Increase vram - hd 3000

kylon · January 7, 2017

Hi,

I m having a few glitches on sierra 10.12.2 and i would like to increase the vram to 1gb to see if this can help my intel hd.

I m looking for the hex string to replace or a way to find it by myself.

I can only find the hex string for yosemite and mavericks but it s changed.

Also, if you know a bios option that do this, please let me know.

Thanks

EDIT:

VRAM Patches

MacOs 10.13x [Hervé]

MacOS 10.6x-10.13x [sherlocks]

PMheart · January 8, 2017

Hi.

I think bin-patch AppleIntelSNBGraphicsFB may not take changes... But anyway here is the bin-patch data I found based on the previous patches. (Yes. I saw the data has been changed.)

For the current vram == 384MB, you can try this:

Kext: AppleIntelSNBGraphicsFB
Find: C7 45 C4 00 00 00 18
Repl: C7 45 C4 00 00 00 40

For the current vram == 512MB, try this one:

Kext: AppleIntelSNBGraphicsFB
Find: C7 45 C4 00 00 00 20
Repl: C7 45 C4 00 00 00 40

Note: Have a look on the last data and you can get something.

Edit: Here is a simple form for the vram size. (10.12+)

C7 45 C4 00 00 00 80  //2048MB
C7 45 C4 00 00 00 40  //1024MB
C7 45 C4 00 00 00 30  //768MB
C7 45 C4 00 00 00 20  //512MB
C7 45 C4 00 00 00 18  //384MB 
C7 45 C4 00 00 00 10  //256MB
C7 45 C4 00 00 00 08  //128MB
C7 45 C4 00 00 00 04  //64MB
C7 45 C4 00 00 00 02  //32MB
C7 45 C4 00 00 00 01  //16MB

I don't know whether this can help...

BTW this can be increased in BIOS and it's a menu about DVMT. But in some cases this could be invisible and thus you may need to patch BIOS. This could be a catastrophic for laptop users...

PMheart · January 8, 2017

It's very unlikely to have BIOS options to do this on a laptop and, with OS X, it's directly linked to the amount of RAM fitted to the computer. To allocate more RAM than done as standard, you have to implement the kext patch.

I did it before in Yosemite and EC and it worked; can't remember trying it out in Sierra...

http://forums.macrumors.com/threads/how-to-increase-vram-for-hd3000-graphics.1766384/

Oops. The data has been changed. It's C4 instead of BC now...

PippoX0 · January 8, 2017

Hi Hervé,

Fine tutorial !

I have injected max VRam in DSDT , and that method works too.

Best regards

PippoX0

Sent from  iPhone/iPad

kylon · January 8, 2017

I unlocked my bios and i upgraded to 16gb.

From what i read, the vram size changes when you increase the ram. Max size should be 1gb (16gb), >1gb should cause more glitches and crashes, but there s a softlock in os x for a size >512 so you need to patch the kext.

About bios options(i m a noob here)

Aperture size: can be increased from 256 to 512

DVMT Pre-Allocated: i have values from 32mb to 512mb.

Current value is 64mb.

DVMT Total Gfx Men: Current value is 256. It can be changed to Max.

I will try to patch the snb kext and report back.

@pippox0

Check opengl driver monitor.

Dsdt patch could be aesthetic only.

Thanks

PMheart · January 8, 2017

I unlocked my bios and i upgraded to 16gb.

From what i read, the vram size changes when you increase the ram. Max size should be 1gb (16gb), >1gb should cause more glitches and crashes, but there s a softlock in os x for a size >512 so you need to patch the kext.

About bios options(i m a noob here)

Aperture size: can be increased from 256 to 512

DVMT Pre-Allocated: i have values from 32mb to 512mb.

Current value is 64mb.

DVMT Total Gfx Men: Current value is 256. It can be changed to Max.

I will try to patch the snb kext and report back.

@pippox0

Check opengl driver monitor.

