Intel Arc Pro B60 stuck at PCIe Gen1 x1 and ~21GB VRAM in Proxmox Intel Arc Pro B60 graphics cards are stuck at PCIe Gen1 x1 and report about 21GB of VRAM instead of the advertised 24GB in a Proxmox system, according to a user on the Proxmox forum. The user, running an AMD EPYC 7K62 with a Supermicro H12SSL-i motherboard, found that both cards (device ID 8086:e211) are recognized by the xe driver but fail to be detected by Intel's tools, and BIOS settings like Resizable BAR and Above 4G Decoding did not resolve the link issue. I need help with a couple recently purchased Intel Arc Pro B60s in my Proxmox system EPYC 7K62, Supermicro H12SSL-i, 128GB ECC DDR4 . I bought the ARKN variants from Newegg product page https://www.newegg.com/arkn-8357-00128-arc-pro-b60-24gb-graphics/p/N82E16814983001 and started noticing issues pretty much right away. My original plan was to pass them straight through to a VM for local inference using VFIO, but none of the Intel tools I tried, clinfo and the Level Zero tools, were picking them up as GPUs. Because of that I started digging into what the cards looked like from the host side. That’s where things started looking weird. The PCIe link negotiation for both cards only shows Gen1 x1 at 2.5GT/s. I double checked the usual BIOS settings, Resizable BAR, Above 4G Decoding, SR-IOV support, and made sure all the x16 slots are forced to x16 instead of Auto . None of that changed the link behavior. I also noticed the card is being reported with about 21GB of VRAM instead of the 24GB listed on the product page. Funny enough, there’s a reviewer on the Newegg page saying they couldn’t get 24GB out of it either, along with this YouTube video https://www.youtube.com/watch?v=0clT6fWeWMI . At this point I’m not really sure where to go next. If anyone has experience getting these cards working properly in a setup like this, I’d appreciate the advice. Here are some relevant details from what I’ve found so far: root@proxmox:~ ./gpu debug.sh ========== SYSTEM ========== COMMAND: uname -r OUTPUT: 6.17.13-2-pve COMMAND: pveversion OUTPUT: pve-manager/9.1.6/71482d1833ded40a running kernel: 6.17.13-2-pve COMMAND: cat /proc/cmdline OUTPUT: BOOT IMAGE=/boot/vmlinuz-6.17.13-2-pve root=/dev/mapper/pve-root ro quiet amd iommu=on iommu=pt pcie aspm=off pcie acs override=downstream,multifunction pci=realloc COMMAND: lscpu | grep 'Model name' OUTPUT: Model name: AMD EPYC 7K62 48-Core Processor COMMAND: dmidecode -t baseboard | grep -E 'Manufacturer|Product|Version' OUTPUT: Manufacturer: Supermicro Product Name: H12SSL-i Version: 1.10 ========== GPU DEVICES ========== COMMAND: lspci -nn | grep -E 'VGA|3D' OUTPUT: 43:00.0 VGA compatible controller 0300 : ASPEED Technology, Inc. ASPEED Graphics Family 1a03:2000 rev 41 83:00.0 VGA compatible controller 0300 : Intel Corporation Battlemage G21 Intel Graphics 8086:e211 c1:00.0 VGA compatible controller 0300 : NVIDIA Corporation GB205 GeForce RTX 5070 10de:2f04 rev a1 c4:00.0 VGA compatible controller 0300 : Intel Corporation Battlemage G21 Intel Graphics 8086:e211 COMMAND: lspci -nnk -d 8086:e211 OUTPUT: 83:00.0 VGA compatible controller 0300 : Intel Corporation Battlemage G21 Intel Graphics 8086:e211 Subsystem: Device 207e:a023 Kernel driver in use: xe Kernel modules: xe c4:00.0 VGA compatible controller 0300 : Intel Corporation Battlemage G21 Intel Graphics 8086:e211 Subsystem: Device 207e:a023 Kernel driver in use: xe Kernel modules: xe COMMAND: lspci -tv OUTPUT: -+- 0000:00 -+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse Root Complex | +-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse IOMMU | +-01.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-02.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-03.