ddr3 ram overclock

[aren332]

I got a 4790k overclocked @4.7ghz which ill probably push further with my new cooler which will soon arrive. The problem is that my ram at 2133 mhz, and there was a significant jump in cpu benchmarks scores compared to 2133 mhz and 1866 mhz (stock speed of my patriot viper iii 2x8 gb ram). The stock timings of my ram are 10-11-10-30 and I got it to 2133 mhz @ 1.615v and 12-12-12-33 timings. I was not able to get the ram stable at 2400mhz with 14-14-14-36 timings and 1.65v, is that normal? Should I just keep pushing the timings and volts until i get it stable @2400mhz? Also will their be a significant cpu speed increase compared to 2400mhz vs 2133 mhz just like 1866mhz vs 2133mhz? What are some recommended timings or voltage for 2400mhz? or even 2666mhz? I do plan to run my system 24/7 and my case has good airflow so the ram doesnt get that hot

[Shimejii]

6 minutes ago, aren332 said:

I got a 4790k overclocked @4.7ghz which ill probably push further with my new cooler which will soon arrive. The problem is that my ram at 2133 mhz, and there was a significant jump in cpu benchmarks scores compared to 2133 mhz and 1866 mhz (stock speed of my patriot viper iii 2x8 gb ram). The stock timings of my ram are 10-11-10-30 and I got it to 2133 mhz @ 1.615v and 12-12-12-33 timings. I was not able to get the ram stable at 2400mhz with 14-14-14-36 timings and 1.65v, is that normal? Should I just keep pushing the timings and volts until i get it stable @2400mhz? Also will their be a significant cpu speed increase compared to 2400mhz vs 2133 mhz just like 1866mhz vs 2133mhz? What are some recommended timings or voltage for 2400mhz? or even 2666mhz? I do plan to run my system 24/7 and my case has good airflow so the ram doesnt get that hot

You really are trying to kill your system arent you lol. 1.65v on the ram? And you want it to run 24/7? You have to make a choice, do you want to have a rock solid stable build to do 24/7, or do you want to tinker and OC and have it be mostly stable.

 

Dont expect THAT much wiggle room on the 4790k, 4.7 ghz is already pretty high for that cpu.

 

I would honestly just stick to 2133 and try to get the timings as tight as possible, or 1800 if the stability worsens.

[RONOTHAN##]

24 minutes ago, aren332 said:

I was not able to get the ram stable at 2400mhz with 14-14-14-36 timings and 1.65v, is that normal?

Depends on the memory IC and your memory controller quality. There's a ton of variables to the point where you could be incredibly lucky you got that far, or it's really weird you can't go any further. I'd guess though that you're probably about at the limit. 

 

24 minutes ago, aren332 said:

Should I just keep pushing the timings and volts until i get it stable @2400mhz?

Voltage maybe, I wouldn't loosen the timings out any further than 14-14-14 to get 2400MT/s to work though. Mess with some of the IMC voltages though, they can help with higher frequency if your CPU is the issue. Personally, I wouldn't go much further as there shouldn't be that much performance uplift since Haswell generally doesn't scale too far with memory clocks. Just mess with the subtimings at this point. 

 

24 minutes ago, aren332 said:

Also will their be a significant cpu speed increase compared to 2400mhz vs 2133 mhz just like 1866mhz vs 2133mhz?

Maybe in very specific benchmarks, but nothing worth writing home about. 

 

19 minutes ago, Shimejii said:

1.65v on the ram? And you want it to run 24/7?

1.65V is XMP voltage for DDR3...

[aren332]

9 minutes ago, Shimejii said:

You really are trying to kill your system arent you lol. 1.65v on the ram? And you want it to run 24/7? You have to make a choice, do you want to have a rock solid stable build to do 24/7, or do you want to tinker and OC and have it be mostly stable.

 

Dont expect THAT much wiggle room on the 4790k, 4.7 ghz is already pretty high for that cpu.

 

I would honestly just stick to 2133 and try to get the timings as tight as possible, or 1800 if the stability worsens.

ive read that 1.75 is safe for haswell specifically. is running the current 1.615v 24/7 safe? I plan to run this platform for max 2-3 years than switch to a much newer platform.

[aren332]

12 minutes ago, Shimejii said:

Dont expect THAT much wiggle room on the 4790k, 4.7 ghz is already pretty high for that cpu.

idk i think i can get it up to 5ghz with my dark rock pro 4? possibly delid the cpu maybe? I js want to squeeze as much performance out of it while keeping it safe to use 24/7