diff --git a/wled00/bus_manager.cpp b/wled00/bus_manager.cpp
index 37427305a7..72c280f10c 100644
--- a/wled00/bus_manager.cpp
+++ b/wled00/bus_manager.cpp
@@ -879,6 +879,11 @@ BusHub75Matrix::BusHub75Matrix(const BusConfig &bc) : Bus(bc.type, bc.start, bc.
     else if (mxconfig.chain_length * mxconfig.mx_width > 64)  mxconfig.setPixelColorDepthBits(4);
     else mxconfig.setPixelColorDepthBits(8);
   } else mxconfig.setPixelColorDepthBits(8);
+#else
+  if (physicalPanelWidth * physicalPanelHeight * mxconfig.chain_length > 192*64)
+    mxconfig.setPixelColorDepthBits(6); // reduce RAM usage for large panels, for the price of reduced color quality (18bit)
+  else
+    mxconfig.setPixelColorDepthBits(8); // default color resolution = 24bit
 #endif
 
 
@@ -1009,7 +1014,7 @@ BusHub75Matrix::BusHub75Matrix(const BusConfig &bc) : Bus(bc.type, bc.start, bc.
     DEBUGBUS_PRINTF("MatrixPanel_I2S_DMA = unsupported color order %u\n", bc.colorOrder);
   }
 
-  DEBUGBUS_PRINTF("MatrixPanel_I2S_DMA config - %ux%u length: %u\n", mxconfig.mx_width, mxconfig.mx_height, mxconfig.chain_length);
+  DEBUGBUS_PRINTF("MatrixPanel_I2S_DMA config - %ux%u length: %u, %d bits per pixel.\n", mxconfig.mx_width, mxconfig.mx_height, mxconfig.chain_length, 3 * mxconfig.getPixelColorDepthBits());
   DEBUGBUS_PRINTF("R1_PIN=%u, G1_PIN=%u, B1_PIN=%u, R2_PIN=%u, G2_PIN=%u, B2_PIN=%u, A_PIN=%u, B_PIN=%u, C_PIN=%u, D_PIN=%u, E_PIN=%u, LAT_PIN=%u, OE_PIN=%u, CLK_PIN=%u\n",
                 mxconfig.gpio.r1, mxconfig.gpio.g1, mxconfig.gpio.b1, mxconfig.gpio.r2, mxconfig.gpio.g2, mxconfig.gpio.b2,
                 mxconfig.gpio.a, mxconfig.gpio.b, mxconfig.gpio.c, mxconfig.gpio.d, mxconfig.gpio.e, mxconfig.gpio.lat, mxconfig.gpio.oe, mxconfig.gpio.clk);
@@ -1025,7 +1030,7 @@ BusHub75Matrix::BusHub75Matrix(const BusConfig &bc) : Bus(bc.type, bc.start, bc.
   this->_len = (display->width() * display->height()); // note: this returns correct number of pixels but incorrect dimensions if using virtual display (updated below)
 
   DEBUGBUS_PRINTF("Length: %u\n", _len);
-  if (this->_len >= MAX_LEDS) {
+  if (this->_len > MAX_LEDS) {
     DEBUGBUS_PRINTLN("MatrixPanel_I2S_DMA Too many LEDS - playing safe");
     return;
   }
diff --git a/wled00/cfg.cpp b/wled00/cfg.cpp
index 47bb81ab87..bfb6242883 100644
--- a/wled00/cfg.cpp
+++ b/wled00/cfg.cpp
@@ -247,7 +247,7 @@ bool deserializeConfig(JsonObject doc, bool fromFS) {
       uint16_t freqkHz = elm[F("freq")] | 0;  // will be in kHz for DotStar and Hz for PWM
       uint8_t AWmode = elm[F("rgbwm")] | RGBW_MODE_MANUAL_ONLY;
       uint8_t maPerLed = elm[F("ledma")] | LED_MILLIAMPS_DEFAULT;
-      uint16_t maMax = elm[F("maxpwr")] | (ablMilliampsMax * length) / total; // rough (incorrect?) per strip ABL calculation when no config exists
+      uint16_t maMax = elm[F("maxpwr")] | (total > 0 ? (ablMilliampsMax * length) / total : ablMilliampsMax); // rough (incorrect?) per strip ABL calculation when no config exists
       // To disable brightness limiter we either set output max current to 0 or single LED current to 0 (we choose output max current)
       if (Bus::isPWM(ledType) || Bus::isOnOff(ledType) || Bus::isVirtual(ledType)) { // analog and virtual
         maPerLed = 0;