try to manipulate slider step

templates/client/default/ui/core/default/widget/forms/fields/range.tpl

@@ -35,7 +35,10 @@
     <input type="range"
            id="{$rawObject->getId()}"
            name="{$rawObject->getName()}" min="{$rawObject->getMinValue()}"
-           max="{$rawObject->getMaxValue()}" step="512" 
+           max="{$rawObject->getMaxValue()}"
+            {if $rawObject->getName() == "memory"}
+                step="512"
+            {/if}
             {if $rawObject->isOutputVisible()}
             oninput="output{$rawObject->getId()}.value={$rawObject->getId()}.value"
            {/if}