you added, please click on specifications

Asus - 17.3" Laptop - Intel Core i7 - 8GB Memory - 1TB Hard Drive - Black

Graphics Type: Discrete

Graphics Processing Unit/GPU: NVIDIA

Re: Single Channel performance bug on games?

Bryce__Intel — Tue, 06 Oct 2015 17:05:26 GMT

I'd have to agree with Ricardo on this one. Article and you note above "with dedicated GeForce graphics" which means Intel graphics is out of the picture at the least on the Yoga. Since it's failing on both I'd lean toward a 3rd party issue.

Re: Single Channel performance bug on games?

RCarl6 — Tue, 06 Oct 2015 17:15:24 GMT

I don't know why you all think it doesn't have intel graphics enabled when it clearly says NVIDIA Optimus.

btw I am currently using the Lenovo Thinkpad Yoga 14

Re: Single Channel performance bug on games?

RCarl6 — Tue, 06 Oct 2015 17:20:26 GMT

Directly from Lenovo Driver page for Lenovo Thinkpad Yoga 14

Re: Single Channel performance bug on games?

gbhj — Tue, 06 Oct 2015 19:39:28 GMT

inside the nvidia control panel have you set the game to use the nvidia GPU

http://forums.laptopvideo2go.com/topic/26992-optimus-test-tools-finally-in-users-hands/ Optimus test tools finally in users hands - News - LaptopVideo2Go

multi port memory does work with nvidia gpu (e.g CPU and nvidia GPU can both use DMA at the same time however Intel GPU shares the CPU data bus causing problems )

older Intel GPU had option to set priority when CPU and GPU wanted to read memory

Re: Single Channel performance bug on games?

RCarl6 — Tue, 06 Oct 2015 20:02:49 GMT

I don't think you understand what this thread is for.

Read the original post and it answers the stuff you mentioned

Re: Single Channel performance bug on games?

Cesar_B_Intel — Mon, 23 Nov 2015 09:45:53 GMT

Helloxtinct16.

Could you please post the http://www.intel.com/support/graphics/sb/cs-009476.htm Graphics Drivers — Intel® Graphics Driver Report here so we could do further investigation on this particular situation?

Regards,

Caesar B_Intel.