diff --git a/src/x86/cpuid.c b/src/x86/cpuid.c
index bbbcbac..7bce0b4 100644
--- a/src/x86/cpuid.c
+++ b/src/x86/cpuid.c
@@ -223,9 +223,10 @@ int64_t get_peak_performance(struct cpuInfo* cpu, bool accurate_pp) {
     if(feat->FMA3 || feat->FMA4)
       flops = flops*2;
 
-    // Ice Lake has AVX512, but it has 1 VPU for AVX512, while
-    // it has 2 for AVX2. If this is a Ice Lake CPU, we are computing
-    // the peak performance supposing AVX2, not AVX512
+    // NOTE:
+    // Some CPUs (Ice Lake, Zen 4) have AVX512, but they have only
+    // 1 VPU for AVX512, while they have 2 for AVX2. In such cases,
+    // we are computing the peak performance supposing AVX2, not AVX512
     if(feat->AVX512 && vpus_are_AVX512(ptr))
       flops = flops*16;
     else if(feat->AVX || feat->AVX2)
diff --git a/src/x86/uarch.c b/src/x86/uarch.c
index 700abc4..1ce447d 100644
--- a/src/x86/uarch.c
+++ b/src/x86/uarch.c
@@ -414,7 +414,9 @@ struct uarch* get_uarch_from_cpuid(struct cpuInfo* cpu, uint32_t dump, uint32_t
 }
 
 bool vpus_are_AVX512(struct cpuInfo* cpu) {
-  return cpu->arch->uarch != UARCH_ICE_LAKE && cpu->arch->uarch != UARCH_TIGER_LAKE;
+  return cpu->arch->uarch != UARCH_ICE_LAKE &&
+         cpu->arch->uarch != UARCH_TIGER_LAKE &&
+         cpu->arch->uarch != UARCH_ZEN4;
 }
 
 bool is_knights_landing(struct cpuInfo* cpu) {