Yes, DDR4 2666MHz and 2933MHz are compatible with most modern systems.
Yes, DDR4 2666MHz and 2933MHz are compatible with most modern systems.
I bought a laptop with 8GB DDR4 at 2933MHz. The seller suggested adding more RAM, but it turns out they installed 8GB of 2666MHz RAM when I received the bill. Will there be any problems?
The laptop will operate at the reduced 2666 speed. If you turned it on in BIOS with a different setting, it should function properly.
This situation is quite complex but should function properly once started. It will operate at the lowest common denominator, which is 2666mhz (or 2400mhz). The main concern might be a rise in memory latency because RAM timing is being adjusted to fit both memory modules. You can verify your settings in BIOS or use tools like CPUID or HWInfo within Windows to confirm the timings.
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