ram effecting cpu temps?

[nialbu91]

So I recently tightened the timing on my ram, Corsair Vengeance LPX 3000C15. stock is 15-17-17-35 2T. I got it down to 15-16-16-32 1T. I know its not much, but its a start. My question is, should making these changes effect my cpu temps? After making those changes, my 7700k is idling a few degrees hotter and has spikes in the mid 70's on start up and watching youtube. It's never done that before. Is it making the memory controller work harder or something? I havent change the speed that the ram runs at. I never enabled XMP, I just punched in the speed, timings, voltage that were on the sticks and in CPUID.

 

[terry4536]

I would not think that minor change in the timing would have much of an effect at all. You are certainly
OK with entering the memory timings manually. But I would give XMP a try. It is much easier.

Overclocking the RAM does increase the demand upon the memory controller of the motherboard. But that would have little or no effect on the CPU temperatures. That is more likely an accumulation of dust in the heat sink and fans. The CPU cooler bracket may have come loose. Or a a fan may beginning to fail.

 

[nialbu91]

I would not think that minor change in the timing would have much of an effect at all. You are certainly
OK with entering the memory timings manually. But I would give XMP a try. It is much easier.

Overclocking the RAM does increase the demand upon the memory controller of the motherboard. But that would have little or no effect on the CPU temperatures. That is more likely an accumulation of dust in the heat sink and fans. The CPU cooler bracket may have come loose. Or a a fan may beginning to fail.

I hit my AIO with a can of air about once every week or two and make sure everything is tight. the first time I used XMP, it made my system unstable somehow, thats why I had to enter everything manually(though now, after a series of blue screens, XMP is working fine...) I'm not worried about it now. I decided to do a few upgrades, so my original question is irrelevant. thanks for replying though.

 

[terry4536]

I would not think that minor change in the timing would have much of an effect at all. You are certainly
OK with entering the memory timings manually. But I would give XMP a try. It is much easier.

Overclocking the RAM does increase the demand upon the memory controller of the motherboard. But that would have little or no effect on the CPU temperatures. That is more likely an accumulation of dust in the heat sink and fans. The CPU cooler bracket may have come loose. Or a a fan may beginning to fail.

I hit my AIO with a can of air about once every week or two and make sure everything is tight. the first time I used XMP, it made my system unstable somehow, thats why I had to enter everything manually(though now, after a series of blue screens, XMP is working fine...) I'm not worried about it now. I decided to do a few upgrades, so my original question is irrelevant. thanks for replying though.

If you have dust filters on all of your intakes, that really cuts down on the maintenance of your heat sinks (or radiators). I have to clean those filters about once a month. It is surprising just how much dust that they pick up. The internal fans pick up some dust but not much. The heat sink gets cleaned about once a year. I just doesn't seem to get that dusty.

So if you are cleaning the radiator that much, I would invest in some dust filters for all of the intakes. And if you shut your system down much, put the dust filters on the top fan ports too. For case without filters the magnetic filters will work. Unfortunately for mesh cases there isn't much tah can be done dust wise.

 

[Karadjgne]

Yes ram changes affect cpu temps. The memory controller is part of the cpu, so tightening timings or changing speeds higher than a 1:1 ratio of the MC will jack up the temps. Also using 4x sticks vrs 2 will add more heat as the MC will usually add voltage to help with stability.

Lga775 was the last to use mobo mc, with Sandy-Bridge Nehalem cpus the MC was moved to the cpu. Basically anything Core i3, i5, i7 is cpu MC.

 

[nialbu91]

I would not think that minor change in the timing would have much of an effect at all. You are certainly
OK with entering the memory timings manually. But I would give XMP a try. It is much easier.

Overclocking the RAM does increase the demand upon the memory controller of the motherboard. But that would have little or no effect on the CPU temperatures. That is more likely an accumulation of dust in the heat sink and fans. The CPU cooler bracket may have come loose. Or a a fan may beginning to fail.

