What's more important: frequency, or latency?

Danbuscus25 · Apr 21, 2014

ok, so i bought some ram with lower cas latency, but also low frequency. its at 1066mhz and has a cas latency of 7. which is more important for gaming, and why? would i see a benefit from 1333 and cas 8, or 1600 and cas 9?

M0j0jojo · Apr 21, 2014

Read this post it should answer ur question
http://www.tomshardware.com/forum/299012-30-latency-speed

Danbuscus25 · Apr 21, 2014

ty

and do you know if it is safe to OC my ram from 1066@cas7 to 1600@cas9 ?

Tradesman1 · Apr 21, 2014

CAn try, Yes, will prob need to add + 0.05 to + 0.1 to DRAM voltage, would try at 1600, 9-9-9-26 1.6 (if current sticks are 1.5) then can try fine tuning from there

Danbuscus25 · Apr 21, 2014

ok, and something i noticed in the bios: the ram is stock rated at 1066 mhz cas 7 1.5v, but in the voltage controlls it has some setting that shows some voltage having to do with ram at 1.6v, idk what the name is and im at school. so, should i leave that alone? also, does overclocking the ram have a chance of hurting the mem controller in my cpu?

Tradesman1 · Apr 21, 2014

What mobo and CPU

Danbuscus25 · Apr 21, 2014

athlon II x2 270, Biostar a960D+

Tradesman1 · Apr 21, 2014

Sort of doubt hitting 1600 but it's possible with your CPU

Danbuscus25 · Apr 21, 2014

ok, ty

Pinhedd · Apr 21, 2014

M0j0jojo :

The conclusion reached in that post is incorrect.

Memory operations are interleaved across multiple DRAM banks. The increase in latency between DDR3-1333 CAS 7 and DDR3-1866 CAS 9 is the result of the real time latency (measured in nanoseconds) remaining constant while the number of bus cycles increases. The bus does not stay idle while waiting for a response, it uses a bank multiplexer to issue commands to other DRAM banks in the mean time. DDR3 has 8 banks per rank to work with with each DIMM typically having two ranks (one on each side). A good DRAM controller can easily keep the IO bus busy nearly 100% of the time as long as the latency remains below a certain bounded value.

Danbuscus25 · Apr 21, 2014

so, do you think i would benefit from using 1333@cas 8 or 1600@cas 9?

Pinhedd · Apr 21, 2014

Danbuscus25 :

It depends which microprocessor you're using. If it supports DDR3-1600 natively then go with DDR3-1600. If it does not support it natively then running it may require some fine tuning.

Tradesman1 · Apr 21, 2014

http://support.amd.com/en-us/kb-articles/Pages/ddr3memoryfrequencyguide.aspx

Danbuscus25 · Apr 21, 2014

well, its the athlon II x2 270 which does support up to 1600.

Danbuscus25 · Apr 21, 2014

so, either the amd website graph is wrong, or my mobo/bios lie to me. however, i have run it at 1600 @cas 7, but it quickly crashed and i had to reset the cmos jumper.

EDIT: ok, i saw that it said that depending on the cpu/mobo it may support faster ram.

Pinhedd · Apr 21, 2014

Danbuscus25 :

The native support for that microprocessor is only up to DDR3-1066. DDR3-1333 and DDR3-1600 may be obtainable with some fine tuning, but there are no guarantees.

Tradesman1 · Apr 21, 2014

1600 generally takes more DRAM and CPU/NB (MC (memory controller)) voltage

What's more important: frequency, or latency?

Dignified

Honorable

Dignified

Legenda in Aeternum

Dignified

Legenda in Aeternum

Dignified

Legenda in Aeternum

Dignified

Champion

Dignified

Champion

Legenda in Aeternum

Dignified

Dignified

Champion

Legenda in Aeternum

Share this page