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Sony PSP
Clarification requested for the Card speed results thread
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<blockquote data-quote="Tikker" data-source="post: 1238222" data-attributes="member: 73275"><p>The Performance Index is completely different to the previous version. At first the formula</p><p>for calculating works now by weighting factors. <strong>So the most important test, which is obviously</strong></p><p><strong>the 32kB blocksize reading test</strong>, has a higher weighting for the PI than for example the 512B</p><p>blocksize writing. Also the Filesystem tests were removed, as they appear to be too heavily</p><p>dependent on fragmentation and formatting. blackSPEED now only measures raw-speeds, which is</p><p>absolutely fragmentation and formatting independent.</p><p>Also some speed optimizations were introduced to max out the read/write-performance, especially</p><p>on low blocksizes. This includes setting the CPU/BUS to 333/166, loop optimizations and higher</p><p>priority-level of the app.</p><p>To distinguish the new Performance Index from the old v1.0 one, the base score is now 100. This</p><p>is the score that the original Sony 32MB stick has which came with your psp. So if your stick</p><p>for example has an Performance Index of 236 this means that it has 236% the speed of the 32MB</p><p>stick (meaning the test run 2.36 times faster than with the original 32 MB stick).</p><p></p><p></p><p></p><p></p><p>bigger PI number is better, and the most important stat is the 32K read speeds</p></blockquote><p></p>
[QUOTE="Tikker, post: 1238222, member: 73275"] The Performance Index is completely different to the previous version. At first the formula for calculating works now by weighting factors. [b]So the most important test, which is obviously the 32kB blocksize reading test[/b], has a higher weighting for the PI than for example the 512B blocksize writing. Also the Filesystem tests were removed, as they appear to be too heavily dependent on fragmentation and formatting. blackSPEED now only measures raw-speeds, which is absolutely fragmentation and formatting independent. Also some speed optimizations were introduced to max out the read/write-performance, especially on low blocksizes. This includes setting the CPU/BUS to 333/166, loop optimizations and higher priority-level of the app. To distinguish the new Performance Index from the old v1.0 one, the base score is now 100. This is the score that the original Sony 32MB stick has which came with your psp. So if your stick for example has an Performance Index of 236 this means that it has 236% the speed of the 32MB stick (meaning the test run 2.36 times faster than with the original 32 MB stick). bigger PI number is better, and the most important stat is the 32K read speeds [/QUOTE]
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Clarification requested for the Card speed results thread
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