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發表於 2018-5-26 13:38:30
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本帖最後由 spang123 於 2018-5-26 13:43 編輯
Hi Ben sir,
Thank you for your kind sharing and comment. But the test results that you mentioned is predictable.
First of all, we are talking about what PC is good for connection to DAC under the subject of this thread. Actually, I also wanted to mention the SGMS earlier in this thread. But, in fact, the SGMS is in a different league of higher rank when compared to PC, as I believe that its power supply and clocks must be highly modified and optimized to such an extent to provide the best possible SQ. Otherwise, it would not have such a considerable price tag. Therefore it may not be appropriate to use SGMS to compare with ordinary PC with modifications.
If you already have a SGMS, you simply do not need to connect it to a PC NAA, because the quality of sound signals from it is already better than PC, even though the PC is optimized by all the add on linear power supplies, usb card, and low power consumption motherboard, and etc. Therefore connecting the SGMS to a NAA will simply deteriorate the SQ because the NAA becomes the bottleneck affecting the SQ.
However, regarding the CPU power, it is usually a general indicator to the overall power consumption of the motherboard, which, in turn affects the power regulator module and other power consumption components that generate noise on the board. On the other hand, whether a low power motherboard got good onboard regulator or not depends on its design and the manufacturer. For example, Supermicro does have good low power motherboard that even off-shelf music server uses. Therefore selection of good motherboard is also an important factor affecting the final SQ.
Finally, I agree that low latency memory is always good, but whether high power consumption/ high frequency CPU sounds better depends on its application. I tend to believe that there should be proper balance between performance requirements and power consumption. If such a high power CPU is used in low performance requirements application like the HQPlayer NAA, I would believe it would do more harm than good. The analogy is that if someone drives a car of large engine cc capacity, it will bound to consume more gasoline when compared to a much smaller cc engine car, even though the driving distances are the same. So, the current and hence EMI/ electrical noise on the board are bound to be higher.
After all, I do not think it is appropriate to use SGMS in a test to compare with modified PC, because they are of different league. The SGMS is obviously of higher rank, isn't it?
Anyway, thanks again for your kind sharing. |
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