http://www.techreport.com/articles.x/17732
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In the early days of GPUs, application-specification performance optimizations in graphics drivers were viewed by many as cheating. Accusations were hurled with regularity, and in some cases, there was real cheating going on. Some optimizations surreptitiously degraded image quality in order to boost performance, which obviously isn't kosher.
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Futuremark's popular 3DMark benchmark has been the target of several questionable optimizations over the years.
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With the exception of configuring the correct rendering mode on multi-GPU systems, it is prohibited for the driver to detect the launch of 3DMark Vantage executable and to alter, replace or override any quality parameters or parts of the benchmark workload based on the detection. Optimizations in the driver that utilize empirical data of 3DMark Vantage workloads are prohibited.
No ambiguity there, then: Vantage-specific optimizations aren't allowed.
Intel may not be playing fair, though. We recently learned AMD has notified Futuremark that Intel's 15.15.4.1872 Graphics Media Accelerator drivers for Windows 7 incorporate performance optimizations that specifically target the benchmark, so we decided to investigate.
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We first ran the benchmark normally. Then, we renamed the 3DMark executable from "3DMarkVantage.exe" to "3DMarkVintage.exe". And?wouldn't you know it??there was a substantial performance difference between the two.
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Our system's overall score climbs by 37% when the graphics driver knows it's running Vantage. That's not all. Check out the CPU and GPU components of the overall score:
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The GPU score jumps by a whopping 46% thanks to Intel's apparent Vantage optimization. At the same time, the CPU score falls by nearly 10%. Curious.
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Intel appears to be offloading some of the work associated with the GPU tests onto the CPU in order to improve 3DMark scores.When asked for comment, Intel replied with the following:
"We have engineered intelligence into our 4 series graphics driver such that when a workload saturates graphics engine with pixel and vertex processing, the CPU can assist with DX10 geometry processing to enhance overall performance...."
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Here's the tricky part: the very same 785G system managed 30 frames per second in Crysis: Warhead, which is twice the frame rate of the G41 with all its vertex offloading mojo in action. The G41's new-found dominance in 3DMark doesn't translate to superior gaming performance, even in this game targeted by the same optimization.
Larrabee's TWIMTBB also?
lol
jk