最近，我将 RAM 模块升级为 2*4GB 800 Mhz 双通道。我的 Ubuntu 12.04 中也有 10GB 交换空间。有点奇怪的是，我在 BIOS 上没有操作板载显卡的选项（Inspiron-1545，BIOS 版本 A14）。更换 RAM 模块后，BIOS 中仍然写入 32 MB。
现在我的光圈为 256M，有什么办法可以手动增加光圈以获得更好的高清视频性能吗？请有人解释一下 BIOS 的 32MB 和光圈的 256MB 之间的区别。
以下是我的系统和显卡基准的一些信息：
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glmark2 2011.09
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OpenGL Information
GL_VENDOR: Intel Open Source Technology Center
GL_RENDERER: Mesa DRI Mobile Intel® GM45 Express Chipset
GL_VERSION: 2.1 Mesa 9.1.7
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[build] use-vbo=false: FPS: 300
[build] use-vbo=true: FPS: 325
[texture] texture-filter=nearest: FPS: 374
[texture] texture-filter=linear: FPS: 375
[texture] texture-filter=mipmap: FPS: 410
[shading] shading=gouraud: FPS: 250
[shading] shading=blinn-phong-inf: FPS: 260
[shading] shading=phong: FPS: 222
[bump] bump-render=high-poly: FPS: 156
[bump] bump-render=normals: FPS: 353
[effect2d] kernel=0,1,0;1,-4,1;0,1,0;: FPS: 145
[effect2d] kernel=1,1,1,1,1;1,1,1,1,1;1,1,1,1,1;: FPS: 72
[pulsar] light=false:quads=5:texture=false: FPS: 300
[desktop] blur-radius=5:effect=blur:passes=1:separable=true:windows=4: FPS: 74
[conditionals] fragment-steps=0:vertex-steps=0: FPS: 327
[conditionals] fragment-steps=5:vertex-steps=0: FPS: 268
[conditionals] fragment-steps=0:vertex-steps=5: FPS: 327
[function] fragment-complexity=low:fragment-steps=5: FPS: 324
[function] fragment-complexity=medium:fragment-steps=5: FPS: 242
[loop] fragment-loop=false:fragment-steps=5:vertex-steps=5: FPS: 315
[loop] fragment-steps=5:fragment-uniform=false:vertex-steps=5: FPS: 315
[loop] fragment-steps=5:fragment-uniform=true:vertex-steps=5: FPS: 226
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glmark2 Score: 270
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显卡信息：
[0.000000] No AGP bridge found
[0.000000] No AGP bridge found
[0.718565] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xe0000000