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-03.3- 01 ----00.0 Sandisk Corp WD Black SN770 / PC SN740 256GB / PC SN560 DRAM-less NVMe SSD | +-03.4- 02 ----00.0 Samsung Electronics Co Ltd NVMe SSD Controller S4LV008 Pascal | +-04.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-05.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-07.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-07.1- 03 --+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Function | | \-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse PTDMA | +-08.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-08.1- 04 --+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse Reserved SPP | | +-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse PTDMA | | \-00.3 Advanced Micro Devices, Inc. AMD Starship USB 3.0 Host Controller | +-14.0 Advanced Micro Devices, Inc. AMD FCH SMBus Controller | +-14.3 Advanced Micro Devices, Inc. AMD FCH LPC Bridge | +-18.0 Advanced Micro Devices, Inc. AMD Starship Device 24; Function 0 | +-18.1 Advanced Micro Devices, Inc. AMD Starship Device 24; Function 1 | +-18.2 Advanced Micro Devices, Inc. AMD Starship Device 24; Function 2 | +-18.3 Advanced Micro Devices, Inc. AMD Starship Device 24; Function 3 | +-18.4 Advanced Micro Devices, Inc. AMD Starship Device 24; Function 4 | +-18.5 Advanced Micro Devices, Inc. AMD Starship Device 24; Function 5 | +-18.6 Advanced Micro Devices, Inc. AMD Starship Device 24; Function 6 | \-18.7 Advanced Micro Devices, Inc. AMD Starship Device 24; Function 7 +- 0000:40 -+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse Root Complex | +-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse IOMMU | +-01.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-02.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-03.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-03.3- 41 ----00.0 ASMedia Technology Inc. ASM1042A USB 3.0 Host Controller | +-03.4- 42-43 ----00.0- 43 ----00.0 ASPEED Technology, Inc. ASPEED Graphics Family | +-03.5- 44 ----00.0 ASMedia Technology Inc. ASM1042A USB 3.0 Host Controller | +-03.6- 45 --+-00.0 Broadcom Inc. and subsidiaries NetXtreme BCM5720 Gigabit Ethernet PCIe | | \-00.1 Broadcom Inc. and subsidiaries NetXtreme BCM5720 Gigabit Ethernet PCIe | +-04.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-05.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-07.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-07.1- 46 --+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Function | | \-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse PTDMA | +-08.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-08.1- 47 --+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse Reserved SPP | | +-00.1 Advanced Micro Devices, Inc. AMD Starship/Matisse Cryptographic Coprocessor PSPCPP | | +-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse PTDMA | | \-00.3 Advanced Micro Devices, Inc. AMD Starship USB 3.0 Host Controller | +-08.2- 48 ----00.0 Advanced Micro Devices, Inc. AMD FCH SATA Controller AHCI mode | \-08.3- 49 ----00.0 Advanced Micro Devices, Inc. AMD FCH SATA Controller AHCI mode +- 0000:80 -+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse Root Complex | +-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse IOMMU | +-01.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-01.1- 81-84 ----00.0- 82-84 --+-01.0- 83 ----00.0 Intel Corporation Battlemage G21 Intel Graphics | | \-02.0- 84 ----00.0 Intel Corporation Device e2f7 | +-02.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-03.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-04.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-05.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-07.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-07.1- 85 --+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Function | | \-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse PTDMA | +-08.