diff --git a/src/core/core.vcxproj b/src/core/core.vcxproj
index 74a866a63..cb0e1ac12 100644
--- a/src/core/core.vcxproj
+++ b/src/core/core.vcxproj
@@ -51,6 +51,7 @@
     <ClCompile Include="memory_card.cpp" />
     <ClCompile Include="pad.cpp" />
     <ClCompile Include="pad_device.cpp" />
+    <ClCompile Include="settings.cpp" />
     <ClCompile Include="spu.cpp" />
     <ClCompile Include="system.cpp" />
     <ClCompile Include="timers.cpp" />
@@ -75,6 +76,7 @@
     <ClInclude Include="pad.h" />
     <ClInclude Include="pad_device.h" />
     <ClInclude Include="save_state_version.h" />
+    <ClInclude Include="settings.h" />
     <ClInclude Include="spu.h" />
     <ClInclude Include="system.h" />
     <ClInclude Include="timers.h" />
diff --git a/src/core/core.vcxproj.filters b/src/core/core.vcxproj.filters
index 67d1d3705..4ac36b39f 100644
--- a/src/core/core.vcxproj.filters
+++ b/src/core/core.vcxproj.filters
@@ -20,6 +20,7 @@
     <ClCompile Include="spu.cpp" />
     <ClCompile Include="mdec.cpp" />
     <ClCompile Include="memory_card.cpp" />
+    <ClCompile Include="settings.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="types.h" />
@@ -45,6 +46,7 @@
     <ClInclude Include="spu.h" />
     <ClInclude Include="mdec.h" />
     <ClInclude Include="memory_card.h" />
+    <ClInclude Include="settings.h" />
   </ItemGroup>
   <ItemGroup>
     <None Include="cpu_core.inl" />
diff --git a/src/core/gpu.cpp b/src/core/gpu.cpp
index 0c3b05c30..87d896d73 100644
--- a/src/core/gpu.cpp
+++ b/src/core/gpu.cpp
@@ -6,10 +6,9 @@
 #include "stb_image_write.h"
 #include "system.h"
 #include "timers.h"
+#include <imgui.h>
 Log_SetChannel(GPU);
 
-bool GPU::DUMP_CPU_TO_VRAM_COPIES = false;
-bool GPU::DUMP_VRAM_TO_CPU_COPIES = false;
 static u32 s_cpu_to_vram_dump_id = 1;
 static u32 s_vram_to_cpu_dump_id = 1;
 
@@ -129,7 +128,16 @@ bool GPU::DoState(StateWrapper& sw)
   return !sw.HasError();
 }
 
-void GPU::RenderUI() {}
+void GPU::RenderStatistics() {}
+
+void GPU::RenderDebugMenu()
+{
+  ImGui::MenuItem("Show VRAM", nullptr, &m_debug_options.show_vram);
+  ImGui::MenuItem("Dump CPU to VRAM Copies", nullptr, &m_debug_options.dump_cpu_to_vram_copies);
+  ImGui::MenuItem("Dump VRAM to CPU Copies", nullptr, &m_debug_options.dump_vram_to_cpu_copies);
+}
+
+void GPU::UpdateSettings() {}
 
 void GPU::UpdateGPUSTAT()
 {
@@ -678,7 +686,7 @@ bool GPU::HandleCopyRectangleCPUToVRAMCommand()
     return true;
   }
 
-  if (DUMP_CPU_TO_VRAM_COPIES)
+  if (m_debug_options.dump_cpu_to_vram_copies)
   {
     DumpVRAMToFile(SmallString::FromFormat("cpu_to_vram_copy_%u.png", s_cpu_to_vram_dump_id++), copy_width, copy_height,
                    sizeof(u16) * copy_width, &m_GP0_command[3], true);
@@ -718,7 +726,7 @@ bool GPU::HandleCopyRectangleVRAMToCPUCommand()
   for (const u32 bits : temp)
     m_GPUREAD_buffer.push_back(bits);
 
