Dual GPU PCIe configuration comparison AMD Ryzen 5 3600 6-Core testing with a ASUS PRIME X570-P (1405 BIOS) and Sapphire AMD Radeon RX 5700 / XT 8GB on ManjaroLinux 18.1.5 via the Phoronix Test Suite. 2 cards prime offload to PCIe 4.0x4 slot: Processor: AMD Ryzen 5 3600 6-Core @ 3.60GHz (6 Cores / 12 Threads), Motherboard: ASUS PRIME X570-P (1405 BIOS), Chipset: AMD Starship/Matisse, Memory: 16384MB, Disk: 2000GB Western Digital WD20EARS-00M + 240GB SanDisk SDSSDX24 + 3001GB Western Digital WD30EZRX-00D + 3001GB Western Digital WD30EFRX-68E, Graphics: Sapphire AMD Radeon RX 5700 / XT 2GB (2080/875MHz), Audio: AMD Navi 10 HDMI Audio, Monitor: KAMN341FQULA, Network: Realtek RTL8111/8168/8411 OS: ManjaroLinux 18.1.5, Kernel: 5.5.0-1-MANJARO (x86_64), Desktop: GNOME Shell 3.34.3, Display Server: X Server 1.20.7, OpenGL: 4.6 Mesa 20.0.0-devel (git-02658df152) (LLVM 11.0.0), Vulkan: 1.2.128, Compiler: GCC 9.2.0 + Clang 11.0.0, File-System: f2fs, Screen Resolution: 3440x1440 Single card PCIe 4.0x4 slot: Processor: AMD Ryzen 5 3600 6-Core @ 3.60GHz (6 Cores / 12 Threads), Motherboard: ASUS PRIME X570-P (1405 BIOS), Chipset: AMD Starship/Matisse, Memory: 16384MB, Disk: 240GB SanDisk SDSSDX24 + 2000GB Western Digital WD20EARS-00M + 3001GB Western Digital WD30EZRX-00D + 3001GB Western Digital WD30EFRX-68E, Graphics: Sapphire AMD Radeon RX 5700 / XT 8GB (2080/875MHz), Audio: AMD Navi 10 HDMI Audio, Monitor: KAMN341FQULA, Network: Realtek RTL8111/8168/8411 OS: ManjaroLinux 18.1.5, Kernel: 5.5.0-1-MANJARO (x86_64), Desktop: GNOME Shell 3.34.3, Display Server: X Server 1.20.7, OpenGL: 4.6 Mesa 20.0.0-devel (git-02658df152) (LLVM 11.0.0), Vulkan: 1.2.128, Compiler: GCC 9.2.0 + Clang 11.0.0, File-System: f2fs, Screen Resolution: 3440x1440 Single card PCIe 4.0x16 slot: Processor: AMD Ryzen 5 3600 6-Core @ 3.60GHz (6 Cores / 12 Threads), Motherboard: ASUS PRIME X570-P (1405 BIOS), Chipset: AMD Starship/Matisse, Memory: 16384MB, Disk: 2000GB Western Digital WD20EARS-00M + 240GB SanDisk SDSSDX24 + 3001GB Western Digital WD30EZRX-00D + 3001GB Western Digital WD30EFRX-68E, Graphics: Sapphire AMD Radeon RX 5700 / XT 8GB (2080/875MHz), Audio: AMD Navi 10 HDMI Audio, Monitor: KAMN341FQULA, Network: Realtek RTL8111/8168/8411 OS: ManjaroLinux 18.1.5, Kernel: 5.5.0-1-MANJARO (x86_64), Desktop: GNOME Shell 3.34.3, Display Server: X Server 1.20.7, OpenGL: 4.6 Mesa 20.0.0-devel (git-02658df152) (LLVM 11.0.0), Vulkan: 1.2.128, Compiler: GCC 9.2.0 + Clang 11.0.0, File-System: f2fs, Screen Resolution: 3440x1440 Unigine Superposition 1.0 Resolution: 3440 x 1440 - Mode: Fullscreen - Quality: High - Renderer: OpenGL Frames Per Second > Higher Is Better 2 cards prime offload to PCIe 4.0x4 slot . 32.7 |=========================== Single card PCIe 4.0x4 slot .............. 35.8 |============================== Single card PCIe 4.0x16 slot ............. 35.9 |============================== Unigine Superposition 1.0 CPU Peak Freq (Highest CPU Core Frequency) Monitor Megahertz > Higher Is Better 2 cards prime offload to PCIe 4.0x4 slot . MIN: 3596 AVG: 4091 MAX: 4129 Single card PCIe 4.0x4 slot .............. MIN: 3594 AVG: 4088 MAX: 4169 Single card PCIe 4.0x16 slot ............. MIN: 3593 AVG: 4091 MAX: 4182 Unigine Superposition 1.0 CPU Temperature Monitor Celsius < Lower Is Better 2 cards prime offload to PCIe 4.0x4 slot . MIN: 39.5 AVG: 51.8 MAX: 70.0 Single card PCIe 4.0x4 slot .............. MIN: 38.9 AVG: 51.2 MAX: 67.4 Single card PCIe 4.0x16 slot ............. MIN: 47.3 AVG: 53.2 MAX: 64.4 Unigine Superposition 1.0 GPU Frequency Monitor Megahertz > Higher Is Better 2 cards prime offload to PCIe 4.0x4 slot . MIN: 800 AVG: 1809 MAX: 2080 Single card PCIe 4.0x4 slot .............. MIN: 800 AVG: 1749 MAX: 2080 Single card PCIe 4.0x16 slot ............. MIN: 800 AVG: 1752 MAX: 2080 Unigine Superposition 1.0 GPU Power Consumption Monitor Watts < Lower Is Better 2 cards prime offload to PCIe 4.0x4 slot . MIN: 10 AVG: 162 MAX: 235 Single card PCIe 4.0x4 slot .............. MIN: 31 AVG: 167 MAX: 215 Single card PCIe 4.0x16 slot ............. MIN: 32 AVG: 166 MAX: 253 Unigine Superposition 1.0 GPU Temperature Monitor Celsius < Lower Is Better 2 cards prime offload to PCIe 4.0x4 slot . MIN: 45.0 AVG: 67.9 MAX: 75.0 Single card PCIe 4.0x4 slot .............. MIN: 48.0 AVG: 67.7 MAX: 75.0 Single card PCIe 4.0x16 slot ............. MIN: 48.0 AVG: 65.5 MAX: 72.0 Unigine Superposition 1.0 GPU Usage Monitor Percent < Lower Is Better 2 cards prime offload to PCIe 4.0x4 slot . MIN: 21 AVG: 98 MAX: 99 Single card PCIe 4.0x4 slot .............. MIN: 2 AVG: 98 MAX: 99 Single card PCIe 4.0x16 slot ............. MIN: 4 AVG: 98 MAX: 99