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Old 03-17-2017, 08:37 PM
memory_oc memory_oc is offline
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Question Corsair CMK16GX4M2B3000C15

I have these memory sticks in my pc build (32gb), it says 3000 in the product code or whatever it is, does it mean that is the max overclock speed rating or does that mean it is the optimal speed it would be running at?
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Old 03-18-2017, 07:46 PM
Riz Riz is offline
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Isn't that just the speed it runs at when you have XMP enabled?
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Old 03-19-2017, 04:15 AM
memory_oc memory_oc is offline
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I don't use XMP
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Old 03-19-2017, 04:35 AM
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Check out: http://www.corsair.com/en-gb/vengean...6gx4m2b3000c15

You will see that DDR4-3000 CL15 is what the kit is officially specced to and these specs are programmed to the XMP. So if you don't want to use the XMP, then you have to resort to manual settings for these instead. Otherwise the system will automatically use the highest supported standard profile that is available, which in this case is DDR4-2133 CL15 (listed as SPD latency, speed and voltage in the Corsair specs).
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Old 03-19-2017, 06:02 AM
memory_oc memory_oc is offline
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I have used it manually, but I wanted to know what the 3000 stood for, is that the max OC frequency?
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Old 03-19-2017, 06:44 AM
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3000 is the maximum data rate the DIMMs support. As they are DDR (Double Data Rate) the clock frequency is 1500 MHz.

The CPU memory controller may need to be OCed to run at this speed.
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Old 03-19-2017, 07:35 AM
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Quote:
Originally Posted by memory_oc View Post
I have used it manually, but I wanted to know what the 3000 stood for, is that the max OC frequency?
On manual settings you can probably get more than DDR4-3000 out of them. How much exactly varies from kit to kit, so that is something that you have to find out yourself.
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Old 03-19-2017, 08:02 AM
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No, it's not a speed limit or "maximum safe frequency". It's also not a guarantee your PC can run that speed. I can buy 4000 MHz modules for my PC, but it will never boot. The maximum speed you can run will be a limited by a combination of motherboard, CPU, and memory module characteristics.

The rule makers require manufactures to use "presets" if they want to sell a module that operates at a different frequency than the standard 2133. The XMP setting is that preset and yours is 3000 MHz. It's a one button memory overclock. Companies usually list and sell their kits based on the XMP speed and kits that come with a higher XMP speed generally cost more. As mentioned above, it's not an either/or kind of thing with 2133/3000. You can manually set your memory in between those numbers or possibly higher with a fair amount of trial and error. However, absent any changes in BIOS by you, the memory will run at 2133 MHz.
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