I'm planning a multi-GPU system with an RTX 50-series card as the main rendering GPU, a smaller Nvidia card—possibly a low-profile RTX 3050—dedicated to PhysX in older 32-bit games, and an older low-profile Radeon card connected to a CRT through CRT_Emudriver. The Radeon would handle display output for emulation and compatible pixel-art games, while rendering would remain on the RTX 50-series card. Is this setup technically workable, and are there any major driver, PCIe-lane, or software issues I should expect?
4 Answers
The extra Nvidia card can make sense if you specifically need hardware PhysX in an older 32-bit title that the RTX 50 series does not support properly. In unsupported games, the PhysX workload may fall back to the CPU and cause major frame drops. It’s worth checking each game individually, since some titles already work correctly on newer cards.
For a card that is only sending a display signal, PCIe bandwidth usually isn’t a major concern. The more important issues are whether the motherboard can physically fit all three cards, whether the slots remain usable with your cooler installed, and how the firmware and drivers handle multiple display adapters. Check the board’s lane-sharing diagram before buying anything.
The Radeon card should generally be manageable, but selecting the correct GPU for each program can occasionally be awkward. Make sure the motherboard and CPU provide enough PCIe lanes for the layout you want. If the cards are forced into x8, x4, and x1 slots, most workloads will still function, but lower bandwidth can sometimes affect performance or frame-time consistency.
If the Radeon is only being used to drive the CRT output, does its limited PCIe bandwidth really matter?
This should work in practice. Someone is already running a similar setup with an RTX 5070 Ti, an RTX 3050 6GB, and a Radeon integrated GPU. You may not need anything beyond the normal Nvidia drivers and control panel, although individual games and display-routing settings can sometimes require manual configuration.
Would any special software be needed beyond the standard Nvidia drivers or control panel?
One example I care about is Borderlands: The Pre-Sequel, which doesn’t appear to be on the supported-title list. That’s why I’m considering a dedicated 3050.