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i5-2500k and 2400Mhz ram; Should I underclock or send back?

I just bought a new set of ram (2x8gb Kingston hyperx beast 2400mhz cl11), but just learned they're not compatible with my 2500k sandy bridge. What's the best option?

I've got a msi mpower z77 motherboard if that's of any relevance.

Hope you guys have some suggestions, and thanks in advance!

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You only have two options. 


1 - Upgrade CPU

2 - Downgrade RAM


I'd say go with #1.



Edit: Added #3 - Underclock RAM


Go with #3.

MOBO - Asus Sabertooth 990FX R2.0   CPU - AMD Phenom II X6 1055T @ 3.5GHz - Corsair H80i   RAM - 2x Corsair Vengence 4GB DDR3 @ 1666 MHz   

GPU - SAPPHIRE 100362-3L Radeon R9 290 4GB Tri-X OC  Sound - ASUS Xonar DSX  PSU - Thermaltake SMART M Series SP-850M 850W

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I should be able to lower the timings if I underclock, right? If so, what am I aiming for?

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why would you say they are not compatible?


to be honest very few processors are actually rated with memory speeds above 1600MHz.


just remember you will most likely need 1.71V-1.72V to have this memory run at 2400MHz, not 1.65V like XMP suggests


I have faith in the z77 mpower and 2500k running this ram at its rated speeds.


the second xmp profile is set @ 2133 cl 11.


you wont get cl10 unless you drop back to 1866

Mainboard Asrock Z170 OCF CPU 6700k RAM Tridentz 3600 HDD Intel 730 240gb GPU GTX 780ti sc acx PSU Silverstone Strider 1200W  Case Antec 900 Laptop Lenovo Thinkpad T520 build log-   http://linustechtips.com/main/topic/35809-antec-900-the-re-birth-of-a-legend/ Check out the Tech Center https://www.youtube.com/user/prokon24/videos LTT's Unicore King


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