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Overclocking
With very effective third party heatsinks on the market, and many low power
CPUs available, overclocking can improve performance without
compromising the noise level of a silent PC.
A simple overclocking investigation was conducted after lowering the HT multiplier
and RAM frequency, and moderately increasing the RAM voltage. The CPU frequency
was increased in increments of 5MHz/10MHz until the system failed a 5
minute run of Prime95 with ATITool 3DView running simultaneously, failed to
boot, or showed other signs of instability. We then maximized the multiplier
and increased the CPU voltage to a stable level for our final overclock.
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Maximum overclock.
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The highest stable bus frequency we achieved was 340MHz — a 70% overclock
straight-out-of-the-box without an increase in chipset voltage. At higher frequencies,
the system reported a graphics driver failure, suggesting that the IGP couldn't
handle the extra frequency. At this bus speed, the CPU was stable with an 8.5
multiplier, resulting in a final CPU frequency of 2.89GHz.
3D Performance
To get a rough estimate of how well the GeForce 8200-ITX's onboard video plays
games, we ran 3DMark05/06. As synthetic benchmarks they have limited value,
but they give a rough idea of how well it performs.
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3D Performance: Futuremark Comparison
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Motherboard
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Graphics
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3DMark05
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3DMark06
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Asus M2A-VM HDMI
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X1250
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1060
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286
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Gigabyte MA74GM-S2
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X2100
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1124
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305
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Zotac GeForce 8200-ITX
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GF8200
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1623
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869
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Asus M3N78 Pro
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GF8300
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1669
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902
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Asus P5Q-EM
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GMA X4500
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1708
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1092
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Gigabyte MA78GM-2SH
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HD 3200
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2293
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1116
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Gigabyte MA78GM-2SH
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HD 3450
(Discrete)
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3405
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1716
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Asus P5N7A-VM
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GF9300
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3497
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1776
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All results with 2GB of system RAM and 256MB of VRAM
assigned (if applicable). Intel (E7200) systems in blue, AM2 (X2 4850e)
systems in green.
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No surprises here. As GeForce 8200 is simply a slower-clocked version of GeForce
8300, the results fell slightly behind the GeForce 8300-equipped Asus M3N78
Pro.
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