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On the extreme right is the difference between the computer configured with 12GB as compared to 6 GB, while the middle column represents the performance difference between the 24 GB configuration and 12 GB. Table 1 summarizes the test results for the Z600. For whatever the reason, in my tests, which involved strictly rendering, I didn’t see much difference in most test cases. In a real time operation, this could really slow things down, but when encoding in slower than real time, paging back and forth to disk isn’t that much slower than working with RAM. That is, if RAM isn’t available, the system will use the hard disk for temporary storage instead.
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Perhaps this relates to the fact that encoding is a comparably slow operation. The HP Z600, our dual=CPU, 8/16-core contestant.Įxcept in one or two discrete cases, I didn’t see a whole lot of performance difference in the results. Not a huge amount of cash in either case, but certainly you’d certainly like to see some performance boost before making the additional investment.įigure 2. To put these configurations in a bit of perspective, the cost difference between 6GB and 12GB on the HP site is $360, while the difference between 12 GB and 24 GB is $960.
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Certainly you can configure the systems with configurations that don’t divide evenly by 3, but these were the most natural configurations. On the Z600, with two CPUs, the memory would be configured as 6 x 1 GB, 6 x 2GB and 6 x 4GB. With six memory slots on the Z400, the 6 GB configuration used 3 x 2 GB memory DIMMs, 12 GB used 3 x 4 GB DIMMs, while 24 GB used 6 X 4 GB DIMMS. Why these configurations? Because the CPUs on these systems have three channels of memory, so it’s most efficient to use a configuration that divides equally by three. I ran the tests with three different RAM configurations, 6 GB, 12 GB and 24 GB. I ran multiple tests, encoding sequences created from different camera formats, from DV to Red, into multiple outputs, from MPEG-2 for DVD to H.264 for YouTube and Blu-ray. Both systems used the same graphics card, an NVIDIA Quadro FX 4800. The HP Z400, our single CPU, 4/8-core contestant.Īs an overview, I tested with two similarly configured systems from HP, who sponsored this testing, one with a 2.67 GHz 4-core CPU (an HP Z400 ), the other with two 2.67 GHz 4-core CPUs (an HP Z600 ). Table 2: Performance differences between the three RAM configurations for the Z400.įigure 1.Memory usage for a single track Red project with no effects (image from the HP Performance Advisor software). Memory usage for a DV project with Dynamic Link (image from the HP Performance Advisor software). Memory usage for a DV project with no Dynamic Link (image from the HP Performance Advisor software). Table 1: Performance differences between the three RAM configurations for the HP Z600.The HP Z600, our dual=CPU, 8/16-core contestant. The HP Z400, our single CPU, 4/8-core contestant.