Quite a bit - native power management for one. Your GA-X58A-UD3R is the little brother of the -UD7 I have and should work just fine with the patched DSDT from the forum database.
The only problem I can forsee for you in ML is the 9800GT. That card was a PITA in Lion and may no longer be supported in ML. Google is your friend there.
Yep, you are right; all worked well until 10.7.2. Anyway, it seems to be chugging along now. So I managed to plug the DSDT in. My kexts are listed below and altho I don't know how to read the numbers after each entry I reckon this is working fine, CPU management is listed etc: does it look good for you/anything obvious missing? Thanks for your help, its really appreciated!
Index Refs Address Size Wired Name (Version) <Linked Against>
1 63 0xffffff7f80756000 0x686c 0x686c com.apple.kpi.bsd (12.2.0)
2 6 0xffffff7f80741000 0x46c 0x46c com.apple.kpi.dsep (12.2.0)
3 87 0xffffff7f80760000 0x1b7ec 0x1b7ec com.apple.kpi.iokit (12.2.0)
4 91 0xffffff7f8074c000 0x99f8 0x99f8 com.apple.kpi.libkern (12.2.0)
5 75 0xffffff7f80742000 0x88c 0x88c com.apple.kpi.mach (12.2.0)
6 34 0xffffff7f80743000 0x500c 0x500c com.apple.kpi.private (12.2.0)
7 48 0xffffff7f80749000 0x23cc 0x23cc com.apple.kpi.unsupported (12.2.0)
8 0 0xffffff7f81f08000 0x41000 0x41000 com.apple.kec.corecrypto (1.0) <7 6 5 4 3 1>
9 15 0xffffff7f819f2000 0x9000 0x9000 com.apple.iokit.IOACPIFamily (1.4) <7 6 4 3>
10 24 0xffffff7f80850000 0x29000 0x29000 com.apple.iokit.IOPCIFamily (2.7.2) <7 6 5 4 3>
11 1 0xffffff7f826d8000 0x5d000 0x5d000 com.apple.driver.AppleACPIPlatform (1.6) <10 9 7 6 5 4 3 1>
12 1 0xffffff7f81762000 0xe000 0xe000 com.apple.driver.AppleKeyStore (28.21) <7 6 5 4 3 1>
13 9 0xffffff7f8077c000 0x2d000 0x2d000 com.apple.iokit.IOStorageFamily (1.8) <7 6 5 4 3 1>
14 0 0xffffff7f81a7d000 0x1e000 0x1e000 com.apple.driver.DiskImages (344) <13 7 6 5 4 3 1>
15 0 0xffffff7f8241e000 0x29000 0x29000 com.apple.driver.AppleIntelCPUPowerManagement (196.0.0) <7 6 5 4 3 1>
16 0 0xffffff7f8075d000 0x3000 0x3000 com.apple.security.TMSafetyNet (7) <7 6 5 4 2 1>
17 2 0xffffff7f807f2000 0x4000 0x4000 com.apple.kext.AppleMatch (1.0.0d1) <4 1>
18 1 0xffffff7f807f6000 0x11000 0x11000 com.apple.security.sandbox (220) <17 7 6 5 4 3 2 1>
19 0 0xffffff7f80807000 0x6000 0x6000 com.apple.security.quarantine (2) <18 17 7 6 5 4 2 1>
20 0 0xffffff7f82746000 0x8000 0x8000 com.apple.nke.applicationfirewall (4.0.39) <7 6 5 4 3 1>