-  if (DUMP_VRAM_TO_CPU_COPIES)
+  if (m_debug_options.dump_vram_to_cpu_copies)
   {
     DumpVRAMToFile(SmallString::FromFormat("vram_to_cpu_copy_%u.png", s_cpu_to_vram_dump_id++), width, height,
                    sizeof(u16) * width, temp.data(), true);
diff --git a/src/core/gpu.h b/src/core/gpu.h
index 472241c33..67544e8d9 100644
--- a/src/core/gpu.h
+++ b/src/core/gpu.h
@@ -16,13 +16,33 @@ class Timers;
 class GPU
 {
 public:
+  static constexpr float DISPLAY_ASPECT_RATIO = 4.0f / 3.0f;
+  enum : u32
+  {
+    VRAM_WIDTH = 1024,
+    VRAM_HEIGHT = 512,
+    VRAM_SIZE = VRAM_WIDTH * VRAM_HEIGHT * sizeof(u16),
+    TEXTURE_PAGE_WIDTH = 256,
+    TEXTURE_PAGE_HEIGHT = 256,
+    DOT_TIMER_INDEX = 0,
+    HBLANK_TIMER_INDEX = 1
+  };
+
   GPU();
   virtual ~GPU();
 
   virtual bool Initialize(System* system, DMA* dma, InterruptController* interrupt_controller, Timers* timers);
   virtual void Reset();
   virtual bool DoState(StateWrapper& sw);
-  virtual void RenderUI();
+
+  // Render statistics debug window.
+  virtual void RenderStatistics();
+
+  // Manipulating debug options.
+  virtual void RenderDebugMenu();
+
+  // Called when settings change.
+  virtual void UpdateSettings();
 
   u32 ReadRegister(u32 offset);
   void WriteRegister(u32 offset, u32 value);
@@ -37,15 +57,6 @@ public:
   void Execute(TickCount ticks);
 
 protected:
-  static constexpr float DISPLAY_ASPECT_RATIO = 4.0f / 3.0f;
-  static constexpr u32 VRAM_WIDTH = 1024;
-  static constexpr u32 VRAM_HEIGHT = 512;
-  static constexpr u32 VRAM_SIZE = VRAM_WIDTH * VRAM_HEIGHT * sizeof(u16);
-  static constexpr u32 TEXTURE_PAGE_WIDTH = 256;
-  static constexpr u32 TEXTURE_PAGE_HEIGHT = 256;
-  static constexpr u32 DOT_TIMER_INDEX = 0;
-  static constexpr u32 HBLANK_TIMER_INDEX = 1;
-
   static constexpr s32 S11ToS32(u32 value)
   {
     if (value & (UINT16_C(1) << 10))
@@ -156,6 +167,13 @@ protected:
     s32 y() const { return S11ToS32(y_s11); }
   };
 
+  struct DebugOptions
+  {
+    bool show_vram;
+    bool dump_cpu_to_vram_copies;
+    bool dump_vram_to_cpu_copies;
+  };
+
   void SoftReset();
 
   // Sets dots per scanline
@@ -331,7 +349,5 @@ protected:
   std::vector<u32> m_GP0_command;
   std::deque<u32> m_GPUREAD_buffer;
 
-  // debug options
-  static bool DUMP_CPU_TO_VRAM_COPIES;
-  static bool DUMP_VRAM_TO_CPU_COPIES;
+  DebugOptions m_debug_options = {};
 };
diff --git a/src/core/gpu_hw_opengl.cpp b/src/core/gpu_hw_opengl.cpp
index eaab29c70..897e40fb4 100644
--- a/src/core/gpu_hw_opengl.cpp
+++ b/src/core/gpu_hw_opengl.cpp
@@ -35,9 +35,9 @@ void GPU_HW_OpenGL::Reset()
   ClearFramebuffer();
 }
 
