diff --git a/cuckoo-miner/src/cuckoo_sys/plugins/CMakeLists.txt b/cuckoo-miner/src/cuckoo_sys/plugins/CMakeLists.txt
index c1b517d..e8cd1b2 100644
--- a/cuckoo-miner/src/cuckoo_sys/plugins/CMakeLists.txt
+++ b/cuckoo-miner/src/cuckoo_sys/plugins/CMakeLists.txt
@@ -162,9 +162,9 @@ build_cpu_target("${AR2_CPU_SRC}" cuckarood_cpu_avx2_29 "-mavx2 -DNSIPHASH=8 -DE
 
 ### AR CUDA TARGETS #########################################
 
-set (AR2_CUDA_SRC cuckoo/src/cuckarood/mean.cu ${BLAKE_2B} )
+set (AR2_CUDA_SRC cuckoo/src/cuckarood/photon.cu cuckoo/src/cuckarood/kernel.cu ${BLAKE_2B} )
 
 if (NOT SKIP_CUCKAROOD_GPU)
-  build_cuda_target("${AR2_CUDA_SRC}" cuckarood_cuda_19 "-DEPS_A=4 -DEPS_B=3 -DIDXSHIFT=2 -DEDGEBITS=19")
+  build_cuda_target("${AR2_CUDA_SRC}" cuckarood_cuda_19 "-DXBITS=1 -DEPS_A=4 -DEPS_B=3 -DIDXSHIFT=8 -DEDGEBITS=19")
   build_cuda_target("${AR2_CUDA_SRC}" cuckarood_cuda_29 "-DEDGEBITS=29")
 endif()
diff --git a/cuckoo-miner/src/cuckoo_sys/plugins/cuckoo b/cuckoo-miner/src/cuckoo_sys/plugins/cuckoo
index a69183d..fdbb59c 160000
--- a/cuckoo-miner/src/cuckoo_sys/plugins/cuckoo
+++ b/cuckoo-miner/src/cuckoo_sys/plugins/cuckoo
@@ -1 +1 @@
-Subproject commit a69183d6bcf192c303b9a64e2fbd17cf9094a90e
+Subproject commit fdbb59c508cdb1ad822c6c0c277e0468a30fd096
diff --git a/grin-miner.toml b/grin-miner.toml
index 69ca55b..5f88d0d 100644
--- a/grin-miner.toml
+++ b/grin-miner.toml
@@ -101,20 +101,16 @@ nthreads = 4
 # instance of each plugin.  device 0 is used by default
 #
 
-# currently requires 5.5GB+ GPU memory
+# currently requires 5GB GPU memory
 #[[mining.miner_plugin_config]]
 #plugin_name = "cuckarood_cuda_29"
 #[mining.miner_plugin_config.parameters]
 #device = 0
 #cpuload = 1
-#ntrims = 176
-#genablocks = 4096
-#genatpb = 128
-#genbtpb = 128
-#trimtpb = 512
-#tailtpb = 1024
-#recoverblocks = 1024
-#recovertpb = 1024
+#ntrims = 458
+#genablocks = 1024
+#recoverblocks = 2048
+#recovertpb = 256
 
 # e.g. To enable multiple devices (copy params from above as needed)