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.
HTML result view exported from: https://openbenchmarking.org/result/2002020-UNIT-PCIESLO12 .
Dual GPU PCIe configuration comparison Processor Motherboard Chipset Memory Disk Graphics Audio Monitor Network OS Kernel Desktop Display Server OpenGL Vulkan Compiler File-System Screen Resolution 2 cards prime offload to PCIe 4.0x4 slot Single card PCIe 4.0x4 slot Single card PCIe 4.0x16 slot AMD Ryzen 5 3600 6-Core @ 3.60GHz (6 Cores / 12 Threads) ASUS PRIME X570-P (1405 BIOS) AMD Starship/Matisse 16384MB 2000GB Western Digital WD20EARS-00M + 240GB SanDisk SDSSDX24 + 3001GB Western Digital WD30EZRX-00D + 3001GB Western Digital WD30EFRX-68E Sapphire AMD Radeon RX 5700 / XT 2GB (2080/875MHz) AMD Navi 10 HDMI Audio KAMN341FQULA Realtek RTL8111/8168/8411 ManjaroLinux 18.1.5 5.5.0-1-MANJARO (x86_64) GNOME Shell 3.34.3 X Server 1.20.7 4.6 Mesa 20.0.0-devel (git-02658df152) (LLVM 11.0.0) 1.2.128 GCC 9.2.0 + Clang 11.0.0 f2fs 3440x1440 240GB SanDisk SDSSDX24 + 2000GB Western Digital WD20EARS-00M + 3001GB Western Digital WD30EZRX-00D + 3001GB Western Digital WD30EFRX-68E Sapphire AMD Radeon RX 5700 / XT 8GB (2080/875MHz) 2000GB Western Digital WD20EARS-00M + 240GB SanDisk SDSSDX24 + 3001GB Western Digital WD30EZRX-00D + 3001GB Western Digital WD30EFRX-68E OpenBenchmarking.org Kernel Details - amdgpu.ppfeaturemask=0xfffd7fff Environment Details - 2 cards prime offload to PCIe 4.0x4 slot: DRI_PRIME=1 Processor Details - Scaling Governor: acpi-cpufreq performance - CPU Microcode: 0x8701013 Security Details - itlb_multihit: Not affected + l1tf: Not affected + mds: Not affected + meltdown: Not affected + spec_store_bypass: Mitigation of SSB disabled via prctl and seccomp + spectre_v1: Mitigation of usercopy/swapgs barriers and __user pointer sanitization + spectre_v2: Mitigation of Full AMD retpoline IBPB: conditional STIBP: conditional RSB filling + tsx_async_abort: Not affected
Dual GPU PCIe configuration comparison unigine-super: 3440 x 1440 - Fullscreen - High - OpenGL Difference 2 cards prime offload to PCIe 4.0x4 slot Single card PCIe 4.0x4 slot Single card PCIe 4.0x16 slot 32.7 1.00x 35.8 1.09x 35.9 1.10x OpenBenchmarking.org
Unigine Superposition Resolution: 3440 x 1440 - Mode: Fullscreen - Quality: High - Renderer: OpenGL OpenBenchmarking.org Frames Per Second, More Is Better Unigine Superposition 1.0 Resolution: 3440 x 1440 - Mode: Fullscreen - Quality: High - Renderer: OpenGL 2 cards prime offload to PCIe 4.0x4 slot Single card PCIe 4.0x4 slot Single card PCIe 4.0x16 slot 8 16 24 32 40 32.7 35.8 35.9 MAX: 36.1 MAX: 39.9 MAX: 40
Unigine Superposition CPU Peak Freq (Highest CPU Core Frequency) Monitor Min Avg Max 2 cards prime offload to PCIe 4.0x4 slot 3596 4091 4129 Single card PCIe 4.0x4 slot 3594 4088 4169 Single card PCIe 4.0x16 slot 3593 4091 4182 OpenBenchmarking.org Megahertz, More Is Better Unigine Superposition 1.0 CPU Peak Freq (Highest CPU Core Frequency) Monitor 1100 2200 3300 4400 5500
Unigine Superposition CPU Temperature Monitor Min Avg Max 2 cards prime offload to PCIe 4.0x4 slot 39.5 51.8 70.0 Single card PCIe 4.0x4 slot 38.9 51.2 67.4 Single card PCIe 4.0x16 slot 47.3 53.2 64.4 OpenBenchmarking.org Celsius, Fewer Is Better Unigine Superposition 1.0 CPU Temperature Monitor 20 40 60 80 100
Unigine Superposition GPU Frequency Monitor Min Avg Max 2 cards prime offload to PCIe 4.0x4 slot 800 1809 2080 Single card PCIe 4.0x4 slot 800 1749 2080 Single card PCIe 4.0x16 slot 800 1752 2080 OpenBenchmarking.org Megahertz, More Is Better Unigine Superposition 1.0 GPU Frequency Monitor 500 1000 1500 2000 2500
Unigine Superposition GPU Power Consumption Monitor Min Avg Max 2 cards prime offload to PCIe 4.0x4 slot 10.0 162.2 235.0 Single card PCIe 4.0x4 slot 31.0 166.7 215.0 Single card PCIe 4.0x16 slot 32.0 166.3 253.0 OpenBenchmarking.org Watts, Fewer Is Better Unigine Superposition 1.0 GPU Power Consumption Monitor 70 140 210 280 350
Unigine Superposition GPU Temperature Monitor Min Avg Max 2 cards prime offload to PCIe 4.0x4 slot 45.0 67.9 75.0 Single card PCIe 4.0x4 slot 48.0 67.7 75.0 Single card PCIe 4.0x16 slot 48.0 65.5 72.0 OpenBenchmarking.org Celsius, Fewer Is Better Unigine Superposition 1.0 GPU Temperature Monitor 20 40 60 80 100
Unigine Superposition GPU Usage Monitor Min Avg Max 2 cards prime offload to PCIe 4.0x4 slot 21.0 98.5 99.0 Single card PCIe 4.0x4 slot 2.0 97.8 99.0 Single card PCIe 4.0x16 slot 4.0 98.4 99.0 OpenBenchmarking.org Percent, Fewer Is Better Unigine Superposition 1.0 GPU Usage Monitor 20 40 60 80 100
Phoronix Test Suite v10.8.4