Thread: nForce 8400GS @ 512 MB DDR3 Compatibility Issue on G41-ICH7 Mobo - Lion 10.7.2

Hello guys, please help me to solve this problem:

I have PCI-e VGA with ZOTAC nVIDIA GeForce 8400GS @ 512 MB DDR3 64-bit.

I've using it on my Acer ASPIRE M1800 PC (nForce 630i Chipset with DualCore CPU E5200 @ 2.5 GHz, 2 GB RAM DDR2, 2 x 320 GB SATA HDD, DVD-R/W Dual Layer) and everything work fine with iATKOS L2 (Mac OSX Lion 10.7.2 - Upgraded to 10.7.3). With just adding my Device ID to NVDANV50Hal.kext on S/L/E and boot with "arch=i386 Graphics Enabler=Yes" ... all accellerations and resolutions work OOB fully Q/E & CI.

But now, I found some problems when using it on my new PC with this specs:

Vendor : Lenovo H310 Desktop PC
Chipset : Intel G41 - 82801G SounthBridge [ECS MoBo]
Processor : Intel DualCore CPU E6700 @ 3.2 GHz
VGA : OnBoard Intel G41 (detected as unknown 64 MB on Snow Leo 10.6.2 & Lion 10.7.2)
HDD : Western Digital @ 500 GB, SATA-7200 RPM
Memory : Samsung 2 GB DDR3 Single RAM
Others : Lenovo 18" LCD Monitor, DVD-R/W, Realtek OnBoard Ethernet, Card Reader, PS/2 Keyboard & USB Mouse.
Misc : No AHCI Mode on BIOS (but just IDE), VT Tech, Video Mode Switch (between Onboard & PCI-e)

The installation succeeded; iATKOS L2 DVD using the OnBoard VGA.
Some problems occur when I decided to replace the OnBoard VGA with my 8400GS PCI-e. All accelerations & resolutions work fine with fully Q/E & C/I (just a same as above method), but wait... now i get very slow OS Performance and unfortunately my PS/2 Mouse & USB Keyboard couldn't run perfectly (jittery, acceleration problem, I couldn't move it on). Then, I try to replace the USB Mouse with PS/2 Port, using other mouse / keyboard but it doesn't work anymore. When using OnBoard VGA (1024x768 Native Resolution; X4500.kext compatibility issue, no Q/E & C/I) it works perfectly (Both PS/2 Keyboard & USB Mouse).

So, I assume that 8400GS VGA caused this problem.
(Additional: When booting with "-v" option, I got some outputs that ALPSGlidePoint, VoodooPS2SynapticsTouchPad, and ApplePS2Trackpad are loaded. I don't know what this mean, since I'm sure that my PC doesn't have this hardware. I've tried to remove it from S/L/E, but I found nothing there...!?)

Please, help me to fix this problem... Thanks very much, and I apologize for my bad English.

Add: It's Lenovo L-IG41C1 Motherboard...

I don't see problem with AGPM, you card is new DDR3, try use EFI and put in device propertise at Boot.plist you can try mine:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Kernel Flags</key>
<string>npci=0x2000 USBBusFix=yes GraphicsEnabler=yes EthernetBuiltIn=yes</string>
<key>device-properties</key>
<string>6c0200000100000001000000600200000d000000 02 010c00d041030a000000000101060000010101060000007fff 04001e00000072006f006d002d007200650076006900730069 006f006e0000002e0000006e5669646961204765466f726365 2038343030204753204f70656e474c20456e67696e65205b45 46495d22000000400030002c00640065007600690063006500 5f00740079007000650000000b000000646973706c61791000 00004e00560043004100500000001800000004000000000003 000c00000000000007000000000e0000006e0061006d006500 00000b000000646973706c617914000000400030002c006e00 61006d0065000000120000004e5644412c446973706c61792d 41100000006d006f00640065006c0000001a0000006e566964 6961204765466f72636520383430302047530e0000004e0056 0050004d000000200000000100000000000000000000000000 000000000000000000000000000014000000400031002c006e 0061006d0065000000120000004e5644412c446973706c6179 2d4220000000400031002c0063006f006d0070006100740069 0062006c00650000000e0000004e5644412c4e564d61632200 00005600520041004d002c0074006f00740061006c00730069 007a0065000000080000000000002020000000400030002c00 63006f006d00700061007400690062006c00650000000e0000 004e5644412c4e564d616322000000400031002c0064006500 76006900630065005f00740079007000650000000b00000064 6973706c61791c0000006400650076006900630065005f0074 0079007000650000000f0000004e5644412c506172656e74</string>
</dict>
</plist>

BTW, with same VGA but other CPU Chipset, it run perfectly with no problem (on my nForce 630i for example).

Some problems occur on my Lenovo G41 Mobo. I've using a lot of methods from many forums to fix this problem; modify xxx.kext, EFI String, Natit, but nothing work.

But, someone on another forum say that:
"...if you're experiencing slow performance with any nVidia card (namely the Quadro and Fermi platforms) just disable/remove the AppleGraphicsPowerManagement kext in /S/L/E/ and you'll see that you'll write to disk less (??? I have no idea why) and you'll also have a bunch more free RAM."

What do you think about this, should I remove my AGPM to the trash...!? Thanks and regard...

I have remove and there slight improvement, the problem is you will face for any other program, like if you run DRAGON AGE II, you cannot get good control for mouse and 3D views...

I don't see big problem as I use same card with you on my FOXCONN Mobo, use EFI and modified and "50Hall" thing to add you card ID's...

Use usb keyboard and mouse, delete all ps2 trackpad kexts, it should resolve your keyboard and mouse problem.

for vga dont use any kext, just use graphic enable command in boot plist file. or to fix that use multibeast 4.2.1 for lion (google it)

I've use both of "USB Keyboard & Mouse", remove all PS/2 TrackPADs, use any boot flags... but same results. Maybe, my "VGA Card" doesn't support this G41 Mobo. Thanks for u'r reply.

try these kexts

http://www.osx86.net/view/2400-8400g...on_10.7.3.html