21 0 0xffffff7f82419000 0x3000 0x3000 com.apple.driver.AppleIntelCPUPowerManagementClient (196.0.0) <7 6 5 4 3 1>
22 0 0xffffff7f826ad000 0x3000 0x3000 com.apple.driver.AppleAPIC (1.6) <4 3>
23 0 0xffffff7f8233c000 0x4000 0x4000 com.apple.driver.AppleSMBIOS (1.9) <7 4 3>
24 0 0xffffff7f82453000 0x3000 0x3000 com.apple.driver.AppleHPET (1.7) <9 7 5 4 3>
25 0 0xffffff7f82366000 0x8000 0x8000 com.apple.driver.AppleRTC (1.5) <9 5 4 3 1>
26 0 0xffffff7f81e18000 0x13000 0x13000 org.netkas.driver.FakeSMC (4.3.5) <9 7 5 4 3>
27 5 0xffffff7f81770000 0x80000 0x80000 com.apple.iokit.IOHIDFamily (1.8.0) <12 7 6 5 4 3 2 1>
28 0 0xffffff7f8273f000 0x4000 0x4000 com.apple.driver.AppleACPIButtons (1.6) <27 11 9 7 6 5 4 3 1>
29 1 0xffffff7f82688000 0x5000 0x5000 com.apple.driver.AppleEFIRuntime (1.6.1) <7 6 5 4 3>
30 0 0xffffff7f8268d000 0x7000 0x7000 com.apple.driver.AppleEFINVRAM (1.6.1) <29 7 6 5 4 3>
31 9 0xffffff7f816e9000 0x62000 0x62000 com.apple.iokit.IOUSBFamily (5.4.0) <10 7 5 4 3 1>
32 0 0xffffff7f81828000 0x10000 0x10000 com.apple.driver.AppleUSBUHCI (5.2.5) <31 10 7 5 4 3 1>
33 0 0xffffff7f81874000 0x18000 0x18000 com.apple.driver.AppleUSBEHCI (5.4.0) <31 10 7 5 4 3 1>
34 3 0xffffff7f816aa000 0x32000 0x32000 com.apple.iokit.IONetworkingFamily (3.0) <7 6 5 4 3 1>
35 3 0xffffff7f81c28000 0x19000 0x19000 com.apple.iokit.IOAHCIFamily (2.2.1) <5 4 3 1>
36 0 0xffffff7f826b2000 0x19000 0x19000 com.apple.driver.AppleAHCIPort (2.4.1) <35 10 5 4 3 1>
37 0 0xffffff7f81f58000 0x9000 0x9000 com.apple.BootCache (34) <7 6 5 4 3 1>
38 0 0xffffff7f81800000 0x18000 0x18000 com.apple.driver.AppleUSBXHCI (1.4.0) <31 10 7 5 4 3 1>
39 0 0xffffff7f82679000 0x4000 0x4000 com.apple.AppleFSCompression.AppleFSCompressionTypeZlib (1.0.0d1) <6 4 3 2 1>
40 2 0xffffff7f815eb000 0x84000 0x84000 com.apple.iokit.IOFireWireFamily (4.5.5) <5 4 3 1>
41 0 0xffffff7f81ad8000 0x27000 0x27000 com.apple.driver.AppleFWOHCI (4.9.6) <40 10 7 6 5 4 3 1>
42 0 0xffffff7f8267f000 0x3000 0x3000 com.apple.AppleFSCompression.AppleFSCompressionTypeDataless (1.0.0d1) <7 6 4 3 2 1>
43 0 0xffffff7f81a3f000 0x33000 0x33000 com.apple.driver.AppleRTL8169Ethernet (1.1.4a5) <34 10 5 4 3 1>
44 0 0xffffff7f82684000 0x2000 0x2000 com.apple.driver.AppleFileSystemDriver (3.0.1) <13 4 3>
45 0 0xffffff7f8175f000 0x3000 0x3000 com.apple.iokit.IOUSBUserClient (5.2.5) <31 7 5 4 3 1>
46 0 0xffffff7f81859000 0x15000 0x15000 com.apple.driver.AppleUSBHub (5.2.5) <31 5 4 3 1>
47 1 0xffffff7f817f9000 0x7000 0x7000 com.apple.driver.AppleUSBComposite (5.2.5) <31 4 3 1>
