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i have an acer aspire 5920. i was looking over the INF from the official manufacturers driver(156.72), and found a setting for my device that i can not find any info on. i pulled out all information pertaining to my card from this INF here:

%NVIDIA% = NVIDIA.Mfg,NTx86.6.0

%NVIDIA_G84.DEV_0407.1%  = nv_G8x,       

PCI\VEN_10DE&DEV_0407&SUBSYS_01211025//this is my card
%NVIDIA_G84.DEV_0407.2%  = nv_G8x,       

%NVIDIA_G84.DEV_0407.3%  = nv_G8x,
%NVIDIA_G84.DEV_0407.4%  = nv_G8x,       

%NVIDIA_G84.DEV_0407.5%  = nv_G8x,       

%NVIDIA_G84.DEV_0407.6%  = nv_G8x,       

%NVIDIA_G84.DEV_0407.7%  = nv_G8x,       

%NVIDIA_G84.DEV_0407.8%  = nv_G8x,    

Include      = msdv.inf
FeatureScore = F6
CopyFiles    = nv.KMode, nv.UMode, nv.OpenGL, nv.Panel, 

nv.Help, nv.Uninstall, nv.PanelClient
AddReg       = nv_SoftwareDeviceSettings
AddReg       = PerfLevelSrc_AddReg
AddReg       = nv_icdSoftwareSettings
AddReg       = G8x_UncachedHeapSize  //this is not in any other INF i could find
AddReg       = nv_ControlPanelSettings
AddReg       = PerfLevelSrc_AddReg
AddReg       = RMDisablePteCoalesce_AddReg
AddReg       = Uninstall_AddReg
AddReg       = EvictionThreshold_AddReg
DelReg       = nv_ClearRegistrySwitches
RegisterDlls = nv.RegisterDlls

CopyFiles = nv.CoInstaller
AddReg    = nv_CoInstaller_AddReg

AddService = nvlddmkm, 0x00000002, nv_Service_Inst
//AddService = nvsvc,, nv_Service_Inst_2*  added from 174.74

MaximumDeviceMemoryConfiguration = 128
MaximumNumberOfDevices           = 4

[G8x_UncachedHeapSize] //?
HKR,, UncachedHeapSize, %REG_DWORD%, 0x20000000

; Non-Localizable Strings
REG_SZ         = 0x00000000
REG_MULTI_SZ   = 0x00010000
REG_EXPAND_SZ  = 0x00020000
REG_BINARY     = 0x00000001
REG_DWORD      = 0x00010001
REG_SZ_APPEND  = 0x00010008
; Localizable Strings
NVIDIA_G84.DEV_0407.1  = "NVIDIA GeForce 8600M GT"//my card
NVIDIA_G84.DEV_0407.2  = "NVIDIA GeForce 8600M GT "
NVIDIA_G84.DEV_0407.3  = "NVIDIA GeForce 8600M GT  "
NVIDIA_G84.DEV_0407.4  = "NVIDIA GeForce 8600M GT   "
NVIDIA_G84.DEV_0407.5  = "NVIDIA GeForce 8600M GT    "
NVIDIA_G84.DEV_0407.6  = "NVIDIA GeForce 8600M GT     "
NVIDIA_G84.DEV_0407.7  = "NVIDIA GeForce 8600M GT      "
NVIDIA_G84.DEV_0407.8  = "NVIDIA GeForce 8600M GT       "

does anyone know what exactly setting the uncached heap size does? why its not in any other INFs? should i include it in INFs for newer driver versions? any help would be appreciated

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sorry should have been more clear. that codebox contains a text file a made pulling out all info directly relating to my card. here are the specific sections i have questions about

AddReg       = G8x_UncachedHeapSize

HKR,, UncachedHeapSize, %REG_DWORD%, 0x20000000

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