diff --git a/platformio.ini b/platformio.ini
index 441c6315..7c5b02a6 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -2476,11 +2476,16 @@ lib_ignore =
 
 
 [env:adafruit_matrixportal_esp32s3]
+; ESP32-S3 processor, 8 MB flash, 2 MB of PSRAM, dedicated driver pins for HUB75
 extends = esp32_4MB_V4_M_base
 platform = ${esp32.platformV4_xp} ;; 6.5.0 = first platform release supporting matrixportal
 platform_packages = ${esp32.platformV4_packages_xp} ;; arduino-esp32 2.0.14 needed - previous versions were missing files for matrixportal
 board = adafruit_matrixportal_esp32s3
 
+board_build.partitions = ${esp32.large_partitions}
+board_build.f_flash = 80000000L
+board_build.flash_mode = qio
+
 build_unflags = ${env:esp32S3_8MB_M.build_unflags}   ;; use the same as "normal" S3 buildenv
 build_flags = ${common.build_flags} ${esp32s3.build_flags} -Wno-misleading-indentation -Wno-format-truncation
   ${common_mm.build_flags_S}