![Post error message with 2 x Grid K1 on Dell R720 + Sandy Bridge CPUs - OEM Resources - NVIDIA Developer Forums Post error message with 2 x Grid K1 on Dell R720 + Sandy Bridge CPUs - OEM Resources - NVIDIA Developer Forums](https://global.discourse-cdn.com/nvidia/original/3X/4/7/47cb15723f437578f5d2c1c3c39e159258818073.jpeg)
Post error message with 2 x Grid K1 on Dell R720 + Sandy Bridge CPUs - OEM Resources - NVIDIA Developer Forums
![this is a 64-bit bar mapped above 4gb by the system bios or linux kernalm but the pci bridge immediatly upstream of this GPU does not define a matching prefetchable memory window" this is a 64-bit bar mapped above 4gb by the system bios or linux kernalm but the pci bridge immediatly upstream of this GPU does not define a matching prefetchable memory window"](https://preview.redd.it/d06v079ksso71.png?width=721&format=png&auto=webp&s=1bce0d2935b5e85ef2569e297e52a1c33191a6e7)
this is a 64-bit bar mapped above 4gb by the system bios or linux kernalm but the pci bridge immediatly upstream of this GPU does not define a matching prefetchable memory window"
Non-prefetchable memory in 3rd memory mapped bar results in loop failure · Issue #344 · NVIDIA/open-gpu-kernel-modules · GitHub
![How to set PCIe Configuration Register ~ Prefetchable Memory Range - Semiconductor Business -Macnica How to set PCIe Configuration Register ~ Prefetchable Memory Range - Semiconductor Business -Macnica](https://www.macnica.co.jp/business/semiconductor/articles/prefe_mem_base.png)