Dsdt patch could be aesthetic only.

Thanks

I just found 'C7 45 C4 00 00 00 18' (384MB) and 'C7 45 C4 00 00 00 20' (512MB) in the vanilla AppleIntelSNBGraphicsFB.

This could be used on real Macs which is with HD3000 integrated graphics. For 4GB it's 384 and for 8GB it's 512. (This is MacBookPro 2011 used if my mind didn't get messed...)

Also agree with @Hervé, I don't think editing DSDT will make any sense.

Once again. Patching AppleIntelSNBGraphicsFB could be cosmetic as well...

I think you should increase DVMT in BIOS. But it seems that 64 is enough. Try 96 please. Also try setting DVMT Total Gfx Men to max.

If above made no sense and then try to patch AppleIntelSNBGraphicsFB...

kylon · January 8, 2017

Current size is 512.

Patched appleintelsnbgraphics for 1gb. (40)

Added vramsize:1024 to info.plist in appleintelhd3000graphics.

Vram is now 4mb :/

Am i doing something wrong?

PMheart · January 8, 2017

Current size is 512.

Patched appleintelsnbgraphics for 1gb. (40)

Added vramsize:1024 to info.plist in appleintelhd3000graphics.

Vram is now 4mb :/

Am i doing something wrong?

Sorry. I didn't get anything about vramsize in the Info.plist of AppleIntelHD3000Graphics.kext?

kylon · January 8, 2017

@PMheart

I just changed my bios settings.

96 and max.

Seems that glitches are gone.

Need more testing!

Anyway i still want to increase vram to 1gb.

Thanks

Edit:

You have to add a new key VRAMSize and set 1024.

PMheart · January 8, 2017

@PMheart

I just changed my bios settings.

96 and max.

Seems that glitches are gone.

Need more testing!

Anyway i still want to increase vram to 1gb.

Thanks

Edit:

You have to add a new key VRAMSize and set 1024.

So now what's your current vram?

kylon · January 8, 2017

512mb

Vram size is not changed.

The only changes are:

No glitches (as of now)

Little performance boost

Thanks

PMheart · January 8, 2017

512mb

Vram size is not changed.

The only changes are:

No glitches (as of now)

Little performance boost

Thanks

Keep trying to increase DVMT... May help.

kylon · January 8, 2017

Mmmh

Linux and windows refuse to boot now.

Still 96 and max

PMheart · January 8, 2017

Mmmh

Linux and windows refuse to boot now.

Still 96 and max

Oops. Feel sorry to hear that... In this case you have to decrease DVMT that keeps all systems can be started up.

maurus2705 · January 8, 2017

I had artifacts with 4GB of RAM, now with 8gb no more artifacts

kylon · January 8, 2017

Back to pre allocated 64mb

Gfx mem still to max

They boot again.

Gfx mem to max seems enough to stop glitches.

Vram size is 4mb when i patch the kext.

I don t understand what s wrong with my kext.

Is Vramsize not numeric?

Thanks

kylon · January 8, 2017

I have 16gb of ram.

Ah, that s my error, i looked for 00 18, not 00 20.

I ll try again now

Thanks

kylon · January 8, 2017

patched successfully this time, thanks @Hervé

"About this mac" says 512mb but, if we can trust openGL monitor, my max is now 1Gb and in this gpu test i m using 800mb of vram.

hd3000 + snbgraphics patch

kylon · November 2, 2017

Thank you

Sherlocks · November 3, 2017

thank you for great info.

i will research 10.6~10.10 binary patch and will post again.

maybe this patch help graphic glitch issue.

legot28 · November 3, 2017

hello

for me , the only solution for graphic glitch is a modified edid injection via dsdt

Sherlocks · November 3, 2017

hello

for me , the only solution for graphic glitch is a modified edid injection via dsdt

what is your modified edid?

Sherlocks · November 3, 2017

i finished vram patch cleanup for each os.

================10.6.x=======================

==4gb user==