diff --git a/opencl/init.go b/opencl/init.go
index 4b8a945..59f05fd 100644
--- a/opencl/init.go
+++ b/opencl/init.go
@@ -226,6 +226,7 @@ func Init(gpu int) {
 	ClMaxWGNum = ClCUnits
 	ClTotalPE = ClWGSize[2] * ClCUnits
 	if GPUVend == 1 { // Nvidia
+		ClTotalPE *= 2
 		if ClMaxWGSize > ClTotalPE {
 			ClMaxWGNum = 1
 			ClMaxWGSize = ClTotalPE
diff --git a/opencl64/init.go b/opencl64/init.go
index a42d18a..2ba2e88 100644
--- a/opencl64/init.go
+++ b/opencl64/init.go
@@ -229,6 +229,7 @@ func Init(gpu int) {
 	ClMaxWGNum = ClCUnits
 	ClTotalPE = ClWGSize[2] * ClCUnits
 	if GPUVend == 1 { // Nvidia
+		ClTotalPE *= 2
 		if ClMaxWGSize > ClTotalPE {
 			ClMaxWGNum = 1
 			ClMaxWGSize = ClTotalPE