diff --git a/.github/configs/amd-master.yaml b/.github/configs/amd-master.yaml
index 5bc61f53a..61be1c8e2 100644
--- a/.github/configs/amd-master.yaml
+++ b/.github/configs/amd-master.yaml
@@ -777,25 +777,24 @@ gptoss-fp4-mi355x-vllm:
       - { tp: 8, conc-start: 4, conc-end: 8 }
 
 gptoss-fp4-mi355x-atom:
-  image: rocm/atom:rocm7.1.1-ubuntu24.04-pytorch2.9-atom0.1.1-MI350x
+  image: rocm/atom:rocm7.2.2_ubuntu24.04_py3.12_pytorch_release_2.10.0_atom0.1.2.post
   model: openai/gpt-oss-120b
   model-prefix: gptoss
   runner: mi355x
   precision: fp4
   framework: atom
   multinode: false
-  scenarios:
-    fixed-seq-len:
-    - isl: 1024
-      osl: 1024
-      search-space:
-      - { tp: 1, conc-start: 16, conc-end: 128 }
-      - { tp: 8, ep: 1, conc-start: 4, conc-end: 32 }
-    - isl: 8192
-      osl: 1024
-      search-space:
-      - { tp: 1, conc-start: 4, conc-end: 128 }
-      - { tp: 8, ep: 1, conc-start: 4, conc-end: 16 }
+  seq-len-configs:
+  - isl: 1024
+    osl: 1024
+    search-space:
+    - { tp: 1, conc-start: 16, conc-end: 256 }
+    - { tp: 8, ep: 1, conc-start: 4, conc-end: 32 }
+  - isl: 8192
+    osl: 1024
+    search-space:
+    - { tp: 1, conc-start: 4, conc-end: 256 }
+    - { tp: 8, ep: 1, conc-start: 4, conc-end: 16 }
 
 dsr1-fp8-mi355x-atom:
   image: rocm/atom:rocm7.1.1-ubuntu24.04-pytorch2.9-atom0.1.1-MI350x
diff --git a/benchmarks/single_node/gptoss_fp4_mi355x_atom.sh b/benchmarks/single_node/gptoss_fp4_mi355x_atom.sh
index 76bc87c0c..ee0810e8f 100644
--- a/benchmarks/single_node/gptoss_fp4_mi355x_atom.sh
+++ b/benchmarks/single_node/gptoss_fp4_mi355x_atom.sh
@@ -44,6 +44,7 @@ fi
 
 # Start GPU monitoring (power, temperature, clocks every second)
 start_gpu_monitor
+MEM_FRAC_STATIC=0.9
 
 set -x
 
@@ -54,6 +55,7 @@ python3 -m atom.entrypoints.openai_server \
     --server-port $PORT \
     -tp $TP \
     --kv_cache_dtype fp8 $CALCULATED_MAX_MODEL_LEN $EP \
+    --gpu-memory-utilization $MEM_FRAC_STATIC \
     --block-size $BLOCK_SIZE > $SERVER_LOG 2>&1 &
 
 SERVER_PID=$!
diff --git a/perf-changelog.yaml b/perf-changelog.yaml
index 647ec35f9..f50347c65 100644
--- a/perf-changelog.yaml
+++ b/perf-changelog.yaml
@@ -1902,6 +1902,12 @@
     - "Pass --dsv4 to run_benchmark_serving so MTP benchmarks use the DSv4 chat template (PR #1153)"
   pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/1182
 
+- config-keys:
+    - gptoss-fp4-mi355x-atom
+  description:
+    - "Update GPTOSS-120B FP4 MI355X Atom benchmark (rocm/atom:rocm7.2.2_ubuntu24.04_py3.12_pytorch_release_2.10.0_atom0.1.2.post)"
+  pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/1195
+  
 - config-keys:
     - dsv4-fp4-b300-vllm
   description: