diff --git a/Algo256/blake2s.cu b/Algo256/blake2s.cu
index bb9c85e..41a2f06 100644
--- a/Algo256/blake2s.cu
+++ b/Algo256/blake2s.cu
@@ -440,7 +440,7 @@ extern "C" int scanhash_blake2s(int thr_id, struct work *work, uint32_t max_nonc
 
 	const int dev_id = device_map[thr_id];
 	int rc = 0;
-	int intensity = 28;
+	int intensity = is_windows() ? 25 : 28;
 	uint32_t throughput = cuda_default_throughput(thr_id, 1U << intensity);
 	if (init[thr_id]) throughput = min(throughput, max_nonce - first_nonce);
 
diff --git a/lyra2/lyra2REv2.cu b/lyra2/lyra2REv2.cu
index 1917651..c148372 100644
--- a/lyra2/lyra2REv2.cu
+++ b/lyra2/lyra2REv2.cu
@@ -97,6 +97,7 @@ extern "C" int scanhash_lyra2v2(int thr_id, struct work* work, uint32_t max_nonc
 	const uint32_t first_nonce = pdata[19];
 	int dev_id = device_map[thr_id];
 	int intensity = (device_sm[dev_id] < 500) ? 18 : is_windows() ? 19 : 20;
+	if (strstr(device_name[dev_id], "GTX 10")) intensity = 20;
 	uint32_t throughput = cuda_default_throughput(dev_id, 1UL << intensity);
 	if (init[thr_id]) throughput = min(throughput, max_nonce - first_nonce);