diff --git a/product/board/cel_nuc.cfg b/product/board/cel_nuc.cfg
index db1c1d46..3b13cd45 100644
--- a/product/board/cel_nuc.cfg
+++ b/product/board/cel_nuc.cfg
@@ -1,7 +1,7 @@
 # basic info
 EVMM_CMPL_FLAGS += \
- -DMAX_CPU_NUM=8 \
- -DTOP_OF_MEM=0x800000000 \
+ -DMAX_CPU_NUM=256 \
+ -DTOP_OF_MEM=0xFFFF00000000 \
  -DTSC_PER_MS=2200000 \
  -DLIB_MP_INIT \
  -DLIB_EFI_SERVICES \
diff --git a/product/celadon_64.cfg b/product/celadon_64.cfg
index 8344298b..11c9442b 100644
--- a/product/celadon_64.cfg
+++ b/product/celadon_64.cfg
@@ -17,7 +17,7 @@ EVMM_CMPL_FLAGS += \
  -DPACK_LK \
  -DMODULE_ACPI \
  -DMODULE_VTD \
- -DDMAR_MAX_ENGINE=4 \
+ -DDMAR_MAX_ENGINE=16 \
  -DSKIP_DMAR_GPU
 
 EVMM_CMPL_FLAGS += \