diff -r ccc2118da290 -r 8a66aa3d7866 src/mem/ruby/system/System.hh
--- a/src/mem/ruby/system/System.hh	Wed Oct 03 23:06:21 2012 -0500
+++ b/src/mem/ruby/system/System.hh	Wed Oct 03 23:08:47 2012 -0500
@@ -152,12 +152,12 @@
     static int m_memory_size_bits;
 
     Network* m_network_ptr;
-    MemoryControl *m_memory_controller;
+    std::vector<MemoryControl *> m_memory_controller_vec;
+    std::vector<AbstractController *> m_abs_cntrl_vec;
 
   public:
     Profiler* m_profiler_ptr;
     MemoryVector* m_mem_vec_ptr;
-    std::vector<AbstractController*> m_abs_cntrl_vec;
     bool m_warmup_enabled;
     bool m_cooldown_enabled;
     CacheRecorder* m_cache_recorder;
diff -r ccc2118da290 -r 8a66aa3d7866 src/mem/ruby/system/System.cc
--- a/src/mem/ruby/system/System.cc	Wed Oct 03 23:06:21 2012 -0500
+++ b/src/mem/ruby/system/System.cc	Wed Oct 03 23:08:47 2012 -0500
@@ -119,7 +119,7 @@
 
 void
 RubySystem::registerMemController(MemoryControl *mc) {
-    m_memory_controller = mc;
+    m_memory_controller_vec.push_back(mc);
 }
 
 RubySystem::~RubySystem()
@@ -365,9 +365,13 @@
         delete m_cache_recorder;
         m_cache_recorder = NULL;
         m_warmup_enabled = false;
+
         // reset DRAM so that it's not waiting for events on the old event
         // queue
-        m_memory_controller->reset();
+        for (int i = 0; i < m_memory_controller_vec.size(); ++i) {
+            m_memory_controller_vec[i]->reset();
+        }
+
         // Restore eventq head
         eventq_head = eventq->replaceHead(eventq_head);
         // Restore curTick and Ruby System's clock