48 0 0xffffff7f81852000 0x7000 0x7000 com.apple.driver.AppleUSBMergeNub (5.2.5) <47 31 4 3 1>
49 1 0xffffff7f82458000 0x4000 0x4000 com.apple.driver.AppleHIDMouse (175.8) <5 4 3>
50 2 0xffffff7f817f0000 0x9000 0x9000 com.apple.iokit.IOUSBHIDDriver (5.2.5) <31 27 5 4 3 1>
51 0 0xffffff7f8245c000 0x5000 0x5000 com.apple.driver.AppleUSBHIDMouse (175.8) <50 49 27 5 4 3>
52 1 0xffffff7f8247a000 0x4000 0x4000 com.apple.driver.AppleHIDKeyboard (165.5) <27 4 3>
53 0 0xffffff7f8247e000 0x4000 0x4000 com.apple.driver.AppleUSBHIDKeyboard (165.5) <52 50 27 4 3>
54 0 0xffffff7f81c4e000 0x16000 0x16000 com.apple.iokit.IOAHCIBlockStorage (2.2.2) <35 13 6 5 4 3 1>
55 0 0xffffff7f821f9000 0x3000 0x3000 com.apple.driver.XsanFilter (404) <13 5 4 3 1>
56 3 0xffffff7f8080e000 0x31000 0x31000 com.apple.iokit.IOSCSIArchitectureModelFamily (3.5.1) <5 4 3 1>
57 0 0xffffff7f81c41000 0xd000 0xd000 com.apple.iokit.IOAHCISerialATAPI (2.5.0) <56 35 5 4 3 1>
58 0 0xffffff7f8199d000 0x7000 0x7000 com.apple.iokit.SCSITaskUserClient (3.5.1) <56 13 5 4 3 1>
59 3 0xffffff7f819a8000 0x11000 0x11000 com.apple.iokit.IOCDStorageFamily (1.7.1) <13 5 4 3 1>
60 2 0xffffff7f819b9000 0xe000 0xe000 com.apple.iokit.IODVDStorageFamily (1.7.1) <59 13 5 4 3 1>
61 1 0xffffff7f819c7000 0xd000 0xd000 com.apple.iokit.IOBDStorageFamily (1.7) <60 59 13 5 4 3 1>
62 0 0xffffff7f819d4000 0x1e000 0x1e000 com.apple.iokit.IOSCSIMultimediaCommandsDevice (3.5.1) <61 60 59 56 13 5 4 3 1>
63 3 0xffffff7f819fb000 0xa000 0xa000 com.apple.driver.IOPlatformPluginFamily (5.2.0d16) <9 7 6 5 4 3>
64 1 0xffffff7f81a05000 0x14000 0x14000 com.apple.driver.IOPlatformPluginLegacy (1.0.0) <63 9 7 6 5 4 3>
65 2 0xffffff7f81a19000 0xf000 0xf000 com.apple.driver.AppleSMC (3.1.4d2) <9 7 5 4 3>
66 0 0xffffff7f81a28000 0x10000 0x10000 com.apple.driver.ACPI_SMC_PlatformPlugin (1.0.0) <65 64 63 10 9 7 6 5 4 3>
67 0 0xffffff7f81ac8000 0x10000 0x10000 com.apple.iokit.IOFireWireIP (2.2.5) <40 34 5 4 3 1>
68 9 0xffffff7f8088b000 0x43000 0x43000 com.apple.iokit.IOGraphicsFamily (2.3.5) <10 7 5 4 3>
69 5 0xffffff7f808ce000 0x14000 0x14000 com.apple.iokit.IONDRVSupport (2.3.5) <68 10 7 5 4 3>
70 4 0xffffff7f808e2000 0x31d000 0x31d000 com.apple.NVDAResman (3.0.4) <69 68 10 5 4 3 1>
71 0 0xffffff7f8125c000 0x340000 0x340000 com.apple.nvidia.nvGF100hal (3.0.4) <70 10 4 3>
72 0 0xffffff7f80f47000 0x315000 0x315000 com.apple.nvidia.nvGK100hal (3.0.4) <70 10 4 3>
