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Ram wont run at stock speed - sandy bridge.

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Last response: in Memory
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June 26, 2013 3:32:16 AM

i5 2400
Asus P8B75-M
Corsair 8GB (2x4GB) DDR3 1600MHz Vengeance Memory Kit CL9 1.5V

I have just built the above system, installed latest bios, but the ram will only run @ 1333mhz.
You can change the speed manually (to 1600) in the bios but then it won't reboot.
I know you can run @ 1600 with this board/cpu ??

any ideas,


thanks

June 26, 2013 3:40:45 AM

sandy bridge memory controller only goes up to 1333.... It is built into the CPU. You can tighten the timings a bit but as far as I know that is it...
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June 26, 2013 3:50:55 AM

americanbrian said:
sandy bridge memory controller only goes up to 1333.... It is built into the CPU. You can tighten the timings a bit but as far as I know that is it...


look here http://www.tomshardware.co.uk/forum/311868-30-speed

Shows P8B75-M / sandy, running 1600mhz

I've seen other i5 2nd gen running @1600mhz

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June 26, 2013 4:08:11 AM

Did you read the thread you posted? He was UNABLE TO RUN AT 1600MHz.

You have an i5 2400.... You do not have a K-series.

You cannot overclock a non-k series chip. It is 1333Mhz.... That was the conclusion of the thread.
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June 26, 2013 4:19:44 AM

americanbrian said:
Did you read the thread you posted? He was UNABLE TO RUN AT 1600MHz.

You have an i5 2400.... You do not have a K-series.

You cannot overclock a non-k series chip. It is 1333Mhz.... That was the conclusion of the thread.


No - I do everything half ass'ed, specially reading forum threads, guess I'm stuck with 1333mhz!

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June 26, 2013 4:33:38 AM

LOL! Sorry to be so blunt.

And also sorry that you can't run at the speed you wanted. If you ever find yourself an i5-2500k then you could upgrade it. To be honest though you probably wouldn't have noticed a huge difference even at 1600Mhz. Your platform is more limited by the CPU than by the RAM. (i.e. it doesn't matter how fast you can feed the CPU new data if the CPU is taking its time chewing on the last stuff). You would get a more significant improvement if you had a highly OC'ed CPU which you can't do on a 2400... even then you probably wouldn't really notice much.

If you want a real perceivable boost to your speed a SSD is the best upgrade you can give a relatively modern computer
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June 26, 2013 5:45:32 AM

americanbrian said:
LOL! Sorry to be so blunt.

And also sorry that you can't run at the speed you wanted. If you ever find yourself an i5-2500k then you could upgrade it. To be honest though you probably wouldn't have noticed a huge difference even at 1600Mhz. Your platform is more limited by the CPU than by the RAM. (i.e. it doesn't matter how fast you can feed the CPU new data if the CPU is taking its time chewing on the last stuff). You would get a more significant improvement if you had a highly OC'ed CPU which you can't do on a 2400... even then you probably wouldn't really notice much.

If you want a real perceivable boost to your speed a SSD is the best upgrade you can give a relatively modern computer


That's v interesting, thanks - I will look into SSD (promise not to be half ass'ed about it haha!).

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!