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HP Pavilion 595-p1009

I have a issue, I bought Patriot Viper Elite II DDR4 16GB(2 x 8GB) 2666MHz Memory Kit, this ram is supported by my PC. The issue is that it is running at base DDR4 clock, 2133mhz. My CPU (i5-9400f) and motherboard (Lincs 843b) supports up to 2666mhz. It is said that RAM will run at the maximum speed of the CPU and motherboard if it does not support XMP, but this is not the case here. It is not running at the maximum speed supported.

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