diff --git a/main.py b/main.py
index 48c7f11..fcfa5da 100644
--- a/main.py
+++ b/main.py
@@ -19,8 +19,11 @@ MAIL_MESSAGE = '''
 Hi, {}<br>
 <br>
 提醒您，您目前{}，<br>
-依照 CMLab 規定，每人在 CML workstation 上至多使用 2 顆 GPU <br>
+依照 CMLab 規定，每人在 CML workstation 使用的 GPU 之上限 VRAM 的總和不得超過 50GB<br>
+詳細請參考 <a href='https://www.cmlab.csie.ntu.edu.tw/wiki/doku.php?id=workstation:rule#rule_1_%E5%9F%BA%E6%9C%AC%E8%A6%8F%E5%89%87'>wiki 工作站規定</a>
 <br>
+<br>
+
 為了公平起見，建議您降低 GPU 使用量！<br>
 雖然我們不會直接處理，但若有人檢舉，我們會停止您運行的程式！<br>
 若有其他特殊需求請來信說明！謝謝您的配合！<br>
@@ -84,7 +87,7 @@ def get_server_gpu_status() -> list:
         server = soup.find('span', class_='f7')
         if server:
             server_name = server.text.replace(' ', '')
-            gpu_names = []
+            gpu_infos = []
 
             users = []
             gpus = box.split('\n')
@@ -92,6 +95,9 @@ def get_server_gpu_status() -> list:
                 if 'f6' in i:           # if this line is for a single GPU informations
                     soup = BeautifulSoup(i, 'html.parser')
 
+                    # get max VRAM MB number
+                    max_VRAM = int(soup.findAll('span', class_='f3')[1].text)
+
                     # get all users who is using this server's GPU resources.
                     user_objs = soup.findAll('span', class_='f0')
                     user_in_this_gpu = set()
@@ -105,15 +111,16 @@ def get_server_gpu_status() -> list:
 
                     # get gpu names
                     gpu_name = soup.find('span', class_='f4').text.replace(' ', '')
+                    print(gpu_name, max_VRAM)
 
                     # log gpu name & users on this GPU
-                    gpu_names.append(gpu_name)
+                    gpu_infos.append({'name': gpu_name, 'vram': max_VRAM})
                     users.append(list(user_in_this_gpu))
 
             servers.append({
                 'name': server_name,
                 'users': users,
-                'gpus': gpu_names
+                'gpus': gpu_infos,
             })
     return servers
 
@@ -136,20 +143,25 @@ def filter(server_status: list, limit: int = 2) -> list:
 
     for server in server_status:
         print(server['name'])
-        for gpu_index, gpu_name in enumerate(server['gpus']):
-            print("    ", gpu_index, gpu_name, server['users'][gpu_index])
+        for gpu_index, gpu_info in enumerate(server['gpus']):
+            print("    ", gpu_index, gpu_info['name'], server['users'][gpu_index])
             for user in server['users'][gpu_index]:
                 if user not in usage:
-                    usage[user] = [{'server': server['name'], 'gpu': gpu_name}]
+                    usage[user] = [{'server': server['name'], 'gpu': gpu_info['name'], 'vram': gpu_info['vram']}]
                 else:
-                    usage[user].append({'server': server['name'], 'gpu': gpu_name})
+                    usage[user].append({'server': server['name'], 'gpu': gpu_info['name'], 'vram': gpu_info['vram']})
 
         print('-')
 
     violators = []
     for user, state in usage.items():
-        if len(state) > limit:
-            violators.append({'username': user, 'usage': state}) 
+        # if len(state) > limit:
+        #     violators.append({'username': user, 'usage': state}) 
+        vrams = 0
+        for i in state:
+            vrams += i['vram']
+        if vrams >= 50000:
+            violators.append({'username': user, 'usage': state})
             
     return violators
 
@@ -169,7 +181,9 @@ def mail_notify(violators: list) -> None:
     def get_usage_msg(usage: list) -> str:
         server_usage = {}
         ans = ""
+        vrams = 0
         for gpu in usage:
+            vrams += gpu['vram']
             if gpu['server'] not in server_usage:
                 server_usage[gpu['server']] = { gpu['gpu']: 1 }
             else:
@@ -181,7 +195,9 @@ def mail_notify(violators: list) -> None:
         for server, gpus in server_usage.items():
             for gpu, count in gpus.items():
                 ans += f"在 {server} 上使用 {gpu} * {count}, "
-        return ans[:-2]
+        ans = ans[:-2]
+        ans += f'，GPU VRAM 上限之總和為 {vrams} MB VRAM。'
+        return ans
 
     print(" ===== 寄送 ===== ")
 
@@ -208,7 +224,9 @@ def mail_notify(violators: list) -> None:
             status = mailer.send('unix_manager@cmlab.csie.ntu.edu.tw', f'{username}@cmlab.csie.ntu.edu.tw' if not DEBUG_MODE else 'snsd0805@cmlab.csie.ntu.edu.tw', \
                 f'[網管通知] 提醒您已經超過 CMLab GPU 使用限制！({username})', msg)
 
-            if status == {}:
+            print(status)
+
+            if status:
                 print(f'    {username}, 郵件傳送成功！')
             else:
                 print(f'    {username}, 郵件傳送失敗...')