Will underclocking memory module improve performance?

[bukaida]

I have two GSkill sniper 4 GB(1600 MHz) with 9-9-9-24-2N.
I am using G3258 on Gigabyte Z97 D3H. Since my cpu doesnot run beyond 1333 MHz, shall I reduce the speed to 1333 and lower the CAS to get better performance? At present I am running in 1600 MHz with XMP enabled. If lowering the frequency in my case increase the performance, then what will be the setting?

 

[Groveling_Wyrm]

Generally, the answer to that is no. Several factors involved, but basically slowing down the RAM, you lose more performance than you would by decreasing the latencies.

 

[bukaida]

But my CPU is running at 1333 and RAM at 1600. So doesn't the entire system running at 1333 MHz with higher latency (9-9-9-24)?

 

[Compuser10165]

Your RAM is running in overclock mode with XMP enabled. If you look at CPU specifications (even for other platforms) you can see they don't support higher speed than 1866mhz DDR3 (ignore the DDR4 platforms for now), but you can still run higher frequency RAM. That means they support the 1866mhz stock speed (without XMP or overclock). So, leave the RAM at 1600mhz.

 

[4Ryan6]

http://www.tomshardware.com/forum/i...r-effect-raised-multiplier-cpu-overclock.html

IMO with a 4.1ghz OC IE. 900mhz increase, you can safely leave your memory where it is, however if you desire to overclock further you can lower your overall CPU load temperature by running the memory at 1333mhz and possibly reach a higher multiplier level.

You could try various 1333mhz settings with that GSkill 1600mhz Sniper Series like, 8,8,8,24 2N @ 1.5v, and if you are hardware lucky possibly (extremely tight for one step down) 1333mhz 7,7,7, 21 2N @ 1.5v, or (looser) 7,8,8,24 2N @ 1.5v you need to stress test those settings, do not assume you're OK just because it may boot to the desktop.

http://www.tomshardware.com/forum/id-2345618/reaching-cpu-overclocking-stability.html

 

[bukaida]

As per your suggesstions, I am better leaving it as it is as I achived the stability after OC the processor with lots of effort. It seems I will not gain much with underclocking.
An off the bit question, Recently intel has launched 6th gen series (Socket 1151) with DDR 4 support in more or less same price range of socket 1150. Just curious whether there is any significant practical improvement compared to the present system ?

 

[Compuser10165]

There would definitely be an improvement for you. As of now, only the unlocked i5 6600k and i7 6700k are released, and they can't really be compared with a dual core pentium.

 

[bukaida]

Actually I was asking about a head to head perfomance in common applications and gaming not bench mark. I mean
a z97 board with DDR3 2400 and a K series i7 5th generation with a Z170a board with DDR 4 and K series i7 6th generation.

 

[Compuser10165]

Actually I was asking about a head to head perfomance in common applications and gaming not bench mark. I mean
a z97 board with DDR3 2400 and a K series i7 5th generation with a Z170a board with DDR 4 and K series i7 6th generation.

Between an i7 4790k (5th gen i7 is a weaker proccesor, cpu wise, but sigificantly more powerful igpu) and an I7 6700k it would br about 8-20% improvement in application (not all application benefit from the increase). Also, Skylake benefits from high clocked DDR4 (3000mhz+) so it also depends on the RAM used in the Skylake platform (Haswell gets little benefits from high clocked ram).