73 0 0xffffff7f82328000 0x3000 0x3000 com.apple.driver.AppleSMBusPCI (1.0.10d0) <10 5 4 3>
74 1 0xffffff7f82665000 0x3000 0x3000 com.apple.driver.AppleGraphicsControl (3.2.11) <69 68 10 9 7 5 4 3 1>
75 0 0xffffff7f82668000 0xc000 0xc000 com.apple.driver.ApplePolicyControl (3.2.11) <74 69 68 10 9 7 5 4 3 1>
76 2 0xffffff7f82488000 0xf000 0xf000 com.apple.iokit.IOHDAFamily (2.3.1f2) <5 4 3 1>
77 1 0xffffff7f8249b000 0x16000 0x16000 com.apple.driver.AppleHDAController (2.3.1f2) <76 68 10 6 5 4 3 1>
78 0 0xffffff7f80bff000 0x348000 0x348000 com.apple.nvidia.nv50hal (3.0.4) <70 10 4 3>
79 1 0xffffff7f81983000 0x4000 0x4000 com.apple.iokit.IOSMBusFamily (1.1) <5 4 3>
80 1 0xffffff7f8232b000 0x11000 0x11000 com.apple.driver.AppleSMBusController (1.0.10d0) <79 10 9 5 4 3>
81 0 0xffffff7f81e2b000 0x5000 0x5000 com.apple.Dont_Steal_Mac_OS_X (7.0.0) <65 7 4 3 1>
82 0 0xffffff7f81b47000 0xad000 0xad000 com.apple.iokit.IOBluetoothFamily (4.0.9f33) <31 7 5 4 3 1>
83 0 0xffffff7f8196f000 0x14000 0x14000 com.apple.iokit.IOSurface (86.0.3) <7 5 4 3 1>
84 0 0xffffff7f81d08000 0xc4000 0xc4000 com.apple.GeForce (8.0.1) <70 69 68 10 7 6 5 4 3 1>
85 0 0xffffff7f816dc000 0x7000 0x7000 com.apple.iokit.IOUserEthernet (1.0.0d1) <34 6 5 4 3 1>
86 0 0xffffff7f823d9000 0xc000 0xc000 com.apple.driver.AppleMCCSControl (1.0.33) <80 68 10 9 7 5 4 3 1>
87 0 0xffffff7f8224e000 0x5000 0x5000 com.apple.driver.AppleUpstreamUserClient (3.5.10) <68 10 9 7 5 4 3 1>
88 2 0xffffff7f824b1000 0x7000 0x7000 com.apple.kext.OSvKernDSPLib (1.6) <5 4>
89 2 0xffffff7f824b8000 0x36000 0x36000 com.apple.iokit.IOAudioFamily (1.8.9fc10) <88 5 4 3 1>
90 1 0xffffff7f824ee000 0xbf000 0xbf000 com.apple.driver.DspFuncLib (2.3.1f2) <89 88 5 4 3 1>
91 0 0xffffff7f825ad000 0x7b000 0x7b000 com.apple.driver.AppleHDA (2.3.1f2) <90 89 77 76 69 68 6 5 4 3 1>
92 0 0xffffff7f82497000 0x2000 0x2000 com.apple.driver.AppleHDAHardwareConfigDriver (2.3.1f2) <4 3>
93 0 0xffffff7f82257000 0x9000 0x9000 com.apple.driver.AppleTyMCEDriver (1.0.2d2) <63 10 9 7 6 5 4 3 1>
94 1 0xffffff7f8198c000 0x11000 0x11000 com.apple.iokit.IOSerialFamily (10.0.6) <7 6 5 4 3 1>
95 0 0xffffff7f81b33000 0xa000 0xa000 com.apple.iokit.IOBluetoothSerialManager (4.0.9f33) <94 7 5 4 3 1>
96 1 0xffffff7f81f63000 0x5000 0x5000 com.apple.kext.triggers (1.0) <7 6 5 4 3 1>
97 0 0xffffff7f81f68000 0x9000 0x9000 com.apple.filesystems.autofs (3.0) <96 7 6 5 4 3 1>
98 0 0xffffff7f8244a000 0x5000 0x5000 com.apple.driver.AppleHWSensor (1.9.5d0) <5 4 3>