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge | +-08.1- 86 --+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse Reserved SPP | | \-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse PTDMA | +-08.2- 87 ----00.0 Advanced Micro Devices, Inc. AMD FCH SATA Controller AHCI mode | \-08.3- 88 ----00.0 Advanced Micro Devices, Inc. AMD FCH SATA Controller AHCI mode \- 0000:c0 -+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse Root Complex +-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse IOMMU +-01.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge +-01.1- c1 --+-00.0 NVIDIA Corporation GB205 GeForce RTX 5070 | \-00.1 NVIDIA Corporation Device 2f80 +-02.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge +-03.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge +-03.1- c2-c5 ----00.0- c3-c5 --+-01.0- c4 ----00.0 Intel Corporation Battlemage G21 Intel Graphics | \-02.0- c5 ----00.0 Intel Corporation Device e2f7 +-04.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge +-05.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge +-07.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge +-07.1- c6 --+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Function | \-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse PTDMA +-08.0 Advanced Micro Devices, Inc. AMD Starship/Matisse PCIe Dummy Host Bridge \-08.1- c7 --+-00.0 Advanced Micro Devices, Inc. AMD Starship/Matisse Reserved SPP \-00.2 Advanced Micro Devices, Inc. AMD Starship/Matisse PTDMA ========== PCIe LINK STATE ========== COMMAND: lspci -vv -s 83:00.0 | grep -E 'LnkCap:|LnkSta:|LnkCap2:' OUTPUT: LnkCap: Port 0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us LnkSta: Speed 2.5GT/s, Width x1 LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 2Retimers- DRS- COMMAND: lspci -vv -s c4:00.0 | grep -E 'LnkCap:|LnkSta:|LnkCap2:' OUTPUT: LnkCap: Port 0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us LnkSta: Speed 2.5GT/s, Width x1 LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 2Retimers- DRS- ========== BAR / VRAM APERTURE ========== COMMAND: lspci -vv -s 83:00.0 | grep -E 'Region 2|Resizable BAR' OUTPUT: Region 2: Memory at 1e800000000 64-bit, prefetchable size=32G Capabilities: 420 v1 Physical Resizable BAR Capabilities: 220 v1 Virtual Resizable BAR Region 2: Memory at 000001f000000000 64-bit, prefetchable COMMAND: lspci -vv -s c4:00.0 | grep -E 'Region 2|Resizable BAR' OUTPUT: Region 2: Memory at 16000000000 64-bit, prefetchable size=32G Capabilities: 420 v1 Physical Resizable BAR Capabilities: 220 v1 Virtual Resizable BAR Region 2: Memory at 0000016800000000 64-bit, prefetchable ========== VRAM DETECTED BY XE DRIVER ========== COMMAND: dmesg | grep -E 'VRAM\ |VISIBLE VRAM' OUTPUT: 10.962210 xe 0000:c4:00.0: drm VISIBLE VRAM: 0x0000016000000000, 0x0000000800000000 10.962245 xe 0000:c4:00.0: drm VRAM 0 : Actual physical size 0x0000000540000000, usable size exclude stolen 0x000000053a600000, CPU accessible size 0x000000053a600000 10.962250 xe 0000:c4:00.0: drm VRAM 0 : DPA range: 0x0000000000000000-540000000 , io range: 0x0000016000000000-1653a600000 10.962254 xe 0000:c4:00.0: drm VRAM 0 : Actual physical size 0x0000000540000000, usable size exclude stolen 0x000000053a600000, CPU accessible size 0x000000053a600000 10.962257 xe 0000:c4:00.0: drm VRAM 0 : DPA range: 0x0000000000000000-540000000 , io range: 0x0000016000000000-1653a600000 11.680582 xe 0000:83:00.0: drm VISIBLE VRAM: 0x000001e800000000, 0x0000000800000000 11.680700 xe 0000:83:00.0: drm VRAM 0 : Actual physical size 0x0000000540000000, usable size exclude stolen 0x000000053a600000, CPU accessible size 0x000000053a600000 11.680704 xe 0000:83:00.0: drm VRAM 0 : DPA range: 0x0000000000000000-540000000 , io range: 0x000001e800000000-1ed3a600000 11.680709 xe 0000:83:00.0: drm VRAM 0 : Actual physical size 0x0000000540000000, usable size