If you want to speed up your transfer rate, because your device is currently running in PIO mode 4, you got to enable DMA.
DMA (Direct Memory Access) will increase your device transfer rates. This is a tutorial that will help you to enable DMA in Windows 7.
DMA can dramatically increase your transfer rate and overall performance.
Warning: Before you enable DMA, make sure that you download and install the latest Windows 7 ADMA patch or you might damage your SD cards.
Enable DMA – Speed up transfer rate
Make sure that you are logged in as administrator!
1. Open the explorer (STRG+E)
2. Right-click on “Computer” and click on “Manage”
3. Click on “Device Manager”
4. Uncollapse IDE ATA/ATAPI controllers
5. Right-click on any label where “Channel” is part of the name – Click on Properties
6. Go to the Advanced Settings tab, under Device Properties check “Enable DMA”