-void GPU_HW_OpenGL::RenderUI()
+void GPU_HW_OpenGL::RenderStatistics()
 {
-  GPU_HW::RenderUI();
+  GPU_HW::RenderStatistics();
 
   ImGui::SetNextWindowSize(ImVec2(300.0f, 130.0f), ImGuiCond_Once);
 
@@ -48,7 +48,7 @@ void GPU_HW_OpenGL::RenderUI()
     m_stats = {};
   }
 
-  if (ImGui::Begin("GL Render Statistics"))
+  if (ImGui::Begin("GPU Render Statistics"))
   {
     ImGui::Columns(2);
     ImGui::SetColumnWidth(0, 200.0f);
@@ -72,33 +72,27 @@ void GPU_HW_OpenGL::RenderUI()
     ImGui::NextColumn();
     ImGui::Text("%s", is_null_frame ? "Yes" : "No");
     ImGui::NextColumn();
-
-    ImGui::Columns(1);
-
-    ImGui::Checkbox("Show VRAM##gpu_gl_show_vram", &m_show_vram);
-
-    static constexpr std::array<const char*, 16> internal_resolution_items = {
-      {"1x Internal Resolution", "2x Internal Resolution", "3x Internal Resolution", "4x Internal Resolution",
-       "5x Internal Resolution", "6x Internal Resolution", "7x Internal Resolution", "8x Internal Resolution",
-       "9x Internal Resolution", "10x Internal Resolution", "11x Internal Resolution", "12x Internal Resolution",
-       "13x Internal Resolution", "14x Internal Resolution", "15x Internal Resolution", "16x Internal Resolution"}};
-
-    int internal_resolution_item =
-      std::clamp(static_cast<int>(m_resolution_scale) - 1, 0, static_cast<int>(internal_resolution_items.size()));
-    if (ImGui::Combo("##gpu_internal_resolution", &internal_resolution_item, internal_resolution_items.data(),
-                     static_cast<int>(internal_resolution_items.size())))
-    {
-      m_resolution_scale = static_cast<u32>(internal_resolution_item + 1);
-      m_system->GetHostInterface()->AddOSDMessage(
-        TinyString::FromFormat("Internal resolution changed to %ux, recompiling programs", m_resolution_scale));
-      CreateFramebuffer();
-      CompilePrograms();
-    }
   }
 
   ImGui::End();
 }
 
+void GPU_HW_OpenGL::UpdateSettings()
+{
+  GPU_HW::UpdateSettings();
+
+  if (m_resolution_scale != m_system->GetSettings().gpu_resolution_scale)
+  {
+    m_resolution_scale = m_system->GetSettings().gpu_resolution_scale;
+    CreateFramebuffer();
+    CompilePrograms();
+
+    m_system->GetHostInterface()->AddOSDMessage(TinyString::FromFormat("Changed internal resolution to %ux (%ux%u)",
+                                                                       m_resolution_scale, m_vram_texture->GetWidth(),
+                                                                       m_vram_texture->GetHeight()));
+  }
+}
+
 void GPU_HW_OpenGL::InvalidateVRAMReadCache()
 {
   m_vram_read_texture_dirty = true;
@@ -357,7 +351,7 @@ void GPU_HW_OpenGL::UpdateDisplay()
   const u32 texture_height = m_vram_texture->GetHeight();
 
   // TODO: 24-bit support.
-  if (m_show_vram)
+  if (m_debug_options.show_vram)
   {
     m_system->GetHostInterface()->SetDisplayTexture(m_vram_texture.get(), 0, 0, texture_width, texture_height, 1.0f);
   }
diff --git a/src/core/gpu_hw_opengl.h b/src/core/gpu_hw_opengl.h
index 3efde427f..5869faa08 100644
--- a/src/core/gpu_hw_opengl.h
+++ b/src/core/gpu_hw_opengl.h
@@ -15,7 +15,8 @@ public:
 
   bool Initialize(System* system, DMA* dma, InterruptController* interrupt_controller, Timers* timers) override;
   void Reset() override;
-  void RenderUI() override;
+  void RenderStatistics() override;
+  void UpdateSettings() override;
 
 protected:
   void UpdateDisplay() override;
@@ -73,5 +74,4 @@ private:
 