exclude stolen 0x000000053a600000, CPU accessible size 0x000000053a600000 11.680712 xe 0000:83:00.0: drm VRAM 0 : DPA range: 0x0000000000000000-540000000 , io range: 0x000001e800000000-1ed3a600000 ========== XE DRIVER STATE ========== COMMAND: modinfo xe | grep -E 'filename|vermagic|srcversion' OUTPUT: filename: /lib/modules/6.17.13-2-pve/kernel/drivers/gpu/drm/xe/xe.ko srcversion: 9DF73FAD15D81C9378B16E4 vermagic: 6.17.13-2-pve SMP preempt mod unload modversions COMMAND: dmesg | grep -E 'xe . drm' OUTPUT: 10.960229 xe 0000:c4:00.0: drm Running in SR-IOV PF mode 10.960461 xe 0000:c4:00.0: drm Found battlemage device ID e211 discrete display version 14.01 stepping B0 10.962210 xe 0000:c4:00.0: drm VISIBLE VRAM: 0x0000016000000000, 0x0000000800000000 10.962245 xe 0000:c4:00.0: drm VRAM 0 : Actual physical size 0x0000000540000000, usable size exclude stolen 0x000000053a600000, CPU accessible size 0x000000053a600000 10.962250 xe 0000:c4:00.0: drm VRAM 0 : DPA range: 0x0000000000000000-540000000 , io range: 0x0000016000000000-1653a600000 10.962254 xe 0000:c4:00.0: drm VRAM 0 : Actual physical size 0x0000000540000000, usable size exclude stolen 0x000000053a600000, CPU accessible size 0x000000053a600000 10.962257 xe 0000:c4:00.0: drm VRAM 0 : DPA range: 0x0000000000000000-540000000 , io range: 0x0000016000000000-1653a600000 11.118986 xe 0000:c4:00.0: drm GT0: Using GuC firmware from xe/bmg guc 70.bin version 70.55.3 11.132091 xe 0000:c4:00.0: drm Finished loading DMC firmware i915/bmg dmc.bin v2.6 11.538272 xe 0000:c4:00.0: drm GT0: ccs2 fused off 11.538277 xe 0000:c4:00.0: drm GT0: ccs3 fused off 11.566086 xe 0000:c4:00.0: drm GT1: Using GuC firmware from xe/bmg guc 70.bin version 70.55.3 11.574804 xe 0000:c4:00.0: drm GT1: Using HuC firmware from xe/bmg huc.bin version 8.2.10 11.587116 xe 0000:c4:00.0: drm GT1: vcs1 fused off 11.587120 xe 0000:c4:00.0: drm GT1: vcs3 fused off 11.587123 xe 0000:c4:00.0: drm GT1: vcs4 fused off 11.587126 xe 0000:c4:00.0: drm GT1: vcs5 fused off 11.587128 xe 0000:c4:00.0: drm GT1: vcs6 fused off 11.587131 xe 0000:c4:00.0: drm GT1: vcs7 fused off 11.587134 xe 0000:c4:00.0: drm GT1: vecs2 fused off 11.587137 xe 0000:c4:00.0: drm GT1: vecs3 fused off 11.623751 xe 0000:c4:00.0: drm Registered 4 planes with drm panic 11.663881 xe 0000:c4:00.0: drm Cannot find any crtc or sizes 11.676439 xe 0000:c4:00.0: drm Using mailbox commands for power limits 11.676905 xe 0000:c4:00.0: drm PL2 is supported on channel 0 11.678699 xe 0000:83:00.0: drm Running in SR-IOV PF mode 11.678906 xe 0000:83:00.0: drm Found battlemage device ID e211 discrete display version 14.01 stepping B0 11.680582 xe 0000:83:00.0: drm VISIBLE VRAM: 0x000001e800000000, 0x0000000800000000 11.680700 xe 0000:83:00.0: drm VRAM 0 : Actual physical size 0x0000000540000000, usable size exclude stolen 0x000000053a600000, CPU accessible size 0x000000053a600000 11.680704 xe 0000:83:00.0: drm VRAM 0 : DPA range: 0x0000000000000000-540000000 , io range: 0x000001e800000000-1ed3a600000 11.680709 xe 0000:83:00.0: drm VRAM 0 : Actual physical size 0x0000000540000000, usable size exclude stolen 0x000000053a600000, CPU accessible size 0x000000053a600000 11.680712 xe 0000:83:00.0: drm VRAM 0 : DPA range: 0x0000000000000000-540000000 , io range: 0x000001e800000000-1ed3a600000 11.743874 xe 0000:c4:00.0: drm Cannot find any crtc or sizes 11.783868 xe 0000:c4:00.0: drm Cannot find any crtc or sizes 11.849326 xe 0000:83:00.0: drm Finished loading DMC firmware i915/bmg dmc.bin v2.6 11.851220 xe 0000:83:00.0: drm GT0: Using GuC firmware from xe/bmg guc 70.bin version 70.55.3 12.267897 xe 0000:83:00.0: drm GT0: ccs2 fused off 12.267903 xe 0000:83:00.0: drm GT0: ccs3 fused off 12.295326 xe 0000:83:00.0: drm GT1: Using GuC firmware from xe/bmg guc 70.bin version 70.55.3 12.298426 xe 0000:83:00.0: drm GT1: Using HuC firmware from