diff --git a/bdk/usb/usb_t210.h b/bdk/usb/usb_t210.h
index 4d67c69..e677a5f 100644
--- a/bdk/usb/usb_t210.h
+++ b/bdk/usb/usb_t210.h
@@ -198,6 +198,7 @@ typedef struct _t210_usb2d_t
 #define XUSB_DEV_XHCI_ST                 0x34
 #define  XHCI_ST_RC                      BIT(0)
 #define  XHCI_ST_IP                      BIT(4)
+#define XUSB_DEV_XHCI_RT_IMOD            0x38
 #define XUSB_DEV_XHCI_PORTSC             0x3C
 #define  XHCI_PORTSC_PR                  BIT(4)
 #define  XHCI_PORTSC_PLS_MASK            (0xF << 5)
diff --git a/bdk/usb/xusbd.c b/bdk/usb/xusbd.c
index 5595d98..4beefcd 100644
--- a/bdk/usb/xusbd.c
+++ b/bdk/usb/xusbd.c
@@ -895,14 +895,11 @@ int xusb_device_init()
 	XUSB_DEV_DEV(XUSB_DEV_INTR_MASK) |= DEV_INTR_MASK_IP_INT_MASK;
 
 	// AHB USB performance cfg.
-	//TODO: Doesn't help..
-/*
 	AHB_GIZMO(AHB_GIZMO_AHB_MEM) |= AHB_MEM_DONT_SPLIT_AHB_WR | AHB_MEM_ENB_FAST_REARBITRATE;
 	AHB_GIZMO(AHB_GIZMO_USB3) |= AHB_GIZMO_IMMEDIATE;
 	AHB_GIZMO(AHB_ARBITRATION_PRIORITY_CTRL) = PRIORITY_CTRL_WEIGHT(7) | PRIORITY_SELECT_USB3;
 	AHB_GIZMO(AHB_AHB_MEM_PREFETCH_CFG1) =
 		MEM_PREFETCH_ENABLE | MEM_PREFETCH_USB3_MST_ID | MEM_PREFETCH_ADDR_BNDRY(12) | 0x1000; // Addr boundary 64KB, Inactivity 4096 cycles.
-*/
 
 	// Initialize context.
 	usbd_xotg = &usbd_xotg_controller_ctxt;
@@ -1771,6 +1768,13 @@ int xusb_device_enumerate(usb_gadget_type gadget)
 
 	usbd_xotg->gadget = gadget;
 
+	/*
+	 * Set interrupt moderation to 0us.
+	 * This is important because default value creates a 4.62ms latency.
+	 * Effectively hurting transfers by having 15% to 96% performance loss.
+	 */
+	XUSB_DEV_XHCI(XUSB_DEV_XHCI_RT_IMOD) = 0;
+
 	// Disable Wake events.
 	XUSB_PADCTL(XUSB_PADCTL_ELPG_PROGRAM_0) = 0;
 	XUSB_PADCTL(XUSB_PADCTL_ELPG_PROGRAM_1) = 0;