2 different pairs of ram

Hey guys so originally I bought 8gb of crucial 1600mhz and later my bro gave me his 8gb of corsair 1600mhz. How nice :)

Now I looked at cpuz and they are running at 1333mhz, I checked in bios and its 1333mhz.

In cpuz it that the crucial runs at 1.5v for 1600 where the corsair runs at 1.65 1600mhz.

Is there a way to make these run at 1600mhz or will they only run at 1333mhz to keep the voltages even ? Il take a screen pic of what cpuz shows later today.
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  1. What is your CPU?
  2. These 2 don't mix well for Sandy Bridge at all and the 1.65 voids warranty.

    It still may work, but its not recommended.
  3. I got the i5 2500k, I mean they work fine on 1333 just wondering if i can change the voltage to 1.65 and run them at 1600mhz, problem is I dont know if the other pair will be okay that suppose to run at 1.5v
  4. They should run just fine @ 1.5v.

    1.65 is not good for the 2500K.
  5. ah okay, Well the corsair is rated at 1.65 I dont know if i can have it running 1600 at 1.5 let me take a screen shot of what cpu z shows. This way you can help me out more
  6. Trying to upload it, having some problems getting it big enough
  7. U don't have to use the XMP, u can set it manually, including the voltage.
  8. alright, and I actually read that i5 2500k only reads 1066/1333mhz ram, So whats the point of having it run 1600 ? Im not fully understanding how this works. Also currently they are running at 1333 1.5v. I could try playing around and see if I can get it to 1.55v at 1600, but then again if the i5 is rated for 1333 will 1600mhz be faster ?
  9. huntsman said:
    alright, and I actually read that i5 2500k only reads 1066/1333mhz ram, So whats the point of having it run 1600 ? Im not fully understanding how this works. Also currently they are running at 1333 1.5v. I could try playing around and see if I can get it to 1.55v at 1600, but then again if the i5 is rated for 1333 will 1600mhz be faster ?

    It was my next advice, if it would not work, than run it in the 1333MHz : )

    The difference would be like the difference is

    between the temperature -20F and -25F - u cant really tell the difference. Only in benchmarks it will show some advantage. Not noticeable in real life.
  10. ah nice, well Im satisfied then. Gonna keep them at 1333mhz 1.5v :) Also does this mean that i5 wont see anything above 1333 ? I read that if you change it in bios it will force the cpu to read the ram. My question is this if the i5 is rated for 1333 why would somebody go and buy 1600 or 2000mhz ram ?
  11. I am running @ 1600MHz, but all is the same. 16GB RAM kit.

    U are mixing 2 different models with 2 different voltages and that is a big deal, and u are lucky it works @ 1333MHz.

    Some mobos don't even post.
  12. U can push the RAM higher, but it must be a kit optimized RAM.

    It also voids the CPU warranty. Both - the voltage above 1.575v and RAM freq. above 1333MHz.
  13. yes but Im saying if you change it then the cpu will see it as 1600 correct, its just that you have to increase the voltage. But what im trying to ask is its not limited/locked to 1333.
  14. also the memory controller is on the cpu right ? so if you increase the ram voltage to much you can fry the cpu ?
  15. I am running @ 1600MHz @ 1.5v

    Yours will run too, but not with mixed RAM stick. The controller is on the CPU and will read 1600 just fine.
  16. so if you increase the ram voltage to much you can fry the cpu ?

    Well, there is now a history with damaged CPU's when used with out of spec RAM.
  17. okay I see, so why does intel rate them at 1333 ? Sorry for all the questions Im just curious to how all this works.
  18. huntsman said:
    okay I see, so why does intel rate them at 1333 ? Sorry for all the questions Im just curious to how all this works.

    They have to design it just right. And they will not push it further because AMD is now far behind in catching them, so Intel does not have to rush to give u fastest CPU now.

    The 2500K is easily best gaming CPU out there, so providing just enough bandwidth and speed that it still wins in most benchmarks.

    Something like that, it could be, but only Intel knows what they are doing.
  19. ah okay so they are just rated like that but you can use any ram speed as long as its 1.5v
    Also I guess you gotta use 1333 in order to not void the warranty. Well thanks for all the help. Oo and one more thing I read that getting 2000mhz vs 1600mhz is not a big difference because of the timings it comes with. So either way the performance is about the same. Whats your opinion on that ?
  20. huntsman said:
    ah okay so they are just rated like that but you can use any ram speed as long as its 1.5v
    Also I guess you gotta use 1333 in order to not void the warranty. Well thanks for all the help. Oo and one more thing I read that getting 2000mhz vs 1600mhz is not a big difference because of the timings it comes with. So either way the performance is about the same. Whats your opinion on that ?

    U need to have good mobo + CPU + cooling, so u can get the CPU speed to get it to higher freq and RAM that is OK for OC. Not all RAM is equal.
  21. huntsman said:
    I read that getting 2000mhz vs 1600mhz is not a big difference because of the timings it comes with. So either way the performance is about the same. Whats your opinion on that ?

    If u are running some 3D rendering,

    than faster RAM (1333 vs 2000) will be done 2-3 hrs faster than the other one,

    out of the 20hrs job.
  22. o okay, so now lets use my set up as an example. Im not gonna change it but just so I understand this. Since 2 pairs of my ram are 1600mhz and timings are like 8 8 8 20 and 9 9 9 24 and the voltages are different 1.5 vs 1.65

    If the one that runs at 1.65 is stable at 1.5v or 1.55v then I could have them all running at 1.55 at 1600mhz. Right ?

    Whats JEDEC or XMP ?
  23. All XMP does, is allow your BIOS to automatically configure the overclocked DRAM voltage and timing information instead of forcing you to do it manually.

    It is saved profile on the RAM and BIOS read that.
  24. U could have them running @ 1.5v too : ) If quality RAM is used.
  25. Read - Introduction to Intel XMP DDR3 Memory Overclocking

    http://www.legitreviews.com/article/613/1/
  26. Well i got crucial and corsair sticks :) I think their pretty good quality. Thanks for the link il give it a look.
  27. They are good quality.

    You're welcome.
  28. I have 1 question. Is that the AMD Memory - performance edition support Black Edition Memory Profile (BEMP)?..
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