xe/bmg huc.bin version 8.2.10 12.310724 xe 0000:83:00.0: drm GT1: vcs1 fused off 12.310729 xe 0000:83:00.0: drm GT1: vcs3 fused off 12.310732 xe 0000:83:00.0: drm GT1: vcs4 fused off 12.310735 xe 0000:83:00.0: drm GT1: vcs5 fused off 12.310737 xe 0000:83:00.0: drm GT1: vcs6 fused off 12.310740 xe 0000:83:00.0: drm GT1: vcs7 fused off 12.310742 xe 0000:83:00.0: drm GT1: vecs2 fused off 12.310745 xe 0000:83:00.0: drm GT1: vecs3 fused off 12.347087 xe 0000:83:00.0: drm Registered 4 planes with drm panic 12.426868 xe 0000:83:00.0: drm Cannot find any crtc or sizes 12.429864 xe 0000:83:00.0: drm Using mailbox commands for power limits 12.430327 xe 0000:83:00.0: drm PL2 is supported on channel 0 12.466870 xe 0000:83:00.0: drm Cannot find any crtc or sizes ========== FIRMWARE ========== COMMAND: dmesg | grep -Ei 'guc|huc|gsc' OUTPUT: 11.118986 xe 0000:c4:00.0: drm GT0: Using GuC firmware from xe/bmg guc 70.bin version 70.55.3 11.566086 xe 0000:c4:00.0: drm GT1: Using GuC firmware from xe/bmg guc 70.bin version 70.55.3 11.574804 xe 0000:c4:00.0: drm GT1: Using HuC firmware from xe/bmg huc.bin version 8.2.10 11.851220 xe 0000:83:00.0: drm GT0: Using GuC firmware from xe/bmg guc 70.bin version 70.55.3 12.295326 xe 0000:83:00.0: drm GT1: Using GuC firmware from xe/bmg guc 70.bin version 70.55.3 12.298426 xe 0000:83:00.0: drm GT1: Using HuC firmware from xe/bmg huc.bin version 8.2.10 12.486910 0x000000001000-0x00000054e000 : "xe.nvm.50176.GSC" 12.498589 0x000000001000-0x00000054e000 : "xe.nvm.33536.GSC" ========== DRM DEVICES ========== COMMAND: ls -l /dev/dri OUTPUT: total 0 drwxr-xr-x 2 root root 140 Mar 16 11:26 by-path crw-rw---- 1 root video 226, 0 Mar 16 11:26 card0 crw-rw---- 1 root video 226, 1 Mar 16 11:26 card1 crw-rw---- 1 root video 226, 2 Mar 16 11:26 card2 crw-rw---- 1 root render 226, 128 Mar 16 11:26 renderD128 crw-rw---- 1 root render 226, 129 Mar 16 11:26 renderD129 ========== IOMMU GROUPS ========== COMMAND: find /sys/kernel/iommu groups -type l | grep 83:00.0 OUTPUT: /sys/kernel/iommu groups/37/devices/0000:83:00.0 COMMAND: find /sys/kernel/iommu groups -type l | grep c4:00.0 OUTPUT: /sys/kernel/iommu groups/16/devices/0000:c4:00.0 ========== COMPLETE ========== Diagnostic output saved to gpu diag 20260316 121003.txt root@proxmox:~ anlin https://forum.level1techs.com/u/anlin 2 The gen1 x1 link status is a known quirk with Arc cards. The PCIe bridge upstream of the G21 device should show the actual link status 16 GT/s x8 would be expected in your case . Yeah, I figured out that I needed to load the cards into Intel Arc Pro Graphics on a Windows machine in order to update the firmware and disable the ECC reservation on the VRAM so that all of the capacity is usable. I have yet to figure out how to pass the whole GPU into a VM in Proxmox due to the weird bridge situation I couldn’t change the driver for the root port of the bridge from ‘pcieport’ to ‘vfio-pci’ so that it would be selectable as a PCI device , so I just created an LXC and it seems to be working fine for the time being Hmm. Is the passthrough situation weird? I didn’t have to change anything at all for my arc pro cards, it just worked. SR-IOV needs a tiny bit of fiddling but even that iirc is out of the box nearly. I was initially using an Ubuntu 25.04 VM and the xe driver wouldn’t bind to the devices that I passed through correctly. I just tried spinning up a new VM with a 25.10 image earlier today and everything worked fine in terms of llama.cpp using the GPU properly. BillM https://forum.level1techs.com/u/BillM 6 I have the same with a B50 Pro, the link state shows 2.5GT/s at PCIe x1: lspci -s b5:00.0 -vv b5:00.0 VGA compatible controller: Intel Corporation Battlemage G21 Intel Graphics prog-if 00 VGA controller Subsystem: Intel Corporation Device 1114 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast TAbort-