Trying to use Onboard Video with R9-290

[low_psi]

Quick breakdown of the PC:

Intel i5 4690k (clocked at 4.5 Ghz)
Corsair H60 Cooler
Gigabyte Z97X Gaming7
G Skill Sniper 2 x 4GB 1833 DDR3
EVGA SuperNova 850 watt
XFX R9-290 Black Edition
3 Samsung S24D590pl Monitors
1 Samsung SyncMaster 205BW

On to the issue....

I am using the 3 Samsung 24" panels plugged into the R9-290 (2 via DVI & 1 HDMI). They work great! I use this setup as a racing simulator running iRacing. I have added a fourth monitor to be used for timing and telemetry. It appears I need an Active DP to DVI adapter in order to use the 4th monitor via the R9-290 card. I tried a passive DP to DVI and it wouldn't allow me to extend the desktop to the 4th monitor. So until I can order the Active DP adapter I figured I would enable the onboard video and use that for the 4th monitor. The problem here is it seems to be sharing the r9-290 GPU memory and not the 64MB I allocated in the BIOS. If I remove the R9-290 from the computer and boot just with the onboard graphics, then go to the properties of the display it shows Total Available Graphics Memory 1696 MB, Dedicated Video Memory 64MB, and Shared System Memory 1632 MB. When I add the R9 290 back to the PC, both the R9 and the onboard show the same memory details... Ultimately this is leading to choppy behavior while running iRacing. Is there a way to stop the onboard video from sharing or using the R9s resources??

 

[photonboy]

Hi,

Your iGPU can't use any of the video memory on your R9-290.

The "Total" graphics memory includes System Memory (i.e. DDR3) to be used as a temporary buffer so the DDR3 used is the "Shared" portion and it's not used unless the program needs it. In the case of the iGPU this is the same physical DDR3 memory.

Aside from ensuring the gaming monitor is attached to the R9-290, I'm at a loss to explain your performance issues since I've used an iGPU just fine.

There's obviously something wrong. It's also interesting to note the INTEL GPU is shown for the 2nd crop but with 4GB of dedicated memory that should be the R9-290... WTF?

Update:
I suppose you could see if any BIOS settings are applicable. Probably not. You can also try updating the Intel drivers direct from Intel's site (let it scan your system).

 

[low_psi]

I added a pic of the r9 details, it shows the same as the Intel. This is what has me confused. There is a noticeable performance increase when I disable the onboard video card in the BIOS. All the stuttering disappears in iracing. As soon as I enable the onboard video again (with our without the telemetry on the 4th monitor (using the onboard video) it begins to stutter again. There fps stays the same.. But iRacing also reports a fault when the onboard is active (in their built in fps counter/display). SO there is a conflict for sure. Just need to figure it out and how to fix (other than the obvious, disable the onboard video)...

 

[low_psi]

The Intel drivers are new as of yesterday. Up until yesterday, I had the onboard disabled and had never installed the drivers. Only enable after I added the fourth monitor..