diff --git a/src/cpu/cpu_table.c b/src/cpu/cpu_table.c
index fc6429300..1086f3a56 100644
--- a/src/cpu/cpu_table.c
+++ b/src/cpu/cpu_table.c
@@ -7306,6 +7306,129 @@ const cpu_family_t cpu_families[] = {
                 .cache_write_cycles = 14,
                 .atclk_div          = 54
             },
+            /* Experimental bus grades for pushing past 450MHz on the P2.
+             * Crucially the 350-450 MHz timing pattern is maintained, so
+             * 90 ns memory and 30 ns cache accesses, rounded to the
+             * nearest CPU cycle (halves up), same 8.33 MHz AT clock though!
+             * Super experimental <3 nyaa.sh */
+            { /* out of spec */
+                .name               = "500",
+                .cpu_type           = CPU_PENTIUM2D,
+                .fpus               = fpus_internal,
+                .rspeed             = 500000000,
+                .multi              = 5.0,
+                .voltage            = 2050,
+                .edx_reset          = 0x652,
+                .cpuid_model        = 0x652,
+                .cyrix_id           = 0,
+                .cpu_flags          = CPU_SUPPORTS_DYNAREC | CPU_REQUIRES_DYNAREC,
+                .mem_read_cycles    = 45,
+                .mem_write_cycles   = 45,
+                .cache_read_cycles  = 15,
+                .cache_write_cycles = 15,
+                .atclk_div          = 60
+            },
+            { /* out of spec */
+                .name               = "550",
+                .cpu_type           = CPU_PENTIUM2D,
+                .fpus               = fpus_internal,
+                .rspeed             = 550000000,
+                .multi              = 5.5,
+                .voltage            = 2050,
+                .edx_reset          = 0x652,
+                .cpuid_model        = 0x652,
+                .cyrix_id           = 0,
+                .cpu_flags          = CPU_SUPPORTS_DYNAREC | CPU_REQUIRES_DYNAREC,
+                .mem_read_cycles    = 50,
+                .mem_write_cycles   = 50,
+                .cache_read_cycles  = 17,
+                .cache_write_cycles = 17,
+                .atclk_div          = 66
+            },
+            { /* out of spec */
+                .name               = "600",
+                .cpu_type           = CPU_PENTIUM2D,
+                .fpus               = fpus_internal,
+                .rspeed             = 600000000,
+                .multi              = 6.0,
+                .voltage            = 2050,
+                .edx_reset          = 0x652,
+                .cpuid_model        = 0x652,
+                .cyrix_id           = 0,
+                .cpu_flags          = CPU_SUPPORTS_DYNAREC | CPU_REQUIRES_DYNAREC,
+                .mem_read_cycles    = 54,
+                .mem_write_cycles   = 54,
+                .cache_read_cycles  = 18,
+                .cache_write_cycles = 18,
+                .atclk_div          = 72
+            },
+            { /* out of spec */
+                .name               = "650",
+                .cpu_type           = CPU_PENTIUM2D,
+                .fpus               = fpus_internal,
+                .rspeed             = 650000000,
+                .multi              = 6.5,
+                .voltage            = 2050,
+                .edx_reset          = 0x652,
+                .cpuid_model        = 0x652,
+                .cyrix_id           = 0,
+                .cpu_flags          = CPU_SUPPORTS_DYNAREC | CPU_REQUIRES_DYNAREC,
+                .mem_read_cycles    = 59,
+                .mem_write_cycles   = 59,
+                .cache_read_cycles  = 20,
+                .cache_write_cycles = 20,
+                .atclk_div          = 78
+            },
+            { /* out of spec */
+                .name               = "700",
+                .cpu_type           = CPU_PENTIUM2D,
+                .fpus               = fpus_internal,
+                .rspeed             = 700000000,
+                .multi              = 7.0,
+                .voltage            = 2050,
+                .edx_reset          = 0x652,
+                .cpuid_model        = 0x652,
+                .cyrix_id           = 0,
+                .cpu_flags          = CPU_SUPPORTS_DYNAREC | CPU_REQUIRES_DYNAREC,
+                .mem_read_cycles    = 63,
+                .mem_write_cycles   = 63,
+                .cache_read_cycles  = 21,
+                .cache_write_cycles = 21,
+                .atclk_div          = 84
+            },
+            { /* out of spec */
+                .name               = "750",
+                .cpu_type           = CPU_PENTIUM2D,
+                .fpus               = fpus_internal,
+                .rspeed             = 750000000,
+                .multi              = 7.5,
+                .voltage            = 2050,
+                .edx_reset          = 0x652,
+                .cpuid_model        = 0x652,
+                .cyrix_id           = 0,
+                .cpu_flags          = CPU_SUPPORTS_DYNAREC | CPU_REQUIRES_DYNAREC,
+                .mem_read_cycles    = 68,
+                .mem_write_cycles   = 68,
+                .cache_read_cycles  = 23,
+                .cache_write_cycles = 23,
+                .atclk_div          = 90
+            },
+            { /* out of spec */
+                .name               = "800",
+                .cpu_type           = CPU_PENTIUM2D,
+                .fpus               = fpus_internal,
+                .rspeed             = 800000000,
+                .multi              = 8.0,
+                .voltage            = 2050,
+                .edx_reset          = 0x652,
+                .cpuid_model        = 0x652,
+                .cyrix_id           = 0,
+                .cpu_flags          = CPU_SUPPORTS_DYNAREC | CPU_REQUIRES_DYNAREC,
+                .mem_read_cycles    = 72,
+                .mem_write_cycles   = 72,
+                .cache_read_cycles  = 24,
+                .cache_write_cycles = 24,
+                .atclk_div          = 96
+            },
             { .name = "", 0 }
         }
     },