Run memory on 1866mhz with i5-4670k but not overclock

[Time2time]

Motherboard:
<LI class=name style="WIDTH: 325px">GIGABYTE GA-Z87X-UD3H Z87 S-1150 ATX Memory:
KHX1866C9D3K2/8GX 8GB 1866MHz DDR3 Non-ECC CL9 DIMM (Kit of 2) XMP Kingstone

Well, I try to runt the memory on 1866mhz with 1,65v but the processor then overclocks automaticly to 3,8 mhz and i dont want that. I there some bios settings I can change this. I have found a cpu ratio I can put on 34 but then the processor wont do the turbo to 3,8 which it is capable for...
What to do? or do I have to runt this memory om 1333mhz so the processor dont overclock. I also tries to run the memory on 1866 with 1,5v and it seems to work, but the processor then still overclocks to 3,8!.
Is there something to do or is it ok to runt the processor on 3,8... reason I dont want to overclock is that I have stock cooler and running prime it hits around 100degres! and on stock its around 80 to 85 maximum.

Can i make this work or should I buy a cpu cooler and be happy...

 

[Bubbleawsome]

You should buy a new cooler. It's never a bad investment.

 

[Galatian]

I don't quite get your question. On the one hand you say it's Turbo Boost Clock is 3,8 Ghz on the other hand you complain that it automatically "overclocks" to 3,8 GHz when you put faster RAM inside? It seems like normal behavior to me.

Also why did you get a K series chip if you won't overclock?

 

[ShintaiDK]

Using 1866Mhz memory is considered overclocking. Also 1.65V is overvolted and over the spec likewise.

And as galatian said, 3.8Ghz with turbo is normal.

80-85C on stock is fine.

 

[Time2time]

I got the K just because it was on sale and better price compared to the non K. Yes the processor hits 3,8 but it will run constantly on 3,8 f ex when you run prime, but with 1333mhz it will run "just" on 3,6 and just sometimes hit 3,8. My thought is that it would not run on 3,8 just hit this speed sometimes when needed.

 

[ShintaiDK]

I got the K just because it was on sale and better price compared to the non K. Yes the processor hits 3,8 but it will run constantly on 3,8 f ex when you run prime, but with 1333mhz it will run "just" on 3,6 and just sometimes hit 3,8. My thought is that it would not run on 3,8 just hit this speed sometimes when needed.

You might have something called multicore enhancement in your BIOS. Disable that. Alot of boards auto OC the turbomodes per default.

The turbomodes are 4-3-2-2. So with 4 threads, you should max get 3.6Ghz at stock speeds.

 

[BonzaiDuck]

In my case with an ASUS board, I started out setting the hardware "turbo" switch enabled, and the EPU disabled. The manual makes it clear that of the three types of overclock changes -- switch, BIOS AI overclocker, or AI Suite -- the last change to the BIOS prevails. I left my turbo switch on.

All my tests were done by adjusting the BIOS (with TPU enabled) over a month or two. The TPU is always enabled. And the energy saving EIST and C1E were enabled.

So when I was overclocking, I never got the opportunity to see if the processor would idle at 3.4 Ghz (i7-2600K processor), as opposed to 1.6Ghz (under EIST), with a turbo-multiplier overclock to 46. Now I know over the last week's tweaks that it's either 1.6 or 4.6 -- just disabling the EIST won't make it settle at 3.4.

I even went so far -- a year ago -- to purchase the BIOS chip from ASUS for each of two revisions -- just to save myself the angst and trouble over an upgrade. [After some 17 years of downloading and flashing, I had a bad-day-at-black-rock with an NVidia 680i motherboard with RMA 3-week turnaround -- found myself ordering the (PLCC ?) chips. Call me a sissy, but it seems like less tedium and more certitude.]

Supposedly the BIOS upgrade resolved the problem of waking from sleep with PLL Overvoltage enabled. But I seldom let it sleep -- because I don't want it to turn off my TV. And when it did sleep, it would wake OK. So I never upgraded the BIOS.

This has been a most interesting thread for the responses to the OP's question. Most interesting, indeed . . . . Yey-us it ha-us.

 

[nwo]

If you just want to OC the memory to 1866 speeds, without OCing the CPU, all you have to do is enable XMP in bios.

 

[Tweakin]

If you just want to OC the memory to 1866 speeds, without OCing the CPU, all you have to do is enable XMP in bios.

I would suggest you set your XMP for the memory, and manually set your cpu to 3.6 and disable all turbo boost settings. This will limit your cpu to 3.6Ghz max and run your memory at 1866 regardless of cpu speed.

 

[nwo]

I would still definitely look into upgrading your cooler. 80-85 under full load and 100 during extreme stress tests are not safe CPU temps. You can get a decent aftermarket HSF for less than $20.

I picked up this one last week for $13 after MIR.

I also got this one for $10 after MIR about a month ago. Zalman optima actually performs better than I expected, it keeps my i5 3570k OCed at 4.3GHz below 60*C under full (mining) load.

I still haven't received the first HSF I linked... shop runner 2 day shipping is on it's 8th day now :\