diff --git a/src/cpu/cpu_table.c b/src/cpu/cpu_table.c
index 120cc6a1e..5326c9d14 100644
--- a/src/cpu/cpu_table.c
+++ b/src/cpu/cpu_table.c
@@ -2508,7 +2508,7 @@ const cpu_family_t cpu_families[] = {
                 .fpus               = fpus_internal,
                 .rspeed             = 75000000,
                 .multi              = 3.0,
-                .voltage            = 3300,
+                .voltage            = 5000,
                 .edx_reset          = 0x480,
                 .cpuid_model        = 0x480,
                 .cyrix_id           = 0x0000,
@@ -2525,7 +2525,7 @@ const cpu_family_t cpu_families[] = {
                 .fpus               = fpus_internal,
                 .rspeed             = 100000000,
                 .multi              = 3.0,
-                .voltage            = 3300,
+                .voltage            = 5000,
                 .edx_reset          = 0x483,
                 .cpuid_model        = 0x483,
                 .cyrix_id           = 0x0000,
@@ -3066,7 +3066,7 @@ const cpu_family_t cpu_families[] = {
                 .fpus               = fpus_internal,
                 .rspeed             = 133333333,
                 .multi              = 4.0,
-                .voltage            = 3450,
+                .voltage            = 5000,
                 .edx_reset          = 0x4e0,
                 .cpuid_model        = 0x4e0,
                 .cyrix_id           = 0,
@@ -3083,7 +3083,7 @@ const cpu_family_t cpu_families[] = {
                 .fpus               = fpus_internal,
                 .rspeed             = 150000000,
                 .multi              = 3.0,
-                .voltage            = 3450,
+                .voltage            = 5000,
                 .edx_reset          = 0x482,
                 .cpuid_model        = 0x482,
                 .cyrix_id           = 0,
@@ -3100,7 +3100,7 @@ const cpu_family_t cpu_families[] = {
                 .fpus               = fpus_internal,
                 .rspeed             = 160000000,
                 .multi              = 4.0,
-                .voltage            = 3450,
+                .voltage            = 5000,
                 .edx_reset          = 0x4e0,
                 .cpuid_model        = 0x4e0,
                 .cyrix_id           = 0,
@@ -3332,7 +3332,7 @@ const cpu_family_t cpu_families[] = {
                 .fpus               = fpus_internal,
                 .rspeed             = 80000000,
                 .multi              = 2.0,
-                .voltage            = 3450,
+                .voltage            = 5000,
                 .edx_reset          = 0x480,
                 .cpuid_model        = 0,
                 .cyrix_id           = 0x002f,
@@ -3349,7 +3349,7 @@ const cpu_family_t cpu_families[] = {
                 .fpus               = fpus_internal,
                 .rspeed             = 100000000,
                 .multi              = 3.0,
-                .voltage            = 3450,
+                .voltage            = 5000,
                 .edx_reset          = 0x480,
                 .cpuid_model        = 0,
                 .cyrix_id           = 0x002f,
@@ -3366,7 +3366,7 @@ const cpu_family_t cpu_families[] = {
                 .fpus               = fpus_internal,
                 .rspeed             = 120000000,
                 .multi              = 3.0,
-                .voltage            = 3450,
+                .voltage            = 5000,
                 .edx_reset          = 0x480,
                 .cpuid_model        = 0,
                 .cyrix_id           = 0x002f,
@@ -3383,7 +3383,7 @@ const cpu_family_t cpu_families[] = {
                 .fpus               = fpus_internal,
                 .rspeed             = 133333333,
                 .multi              = 4.0,
-                .voltage            = 3450,
+                .voltage            = 5000,
                 .edx_reset          = 0x480,
                 .cpuid_model        = 0,
                 .cyrix_id           = 0x002f,
diff --git a/src/machine/machine_table.c b/src/machine/machine_table.c
index c0c0e9085..942c97541 100644
--- a/src/machine/machine_table.c
+++ b/src/machine/machine_table.c
@@ -5484,10 +5484,10 @@ const machine_t machines[] = {
         .cpu = {
             .package = CPU_PKG_386DX | CPU_PKG_SOCKET1,
             .block = CPU_BLOCK_NONE,
-            .min_bus = 25000000,
-            .max_bus = 66666667,
-            .min_voltage = 5000,
-            .max_voltage = 5000,
+            .min_bus = 0,
+            .max_bus = 0,
+            .min_voltage = 0,
+            .max_voltage = 0,
             .min_multi = 0,
             .max_multi = 0
         },
@@ -5524,10 +5524,10 @@ const machine_t machines[] = {
         .cpu = {
             .package = CPU_PKG_386DX | CPU_PKG_SOCKET1,
             .block = CPU_BLOCK_NONE,
-            .min_bus = 25000000,
-            .max_bus = 66666667,
-            .min_voltage = 5000,
-            .max_voltage = 5000,
+            .min_bus = 0,
+            .max_bus = 0,
+            .min_voltage = 0,
+            .max_voltage = 0,
             .min_multi = 0,
             .max_multi = 0
         },