From c64b12c0b80bc5a60ff39c7f984d06020009400c Mon Sep 17 00:00:00 2001
From: Patrick Mours <pmours@nvidia.com>
Date: Fri, 24 Jul 2020 15:36:09 +0200
Subject: [PATCH] Fix OptiX being shown as available on first generation
 Maxwell GPUs

The OptiX kernels are compiled for target "compute_sm_52", which is only available on second
generation Maxwell GPUs, so disable support for older ones.
---
 intern/cycles/device/device_optix.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/intern/cycles/device/device_optix.cpp b/intern/cycles/device/device_optix.cpp
index 1cc45983565..ca10cee76ad 100644
--- a/intern/cycles/device/device_optix.cpp
+++ b/intern/cycles/device/device_optix.cpp
@@ -1746,10 +1746,11 @@ void device_optix_info(const vector<DeviceInfo> &cuda_devices, vector<DeviceInfo
   for (DeviceInfo info : cuda_devices) {
     assert(info.type == DEVICE_CUDA);
 
-    int major;
+    int major, minor;
     cuDeviceGetAttribute(&major, CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MAJOR, info.num);
-    if (major < 5) {
-      continue;  // Only Maxwell and up are supported by OptiX
+    cuDeviceGetAttribute(&minor, CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MINOR, info.num);
+    if (major < 5 || (major == 5 && minor < 2)) {
+      continue;  // Only Maxwell 2.0 and up are supported by OptiX
     }
 
     info.type = DEVICE_OPTIX;