CPU runs hotter after motherboard swap

[fastcar123]

I finally got around to upgrading my motherboard from a MSI Tomahawk B350 to a Gigabyte AX-370 Gaming 5.

 

This system runs well and stable with my Ryzen 7 1700 OC running at 3.9GHz and my memory at its advertised 3000MHz speed.

 

One thing I cant figure out is that this motherboard makes my CPU run about 15C hotter.

I've gone from around 35C idle to 50-54C at idle. 

Under full load in aida64 it reaches in the high 60s.

 

I understand these temps aren't that hot but I still don't get it, plus now the fans are always ramped up due to the heat. 

There is a solid delta of 15C on average.

 

Whats even more strange is that the settings from both boards are the same.

100MHz BLCK 

39 Multiplier

3.9GHZ OC on all cores

1.35V locked

Artic Silver 5

BeQuiet! Dark Rock TF CPU cooler

 

The only difference between the two boards is ram speed with the MSI only getting to 2667MHz,

 

I can confirm that the Voltage is correct and the core clock is correct using HW monitor.

I actually went as far as to remove my CPU cooler and reapply thermal paste 3 times. Each time I removed the cooler, the paste was spread evenly over the IHS.

 

I'm quite confused as to why this is happening.

Can RAM speed affect a CPU temp or is there something else going on here that I am not aware of?

 

[AskTJ]

Ram speed should not be affecting your processor temperatures. Is the CPU cooler mounted properly? Take it off and put it back on, to make sure it is make proper contact with the IHS on the CPU. If that doesn't solve the issue, replace the thermal paste if you haven't already.

[hconverse02]

That's not hot. You are fine and if you have 60C in aida stress testing after an overclock, I'd be very happy with that.

[fastcar123]

1 minute ago, AskTJ said:

Ram speed should not be affecting your processor temperatures. Is the CPU cooler mounted properly? Take it off and put it back on, to make sure it is make proper contact with the IHS on the CPU. If that doesn't solve the issue, replace the thermal paste if you haven't already.

I have done this already 3 times. Each time I do it I remove the cooler to find a nice even spread on the IHS

[fastcar123]

 

1 minute ago, hconverse02 said:

That's not hot. You are fine and if you have 60C in aida stress testing after an overclock, I'd be very happy with that.

I am happy with the temps. No problem there. I am just curious as to why this has occurred. 

Furthermore the system is load with fans always running at high speeds like that. I would imaging if i adjust the fan curve to make it quieter then it would just be hotter

[Streetguru]

14 minutes ago, fastcar123 said:

I can confirm that the Voltage is correct and the core clock is correct using HW monitor.

Did your original board break? Because it really won't do anything changing from B350 to X370 for performance...
 

Unless you can physically check the voltage with a multi-meter, software voltage is not always correct So it might be that the actual voltage is higher than before.

Although with the better VRM  you should be able to drop your voltage maybe at the same clocks. Probably doesn't matter too much though.
 

 

[asand1]

It's possible that your old Mobo couldn't deliver that Amps that your CPU was capable of pulling.

[fastcar123]

29 minutes ago, Streetguru said:

Did your original board break? Because it really won't do anything changing from B350 to X370 for performance...
 

Unless you can physically check the voltage with a multi-meter, software voltage is not always correct So it might be that the actual voltage is higher than before.

Although with the better VRM  you should be able to drop your voltage maybe at the same clocks. Probably doesn't matter too much though.
 

 

I was actually not aware that this was a limitation with software monitoring. As a result I am running aida64 with the cpu voltage turned down. Tying to find a stable of voltage. Though I must say that even the lower voltages didn't really help  heat that much. Just a couple degrees.

The old board didn't break. I got the new board for better vrm and to run memory at advertised speeds. But most importantly I got it because it was on sale on Amazon. Lol

 

24 minutes ago, asand1 said:

It's possible that your old Mobo couldn't deliver that Amps that your CPU was capable of pulling.

If that were the case, wouldn't my overclock have failed?

[asand1]

3 hours ago, fastcar123 said:

If that were the case, wouldn't my overclock have failed?

Not if it was stable. You set a stable overclock as high as the VRMs would allow. Now you might be able to go higher and still be stable. Don't confuse voltage with amperage. 

[asand1]

I can't explain the higher idle temp other than a different fan profile possibly, but my X5680 in a Sabertooth X58 pulls 8.89A at idle and 44.44A at load with CPUz stress test.

[cowpker4life]

As others said maybe taking more lower could also be the llc is different.

[fastcar123]

6 hours ago, asand1 said:

Not if it was stable. You set a stable overclock as high as the VRMs would allow. Now you might be able to go higher and still be stable. Don't confuse voltage with amperage. 

There is something that that for sure. The old board wouldn't post at 4GHz but this one I can get all the way to Windows. I still can't actually run it at 4Ghz but it was crazy that it even posted