diff --git a/HISTORY.rst b/HISTORY.rst
index 579c1e7074..b35a87441e 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -20,12 +20,12 @@ test-driven methodologies, and modern toolchains for unrivaled success.
 6.1.12 (2023-??-??)
 ~~~~~~~~~~~~~~~~~~~
 
+* Introduced a warning during the verification of MCU maximum RAM usage, signaling when the allocated RAM surpasses 100% (`issue #4791 <https://github.com/platformio/platformio-core/issues/4791>`_)
 * Drastically enhanced the speed of project building when operating in verbose mode (`issue #4783 <https://github.com/platformio/platformio-core/issues/4783>`_)
 * Resolved an issue where the ``COMPILATIONDB_INCLUDE_TOOLCHAIN`` setting was not correctly applying to private libraries (`issue #4762 <https://github.com/platformio/platformio-core/issues/4762>`_)
 * Resolved an issue where ``get_systype()`` inaccurately returned the architecture when executed within a Docker container on a 64-bit kernel with a 32-bit userspace (`issue #4777 <https://github.com/platformio/platformio-core/issues/4777>`_)
 * Resolved an issue with incorrect handling of the ``check_src_filters`` option when used in multiple environments (`issue #4788 <https://github.com/platformio/platformio-core/issues/4788>`_)
 
-
 6.1.11 (2023-08-31)
 ~~~~~~~~~~~~~~~~~~~
 
diff --git a/platformio/builder/tools/pioupload.py b/platformio/builder/tools/pioupload.py
index 77bf28d251..224d0b90f8 100644
--- a/platformio/builder/tools/pioupload.py
+++ b/platformio/builder/tools/pioupload.py
@@ -218,12 +218,11 @@ def _format_availale_bytes(value, total):
     if int(ARGUMENTS.get("PIOVERBOSE", 0)):
         print(output)
 
-    # raise error
-    # if data_max_size and data_size > data_max_size:
-    #     sys.stderr.write(
-    #         "Error: The data size (%d bytes) is greater "
-    #         "than maximum allowed (%s bytes)\n" % (data_size, data_max_size))
-    #     env.Exit(1)
+    if data_max_size and data_size > data_max_size:
+        sys.stderr.write(
+            "Warning! The data size (%d bytes) is greater "
+            "than maximum allowed (%s bytes)\n" % (data_size, data_max_size)
+        )
     if program_size > program_max_size:
         sys.stderr.write(
             "Error: The program size (%d bytes) is greater "