Using 3000MHz RAM, will overclock the bus, is it safe?

sblantipodi

sblantipodi

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As title.
I'm planning to buy an X99 motherboard and I need to choose the ram.

If I buy 3000MHz ram, I need to overclock the bus to 125MHz, is this safe?
I know that overclocking the bus is very dangerous and prone to instability.
Does this overclock influence other peripherals like SSD, HDD and other components like happened on Pentium III?
 
if you buy 3000mhz rated RAM nope, you do not have to increase the BCLK to achieve those speed, just enter in BIOS and select the rated speed and timings if you don't know timings or do not want to mess with it, you can just select XMP and the motherboard will do all for you.. but nope, you do not have to increase the BCLK..

haswell have a good thing and its the ability to overclock again with BCLK which its generally useful to overclock the RAM if you want to, if you read the 5960X [H] review they used 1866mhz RAM and overclocked the CPU via BCLK and Strap to overclock both CPU and RAM without any issue to 2800mhz..

in sandy bridge you were forced to 100mhz because the bus affected all peripheral speeds, with ivy bridge they implemented a bit of change to overclock ram with the strap 100:133 to keep the overall bus at 100 and RAM bus at 133 which allow higher RAM overclock.. with haswell they unlocked if remember correctly 3 BCLK phases 100mhz, 125mhz, 167mhz and 250mhz with a tolerance of -5 to +5mhz for each strap.. so for your X99 setup no, you do not have to overclock the system to enjoy your ram at 3000mhz..
 
Araxie said:
if you buy 3000mhz rated RAM nope, you do not have to increase the BCLK to achieve those speed, just enter in BIOS and select the rated speed and timings if you don't know timings or do not want to mess with it, you can just select XMP and the motherboard will do all for you.. but nope, you do not have to increase the BCLK..

haswell have a good thing and its the ability to overclock again with BCLK which its generally useful to overclock the RAM if you want to, if you read the 5960X [H] review they used 1866mhz RAM and overclocked the CPU via BCLK and Strap to overclock both CPU and RAM without any issue to 2800mhz..

in sandy bridge you were forced to 100mhz because the bus affected all peripheral speeds, with ivy bridge they implemented a bit of change to overclock ram with the strap 100:133 to keep the overall bus at 100 and RAM bus at 133 which allow higher RAM overclock.. with haswell they unlocked if remember correctly 3 BCLK phases 100mhz, 125mhz, 167mhz and 250mhz with a tolerance of -5 to +5mhz for each strap.. so for your X99 setup no, you do not have to overclock the system to enjoy your ram at 3000mhz..
Click to expand...

ok, many thanks for the great answer.
 
I'm sorry, I'm quite hard, but can I use 2666MHz, 2800MHz, 3000MHz ram on haswell-e without overclocking the CPU and the system?

Is this possible or a 3000MHz ram requires some overclock to CPU at least?
 
relax, do not worry about that, you do not have to overclock anything to enjoy the RAM at rated speed.. in any case you can increase the BCLK to achieve higher memory speed while overclocking the CPU.. anyway instead of that i would prefer to use 2666mhz or less with tighter timings.. if you buy a 3000mhz RAM you can try using at a lower speed and decrease the timings to avoid the latency issues as it happened with DDR3 at launch...
 
Araxie said:
relax, do not worry about that, you do not have to overclock anything to enjoy the RAM at rated speed.. in any case you can increase the BCLK to achieve higher memory speed while overclocking the CPU.. anyway instead of that i would prefer to use 2666mhz or less with tighter timings.. if you buy a 3000mhz RAM you can try using at a lower speed and decrease the timings to avoid the latency issues as it happened with DDR3 at launch...
Click to expand...

Ok, thanks!!!
I don't know what RAM buy at the moment.
Corsair Dominator Platinum has idiot price, Vengeance LPX is very very very ugly with decent specs, Ripjaws.X4 is quite cool but I don't find any model faster than 2400MHz.
 
Araxie said:
relax, do not worry about that, you do not have to overclock anything to enjoy the RAM at rated speed.. in any case you can increase the BCLK to achieve higher memory speed while overclocking the CPU.. anyway instead of that i would prefer to use 2666mhz or less with tighter timings.. if you buy a 3000mhz RAM you can try using at a lower speed and decrease the timings to avoid the latency issues as it happened with DDR3 at launch...
Click to expand...
This is probably what I would do as well. At those speeds, latency seems like it would bottleneck faster than clock. Then again, I have done zero math to justify that supposition.
 
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