IDE UDMA Registry Options in Windows 8 still?

skibum1

New Member
Messages
9
Hello,

The first question I can imagine you are thinking is what am I talking about or why? : )

For a project I am working on we are using Windows 8.1 with SATA configuration in IDE. Not AHCI.


A few years ago you use to be able to go to the following [FONT=&amp]Hard Disk Controller ClassGuid[/FONT]

registry:


HKLM\System\CCS\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}


And set the UDMA mode by adding the following DWORDS in the registry:


MasterDeviceTimingModeAllowed 0xFFFFFFFF
SlaveDeviceTimingModeAllowed 0xFFFFFFFF
UserMasterDeviceTimingModeAllowed 0xFFFFFFFF
UserSlaveDeviceTimingModeAllowed 0xFFFFFFFF
MasterDeviceTimingMode 0xFFFF
SlaveDeviceTimingMode 0xFFFF

Where 0xFFFFFFF could be changed to the following to set the IDE UDMA speed:


for Ultra ATA33 (33.3MB/s) - 0x2010
for Ultra ATA66 (66.7 MB/s)- 0x8010
for Ultra ATA100 (100MB/s) - 0x10010
for Ultra ATA133 (133 Mb/s) - 0x12010


Where some of the different UDMA modes are shown here:
[FONT=&amp]Mode 0[/FONT]
[FONT=&amp]16.7[/FONT]​
[FONT=&amp]MB/s[/FONT]​
[FONT=&amp]Mode 1[/FONT]
[FONT=&amp]25.0[/FONT]​
[FONT=&amp]MB/s[/FONT]​
[FONT=&amp]Mode 2[/FONT]
[FONT=&amp]33.3[/FONT]​
[FONT=&amp]MB/s[/FONT]​
[FONT=&amp]Mode 3[/FONT]
[FONT=&amp]44.4[/FONT]​
[FONT=&amp]MB/s[/FONT]​
[FONT=&amp]Mode 4[/FONT]
[FONT=&amp]66.7[/FONT]​
[FONT=&amp]MB/s[/FONT]​
[FONT=&amp]Mode 5[/FONT]
[FONT=&amp]100.0[/FONT]​
[FONT=&amp]MB/s[/FONT]​

The registry:


HKLM\System\CCS\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}


and all the proper sub registries still exists in Windows 8/8.1 but I cannot get Windows 8 to change from UDMA Mode 5.



Anybody?
 

My Computer

System One

  • OS
    Windows 8.1
    Computer type
    PC/Desktop
I have since found out the above commands only work with the out of date Intel Application Accelerator. This no longer works with Windows 8.

Does anyone know a registry hack to lower the UDMA setting in Windows 8?
 

My Computer

System One

  • OS
    Windows 8.1
    Computer type
    PC/Desktop
Use an old 40 wire data cable, it will drop to UDMA 33 all by itself (BIOS might complain though).
 

My Computer

System One

  • OS
    Windows 8.1 Pro
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Home made
    CPU
    AMD Ryzen7 2700x
    Motherboard
    Asus Prime x470 Pro
    Memory
    16GB Kingston 3600
    Graphics Card(s)
    Asus strix 570 OC 4gb
    Hard Drives
    Samsung 960 evo 250GB
    Silicon Power V70 240GB SSD
    WD 1 TB Blue
    WD 2 TB Blue
    Bunch of backup HDDs.
    PSU
    Sharkoon, Silent Storm 660W
    Case
    Raidmax
    Cooling
    CCM Nepton 140xl
    Internet Speed
    40/2 Mbps
    Browser
    Firefox
    Antivirus
    WD
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