[記憶體] 點解有ram個速度低過同款既,但個價錢會反而更貴?

舉個例:
Kingston HyperX Predator HX430C15PB3K2/16 DDR4 3000MHz 16GB Kit (2x8GB) 連黑色散熱片        HK$ 1730


Kingston HyperX Predator HX432C16PB3K2/16 DDR4 3200MHz 16GB Kit (2x8GB) 連黑色散熱片        HK$ 1699

因為係CL15及CL16既分別

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回覆 2# antonyhk
請教下program 計算速度,邊個影響較大?
cl? mhz?

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我估CL .

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我相信3000 CL15超上3200 CL16成功率好高
但係3200 CL16降落3000 CL15成功率就好低

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回覆 5# KinChungE
點解要降速?
唔係要提高效能咩?

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回覆  KinChungE
點解要降速?
唔係要提高效能咩?
imback 發表於 2018-2-12 16:26


CL越低, 效能越高
至於高MHz好定低CL好, 視乎你做乜
打機高MHz高好, 運算低CL好

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我記得You tube有片講過點樣計CL同MHz嘅關係, DDR4應該係CL 14 3200MHz 係最快

via HKEPC Reader for Android

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DDR3 2400MHZ CL11大概等於DDR4邊個水平?

via HKEPC Reader for Android

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DDR3 2400MHZ CL11大概等於DDR4邊個水平?

via HKEPC Reader for Android
rt2156 發表於 2018-2-12 18:48

我見外國啲人咁樣計的
What would be faster? 3000MHz C15, 3466 MHz C16, or 3600MHz C18?
15/3,000,000,000 = 0.000000005 of a second
16/3,466,000,000 = 0.0000000046
18/3,600,000,000 = 0.000000005
So, while *technically* the 3466MHz @ CL16 is "faster" than the other two at processing it's given task in cycles, it's such a fraction of time, that it's unlikely to be a worthwhile consideration.

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