diff --git a/saturn-vectors b/saturn-vectors
index f716212..4956f75 160000
--- a/saturn-vectors
+++ b/saturn-vectors
@@ -1 +1 @@
-Subproject commit f7162129179a22e49f1f6b7781d311fbfa563ce6
+Subproject commit 4956f75a04e9740df3edea1857fdc9960501d26a
diff --git a/src/Iris.scala b/src/Iris.scala
index 73ef937..444b6bf 100644
--- a/src/Iris.scala
+++ b/src/Iris.scala
@@ -456,11 +456,11 @@ class IrisConfig(sim: Boolean = false)
         // ==================================
         // new shuttle.common.WithAsynchronousShuttleTiles(3, 3, location=InCluster(0)) ++ // Add async crossings between RocketTile and uncore
         new saturn.shuttle.WithShuttleVectorUnit(
-          512,
           256,
-          VectorParams.opuParams
+          128,
+          VectorParams.opuMxParams
         ) ++
-        new shuttle.common.WithShuttleTileBeatBytes(32) ++
+        new shuttle.common.WithShuttleTileBeatBytes(16) ++
         new shuttle.common.WithTCM(size = 128L << 10, banks = 2) ++
         new shuttle.common.WithShuttleTileBoundaryBuffers() ++
         // ICache