diff --git a/src/main/scala/unleashed/u500ml507devkit/Config.scala b/src/main/scala/unleashed/u500ml507devkit/Config.scala
index ffce8bc..b68b89d 100644
--- a/src/main/scala/unleashed/u500ml507devkit/Config.scala
+++ b/src/main/scala/unleashed/u500ml507devkit/Config.scala
@@ -45,10 +45,10 @@ class U500ML507DevKitConfig extends Config(
   new U500ML507DevKitPeripherals ++
   new FreedomUML507Config().alter((site,here,up) => {
     case ErrorParams => ErrorParams(Seq(AddressSet(0x3000, 0xfff)), maxAtomic=site(XLen)/8, maxTransfer=128)
-    case PeripheryBusKey => up(PeripheryBusKey, site).copy(frequency = 50000000) // 50 MHz hperiphery
+    case PeripheryBusKey => up(PeripheryBusKey, site).copy(frequency = 60000000) // 60 MHz clock
     case MemoryML507Key => XilinxML507MIGParams(address = Seq(AddressSet(0x80000000L,0x10000000L-1))) // 256 MiB
     case DTSTimebase => BigInt(1000000)
-    case ExtMem => up(ExtMem).copy(size = 0x40000000L)
+    case ExtMem => up(ExtMem).copy(size = 0x10000000L)
     case JtagDTMKey => new JtagDTMConfig (
       idcodeVersion = 2,      // 1 was legacy (FE310-G000, Acai).
       idcodePartNum = 0x000,  // Decided to simplify.