Question Motherboard VRM - How may Amperes are required for an i5-12600K / 3070 Ti setup?

Dec 3, 2021
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I have almost decided purchasing an Asrock Z690 PG Riptide to fit an i5-12600K on it. My question is quite straightforward:

Are the 55 Amps that this motherboard can handle sufficient to cope with the usage of 12600K to gaming (and video editing)? I am potentially going to OC just the RAM (from std 2133 MHz to the "claimed" 3200 MHz) via the use of an XMP profile, but have no intention to do anything more than that. Could it be the case that this spec/limitation of 55 Amps is going to create a bottleneck (or more importantly instability) in my setup?

If the answer depends on what the rest of my setup is/is going to be, then please see below:

Nvidia 3070 Ti
32 GB Ram DDR4 (Corsair CMK32GX4M2E3200C16)
PSU Corsair RM750x
Samsung NVMe 980 Pro 1TB
1 x 14mm fan
2 x 12mm fans
USB keyboard & mouse

Having used an online PSU calculator, it appears that this setup requires 64 Amps (if I add up all rails). Is tht right, assuming that all components are going to be used at 100% at the same time? - (unrealistic scenario)

Amperage (combined)

+3.3V​
+5V​
+12V​
11.4 A​
9.1 A​
43.5 A​
84 W​
522 W​

Link for the m/b here:
https://www.asrock.com/mb/Intel/Z690 PG Riptide/index.asp#Overview


What is the recommendation to do?

Thanks
 

boju

Titan
Ambassador
55amp capable vrms on motherboard converting 12v to power 12600k is plenty, conversion of amps is done on the motherboard not from psu. 12600k stock consumption of around 150w, that's 12.5 amps. 20amps for 12900k stock of around 240w power draw. Serious overclocking will inflate those numbers but still 55amp vrms should still be enough. You can run whatever speed ram you want.

Total amp requirement from psu also needs to account for external power (pcie) for the graphics card which motherboard's vrm (55a) isn't responsible for.

Psu calculator suggests 43a on 12v rail, that includes graphics card so you'd be looking at that power rating. ie Corsair Rmx 850w supplies 70.8a on 12v rail, not that you'll use that much but 3xxx series do like to spike in power so 850w would be recommended.
 

Zerk2012

Titan
Ambassador
I'm not sure where you get the 55A limit the board has 13 phases.
55A to the CPU would be 660 watts? Crap would fry way before then.

The most the PCI-E lane will provide is 75 watts to the video card.

EDIT the video card power is coming from the power supply.
Your numbers are way off. 5 volt 10A is 50 watts not 500 and something.
 
Last edited:

Zerk2012

Titan
Ambassador
I have almost decided purchasing an Asrock Z690 PG Riptide to fit an i5-12600K on it. My question is quite straightforward:

Are the 55 Amps that this motherboard can handle sufficient to cope with the usage of 12600K to gaming (and video editing)? I am potentially going to OC just the RAM (from std 2133 MHz to the "claimed" 3200 MHz) via the use of an XMP profile, but have no intention to do anything more than that. Could it be the case that this spec/limitation of 55 Amps is going to create a bottleneck (or more importantly instability) in my setup?

If the answer depends on what the rest of my setup is/is going to be, then please see below:

Nvidia 3070 Ti
32 GB Ram DDR4 (Corsair CMK32GX4M2E3200C16)
PSU Corsair RM750x
Samsung NVMe 980 Pro 1TB
1 x 14mm fan
2 x 12mm fans
USB keyboard & mouse

Having used an online PSU calculator, it appears that this setup requires 64 Amps (if I add up all rails). Is tht right, assuming that all components are going to be used at 100% at the same time? - (unrealistic scenario)

Amperage (combined)


+3.3V​
+5V​
+12V​
11.4 A​
9.1 A​
43.5 A​
84 W​
522 W​


Link for the m/b here:
https://www.asrock.com/mb/Intel/Z690 PG Riptide/index.asp#Overview


What is the recommendation to do?

Thanks
I would up the PSU to the 850 watt model.
The board looks decent for a budget board not what I would buy but it should be fine.
Power supply calculators SUX.

EDIT make sure you buy a good CPU cooler as you never listed it.

Your thinking the motherboards vrams powers everything that is not the way it works.
 
Last edited:

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