DMA Card 75T Guide
This guide shows how to set up a 75T DMA card and fix the most common connection / speed issues.
Need a card? You can buy it here:
https://wheat-emu-663549.hostingersite.com/product-category/dma-cards/
Recommended Hardware
- Recommended USB cable — Purchase USB Cable
- Need more space in the case? — Purchase PCIe Extender
- No second PC? We recommend a Mini PC
- Recommended OS — Windows 10 or Windows 11
DMA Card Installation
- Download and keep the DMA Cheats folder on your Second PC.
- Only move the files to the Main PC that the instructions specifically say must run there.
- Do not download or run DMA cheats on the Main PC.
1) Power off your main PC and install the DMA card into an available PCI-Express slot (x1, x4, or x16) on the motherboard.
2) Connect the USB 3.0 cable to the DMA card’s data port.
3) Plug the other end of the cable into a USB 3.0 port on the second PC.
4) Power on the DMA card, then turn on both the main PC and the second PC.
5) On the second PC, run CH341SER.exe as administrator
6) Select Install
7) If you get “Driver Install Success!” then you did everything right so far.
8) On the second PC, open the DMA test folder and launch the RunMe file.
< 60 MB/s — bad speed, you need to get a better USB Cable or try another USB 3.x Port
>= 100 MB/s — good speed
>= 150 MB/s — great speed
Video Manual
Second PC doesn’t detect the DMA card
- Make sure the DMA card is powered ON (if your model has a switch).
- Try a different PCIe slot (if available).
- Disconnect other PCIe devices (except the GPU) and test again.
- Disable Intel VT-d (or AMD IOMMU) in BIOS.
- Try a different USB 3 cable and a different USB 3 port.
- In BIOS → Advanced / PCIe settings, switch PCIe to Gen1 or Gen2.
- If nothing helps, test with another Second PC (or reinstall Windows on the Second PC).
DMA Speed test failed
If the device appears in Device Manager but the test won’t run, this video usually fixes it:
Low DMA speed test result
- Try a different PCIe slot.
- Use a better USB 3 cable and try another USB 3 port.
- Make sure the Second PC is strong enough (CPU not older than ~7 years, and 12GB+ RAM).
- If the above doesn’t help, it may be firmware-related — ask the developer to replace it.
After installing firmware
- If speed test stops working after flashing firmware, do a cold boot:
- Turn off the Main PC and cut power (switch off PSU or unplug the power cable).
- Wait 30 seconds.
- Reconnect the USB cable to the DATA port, restore power, and boot Main PC.
- Run the DMA speed test again on the Second PC.
Where to download?
You can download the DMA Cheats folder here:
https://wheat-emu-663549.hostingersite.com/download