   GLStats m_stats = {};
   GLStats m_last_stats = {};
-  bool m_show_vram = false;
 };
diff --git a/src/core/host_interface.cpp b/src/core/host_interface.cpp
index 7330cae07..fcbec0e90 100644
--- a/src/core/host_interface.cpp
+++ b/src/core/host_interface.cpp
@@ -10,7 +10,9 @@ HostInterface::~HostInterface() = default;
 
 bool HostInterface::InitializeSystem(const char* filename, const char* exp1_filename)
 {
-  m_system = std::make_unique<System>(this);
+  Settings settings;
+
+  m_system = std::make_unique<System>(this, settings);
   if (!m_system->Initialize())
   {
     m_system.reset();
diff --git a/src/core/settings.cpp b/src/core/settings.cpp
new file mode 100644
index 000000000..96aa9b689
--- /dev/null
+++ b/src/core/settings.cpp
@@ -0,0 +1,3 @@
+#include "settings.h"
+
+Settings::Settings() = default;
\ No newline at end of file
diff --git a/src/core/settings.h b/src/core/settings.h
new file mode 100644
index 000000000..4b662d32f
--- /dev/null
+++ b/src/core/settings.h
@@ -0,0 +1,18 @@
+#pragma once
+#include "types.h"
+
+enum class GPUBackend
+{
+  OpenGL
+};
+
+struct Settings
+{
+  Settings();
+
+  GPUBackend gpu_backend = GPUBackend::OpenGL;
+  u32 gpu_resolution_scale = 1;
+  
+  // TODO: Controllers, memory cards, etc.
+};
+
diff --git a/src/core/system.cpp b/src/core/system.cpp
index 760ad68c0..7727378f7 100644
--- a/src/core/system.cpp
+++ b/src/core/system.cpp
@@ -15,7 +15,8 @@
 #include <cstdio>
 Log_SetChannel(System);
 
-System::System(HostInterface* host_interface) : m_host_interface(host_interface)
+System::System(HostInterface* host_interface, const Settings& settings)
+  : m_host_interface(host_interface), m_settings(settings)
 {
   m_cpu = std::make_unique<CPU::Core>();
   m_bus = std::make_unique<Bus>();
@@ -32,6 +33,11 @@ System::System(HostInterface* host_interface) : m_host_interface(host_interface)
 
 System::~System() = default;
 
+void System::UpdateSettings()
+{
+  m_gpu->UpdateSettings();
+}
+
 bool System::Initialize()
 {
   if (!m_cpu->Initialize(m_bus.get()))
@@ -145,11 +151,6 @@ void System::RunFrame()
   }
 }
 
-void System::RenderUI()
-{
-  m_gpu->RenderUI();
-}
-
 bool System::LoadEXE(const char* filename)
 {
 #pragma pack(push, 1)
diff --git a/src/core/system.h b/src/core/system.h
index afb5f6228..399257410 100644
--- a/src/core/system.h
+++ b/src/core/system.h
@@ -1,4 +1,5 @@
 #pragma once
+#include "settings.h"
 #include "types.h"
 #include <memory>
 
@@ -7,8 +8,7 @@ class StateWrapper;
 
 class HostInterface;
 
-namespace CPU
-{
+namespace CPU {
 class Core;
 }
 
@@ -26,16 +26,22 @@ class MDEC;
 class System
 {
 public:
-  System(HostInterface* host_interface);
+  System(HostInterface* host_interface, const Settings& settings);
   ~System();
 