I hit my AIO with a can of air about once every week or two and make sure everything is tight. the first time I used XMP, it made my system unstable somehow, thats why I had to enter everything manually(though now, after a series of blue screens, XMP is working fine...) I'm not worried about it now. I decided to do a few upgrades, so my original question is irrelevant. thanks for replying though.

If you have dust filters on all of your intakes, that really cuts down on the maintenance of your heat sinks (or radiators). I have to clean those filters about once a month. It is surprising just how much dust that they pick up. The internal fans pick up some dust but not much. The heat sink gets cleaned about once a year. I just doesn't seem to get that dusty.

So if you are cleaning the radiator that much, I would invest in some dust filters for all of the intakes. And if you shut your system down much, put the dust filters on the top fan ports too. For case without filters the magnetic filters will work. Unfortunately for mesh cases there isn't much tah can be done dust wise.

I have dust filters. Its more of an OCD thing lol. I have dust filter on the bottom, front, and top. My air flow is bottom/front ->rear/top. I have the Phanteks Enthoo Pro Series PH-ES614P_BK case. I'm gonna buy either the corsair h500 mid tower or Meshify C soon though.

 

[terry4536]

Yes ram changes affect cpu temps. The memory controller is part of the cpu, so tightening timings or changing speeds higher than a 1:1 ratio of the MC will jack up the temps. Also using 4x sticks vrs 2 will add more heat as the MC will usually add voltage to help with stability.

Lga775 was the last to use mobo mc, with Sandy-Bridge Nehalem cpus the MC was moved to the cpu. Basically anything Core i3, i5, i7 is cpu MC.

But he just changed the timing from 15-17-17-35 2T to 15-16-16-32 1T. He didn't change the frequency at all. I wouldn't think that would change the CPU temperature.

 

[Karadjgne]

Sure it will. The timings are all about speed. Speed of how fast things are opening or closing. All that equates to work. The faster something works, the hotter it gets, the more voltage is required, the more the voltage is used.

If you took a virgin pc with brand new ram and that's what you ran, those are the temps. So if op had started out with ram at the tighter timings, he'd not see a difference. But he started out with slower timings, so he'll see the difference, especially at idle where workloads are somewhat stable.

 

[terry4536]

Sure it will. The timings are all about speed. Speed of how fast things are opening or closing. All that equates to work. The faster something works, the hotter it gets, the more voltage is required, the more the voltage is used.

If you took a virgin pc with brand new ram and that's what you ran, those are the temps. So if op had started out with ram at the tighter timings, he'd not see a difference. But he started out with slower timings, so he'll see the difference, especially at idle where workloads are somewhat stable.

Perhaps it is a matter of degree (pun intended). When I first built this system (with a Noctua NH-D14 cooler). My idle CPU temperatures were 27-29 C. After applying the XMP it was still 27-29 C. How do I remember that? Because until in installed the GTX 970 it rarely even hit 30 C. I just checked it again. It is 32 C (probably dusty).


My point being, I've never noticed much change in the CPU temperature even with populating all four dimm slots.

 

[Karadjgne]

I5-3570k, 16Gb Patriot ram @1.65v. Corsair h55 120mm AIO. 9-10-9-27 2T @1600MHz. Idle 31°C
Changed timings to 8-9-8-24 1T @1600MHz. Idle 32°C. Bumped speed to 2100MHz. Idle 34°C.

I7-3770K, 16Gb Patriot Intel Masters @1.5v. Nzxt Kraken X61 280mm AIO. 10-11-10-30 1T@1866MHz. Idle 31°C. Changed timings to 9-10-9-27 1T. Idle 31°C. Changed speed to 2400MHz @10-11-10-30 1T. Idle 32°C.

Fans on both coolers did not change rpm, temps being still below setpoint of fan curve start.

Conclusion: cooling capability compensated for heat output at idle. On something less capable than the NH-D14, there's a good chance you'd have noticed a bump in temps.