diff --git a/Utilities/sysinfo.cpp b/Utilities/sysinfo.cpp
index e94c9effe8..084593a238 100755
--- a/Utilities/sysinfo.cpp
+++ b/Utilities/sysinfo.cpp
@@ -131,13 +131,9 @@ std::string utils::get_system_info()
 
 	fmt::append(result, "%s | %d Threads | %.2f GiB RAM", brand, num_proc, mem_total / (1024.0f * 1024 * 1024));
 
-	if (!has_invariant_tsc())
+	if (const ullong tsc_freq = get_tsc_freq())
 	{
-		fmt::append(result, " | TSC: Bad");
-	}
-	else if (const ullong tsc_freq = get_tsc_freq())
-	{
-		fmt::append(result, " | TSC: %.02fGHz", tsc_freq / 1000000000.);
+		fmt::append(result, " | TSC: %.06fGHz", tsc_freq / 1000000000.);
 	}
 	else
 	{
@@ -167,7 +163,7 @@ std::string utils::get_system_info()
 	if (has_fma3() || has_fma4())
 	{
 		result += " | FMA";
-		
+
 		if (has_fma3() && has_fma4())
 		{
 			result += "3+4";
@@ -268,15 +264,67 @@ std::string utils::get_OS_version()
 
 ullong utils::get_tsc_freq()
 {
+	const ullong cal_tsc = []() -> ullong
+	{
+		if (!has_invariant_tsc())
+			return 0;
 #ifdef _WIN32
-	LARGE_INTEGER freq;
-	if (!QueryPerformanceFrequency(&freq) || freq.QuadPart > 9'999'999)
-		return 0;
-	return freq.QuadPart * 1024;
+		LARGE_INTEGER freq;
+		if (!QueryPerformanceFrequency(&freq))
+			return 0;
+
+		if (freq.QuadPart <= 9'999'999)
+			return freq.QuadPart * 1024;
+
+		const ullong timer_freq = freq.QuadPart;
+		Sleep(1);
 #else
-	// TODO
-	return 0;
+		const ullong timer_freq = 1'000'000'000;
+		ullong sec_base = 0;
+		usleep(200);
 #endif
+
+		// Calibrate TSC
+		constexpr int samples = 40;
+		ullong rdtsc_data[samples];
+		ullong timer_data[samples];
+		ullong rdtsc_diff[samples - 1];
+		ullong timer_diff[samples - 1];
+
+		for (int i = 0; i < samples; i++)
+		{
+			rdtsc_data[i] = __rdtsc();
+			if (i > 0)
+				rdtsc_diff[i - 1] = rdtsc_data[i] - rdtsc_data[i - 1];
+#ifdef _WIN32
+			LARGE_INTEGER ctr;
+			QueryPerformanceCounter(&ctr);
+			timer_data[i] = ctr.QuadPart;
+			Sleep(1);
+#else
+			struct timespec ts;
+			clock_gettime(CLOCK_MONOTONIC, &ts);
+			if (i == 0)
+				sec_base = ts.tv_sec;
+			timer_data[i] = ts.tv_nsec + (ts.tv_sec - sec_base) * 1'000'000'000;
+			usleep(200);
+#endif
+			if (i > 0)
+				timer_diff[i - 1] = timer_data[i] - timer_data[i - 1];
+		}
+
+		// Compute average TSC
+		ullong acc = 0;
+		for (int i = 0; i < samples - 1; i++)
+		{
+			acc += rdtsc_diff[i] * timer_freq / timer_diff[i];
+		}
+
+		// Rounding
+		return acc / (samples - 1);
+	}();
+
+	return cal_tsc;
 }
 
 u64 utils::get_total_memory()