   HostInterface* GetHostInterface() const { return m_host_interface; }
+  CPU::Core* GetCPU() const { return m_cpu.get(); }
+  Bus* GetBus() const { return m_bus.get(); }
+  GPU* GetGPU() const { return m_gpu.get(); }
 
   u32 GetFrameNumber() const { return m_frame_number; }
   u32 GetInternalFrameNumber() const { return m_internal_frame_number; }
   void IncrementFrameNumber() { m_frame_number++; }
   void IncrementInternalFrameNumber() { m_internal_frame_number++; }
 
+  Settings& GetSettings() { return m_settings; }
+  void UpdateSettings();
+
   bool Initialize();
   void Reset();
 
@@ -43,7 +49,6 @@ public:
   bool SaveState(ByteStream* state);
 
   void RunFrame();
-  void RenderUI();
 
   bool LoadEXE(const char* filename);
   bool SetExpansionROM(const char* filename);
@@ -74,4 +79,6 @@ private:
   std::unique_ptr<MDEC> m_mdec;
   u32 m_frame_number = 1;
   u32 m_internal_frame_number = 1;
+
+  Settings m_settings;
 };
diff --git a/src/duckstation/sdl_interface.cpp b/src/duckstation/sdl_interface.cpp
index af86718c8..284367af1 100644
--- a/src/duckstation/sdl_interface.cpp
+++ b/src/duckstation/sdl_interface.cpp
@@ -3,6 +3,7 @@
 #include "YBaseLib/Error.h"
 #include "YBaseLib/Log.h"
 #include "core/digital_controller.h"
+#include "core/gpu.h"
 #include "core/memory_card.h"
 #include "core/system.h"
 #include "icon.h"
@@ -458,7 +459,8 @@ void SDLInterface::RenderImGui()
 {
   RenderMainMenuBar();
 
-  m_system->RenderUI();
+  if (m_show_gpu_statistics)
+    m_system->GetGPU()->RenderStatistics();
 
   RenderOSDMessages();
 
@@ -518,6 +520,48 @@ void SDLInterface::RenderMainMenuBar()
     ImGui::EndMenu();
   }
 
+  if (ImGui::BeginMenu("Settings"))
+  {
+    if (ImGui::BeginMenu("GPU"))
+    {
+      if (ImGui::BeginMenu("Internal Resolution"))
+      {
+        const u32 current_internal_resolution = m_system->GetSettings().gpu_resolution_scale;
+        for (u32 scale = 1; scale <= 16; scale++)
+        {
+          bool selected = current_internal_resolution == scale;
+          if (ImGui::MenuItem(
+                TinyString::FromFormat("%ux (%ux%u)", scale, scale * GPU::VRAM_WIDTH, scale * GPU::VRAM_HEIGHT),
+                nullptr, &selected))
+          {
+            m_system->GetSettings().gpu_resolution_scale = scale;
+            m_system->UpdateSettings();
+          }
+        }
+
+        ImGui::EndMenu();
+      }
+
+      ImGui::EndMenu();
+    }
+
+    ImGui::EndMenu();
+  }
+
+  if (ImGui::BeginMenu("Debug"))
+  {
+    if (ImGui::BeginMenu("GPU"))
+    {
+      ImGui::MenuItem("Show Statistics", nullptr, &m_show_gpu_statistics);
+      ImGui::Separator();
+
+      m_system->GetGPU()->RenderDebugMenu();
+      ImGui::EndMenu();
+    }
+
+    ImGui::EndMenu();
+  }
+
   ImGui::SetCursorPosX(ImGui::GetIO().DisplaySize.x - 170.0f);
   ImGui::Text("FPS: %.2f", m_fps);
 
diff --git a/src/duckstation/sdl_interface.h b/src/duckstation/sdl_interface.h
index 5e3adf3f6..aebdc0a3f 100644
--- a/src/duckstation/sdl_interface.h
+++ b/src/duckstation/sdl_interface.h
@@ -87,4 +87,7 @@ private:
   u32 m_last_frame_number = 0;
   u32 m_last_internal_frame_number = 0;
   Timer m_fps_timer;
+
+  // UI options
+  bool m_show_gpu_statistics = false;
 };