diff --git a/Source/Core/Core/AchievementManager.cpp b/Source/Core/Core/AchievementManager.cpp
index 29219cb747..35cbe24d54 100644
--- a/Source/Core/Core/AchievementManager.cpp
+++ b/Source/Core/Core/AchievementManager.cpp
@@ -329,10 +329,11 @@ void AchievementManager::DoFrame()
       if (!system)
         return;
       Core::CPUThreadGuard thread_guard(*system);
-      u32 ram_size = system->GetMemory().GetRamSizeReal();
-      if (m_cloned_memory.size() != ram_size)
-        m_cloned_memory.resize(ram_size);
-      system->GetMemory().CopyFromEmu(m_cloned_memory.data(), 0, m_cloned_memory.size());
+      u32 mem2_size = system->GetMemory().GetExRamSizeReal();
+      if (m_cloned_memory.size() != MEM1_SIZE + mem2_size)
+        m_cloned_memory.resize(MEM1_SIZE + mem2_size);
+      system->GetMemory().CopyFromEmu(m_cloned_memory.data(), 0, MEM1_SIZE);
+      system->GetMemory().CopyFromEmu(m_cloned_memory.data() + MEM1_SIZE, MEM2_START, mem2_size);
     }
 #endif  // RC_CLIENT_SUPPORTS_RAINTEGRATION
     std::lock_guard lg{m_lock};
@@ -1316,10 +1317,10 @@ void AchievementManager::Request(const rc_api_request_t* request,
 u32 AchievementManager::MemoryVerifier(u32 address, u8* buffer, u32 num_bytes, rc_client_t* client)
 {
   auto& system = Core::System::GetInstance();
-  u32 ram_size = system.GetMemory().GetRamSizeReal();
-  if (address >= ram_size)
-    return 0;
-  return std::min(ram_size - address, num_bytes);
+  u32 mem2_size = system.GetMemory().GetExRamSizeReal();
+  if (address < MEM1_SIZE + mem2_size)
+    return std::min(MEM1_SIZE + mem2_size - address, num_bytes);
+  return 0;
 }
 
 u32 AchievementManager::MemoryPeeker(u32 address, u8* buffer, u32 num_bytes, rc_client_t* client)
@@ -1350,6 +1351,8 @@ u32 AchievementManager::MemoryPeeker(u32 address, u8* buffer, u32 num_bytes, rc_
     return 0;
   }
   Core::CPUThreadGuard thread_guard(system);
+  if (address > MEM1_SIZE)
+    address += (MEM2_START - MEM1_SIZE);
   for (u32 num_read = 0; num_read < num_bytes; num_read++)
   {
     auto value = system.GetMMU().HostTryReadU8(thread_guard, address + num_read,
@@ -1590,7 +1593,10 @@ void AchievementManager::MemoryPoker(u32 address, u8* buffer, u32 num_bytes, rc_
     return;
   Core::CPUThreadGuard thread_guard(*system);
   std::lock_guard lg{instance.m_memory_lock};
-  system->GetMemory().CopyToEmu(address, buffer, num_bytes);
+  if (address < MEM1_SIZE)
+    system->GetMemory().CopyToEmu(address, buffer, num_bytes);
+  else
+    system->GetMemory().CopyToEmu(address - MEM1_SIZE + MEM2_START, buffer, num_bytes);
   std::copy(buffer, buffer + num_bytes, instance.m_cloned_memory.begin() + address);
 }
 void AchievementManager::GameTitleEstimateHandler(char* buffer, u32 buffer_size,
diff --git a/Source/Core/Core/AchievementManager.h b/Source/Core/Core/AchievementManager.h
index 9aa2caed75..90f406772c 100644
--- a/Source/Core/Core/AchievementManager.h
+++ b/Source/Core/Core/AchievementManager.h
@@ -76,6 +76,9 @@ public:
   using RichPresence = std::array<char, RP_SIZE>;
   using Badge = VideoCommon::CustomTextureData::ArraySlice::Level;
   static constexpr size_t MAX_DISPLAYED_LBOARDS = 4;
+  // This is hardcoded to 24MiB because rcheevos currently hardcodes it to 24MiB.
+  static constexpr u32 MEM1_SIZE = 0x01800000;
+  static constexpr u32 MEM2_START = 0x10000000;
 
   static constexpr std::string_view DEFAULT_PLAYER_BADGE_FILENAME = "achievements_player.png";
   static constexpr std::string_view DEFAULT_GAME_BADGE_FILENAME = "achievements_game.png";