Noctua Releases NH-D15 G2 Specific Offset LGA1851 Mounting Bars

[btarunr]

Noctua today presented the new NM-IMB8 offset mounting bars for the award-winning NH-D15 G2 flagship CPU cooler. By offsetting the heatsink 3.7 mm towards the north and 2 mm towards the east side of the socket, more pressure is applied right above the hotspot of Intel 24- or 20-core LGA1851 CPUs, such as the Core Ultra 9 285K or Core Ultra 7 265K. This improved contact exactly at the processor's hotspot can reduce CPU temperatures by up to 3°C with HBC coolers and up to 1°C with the standard version (medium base convexity) of the NH-D15 G2.

"Our NH-D15 G2 has successfully established itself as a new benchmark for premium quality quiet CPU coolers, and we're excited to further improve its performance on 24- and 20-core Intel LGA1851 processors with the new NM-IMB8 mounting bars", says Roland Mossig (Noctua CEO). "By shifting the cooler closer towards the hotspot, LGA1851 owners can edge out up to 1°C using the regular NH-D15 G2 and up to 3°C using the HBC version."



Intel LGA1851 CPUs with 24 or 20 cores such as the Core Ultra 9 285K or Core Ultra 7 265K feature a hotspot location shifted towards the north-east side of the package when running heavy multicore loads. This off-center hotspot location opens the door for cooling performance optimization through shifting the cooler towards the hotspot in order to provide more concentrated contact pressure where it matters the most.

By offsetting the heatsink 3.7 mm towards the north and 2 mm towards the east side of the socket, the new NM-IMB8 mounting bars can reduce CPU temperatures by up to 3°C with HBC coolers and up to 1°C with the standard version (medium base convexity) of the NH-D15 G2. Since the standard version typically performs around 2°C better than the HBC version when both are used without offset, the first remains the recommended choice for LGA1851 as it achieves the best temperatures overall, both with and without offset mounting bars.

Replacing the standard mounting bars and re-using the original spacers and screws, the NM-IMB8 are a simple yet highly efficient measure for fine-tuning the thermal performance of NH-D15 G2 CPU coolers on high core count LGA1851 processors.

The NM-IMB8 mounting bars are available via Noctua's website (as of today) or Amazon (starting in 2-3 weeks) for a service charge of EUR/USD 3.90 (website form) or EUR/USD 4.90 (Amazon) that helps to cover parts of the shipping and handling costs.

Caution: The NM-IMB8 are only compatible with NH-D15 G2 (standard, HBC and LBC models), NH-D12L, NH-L12S, NH-L12Sx77 and NH-L12 Ghost S1 edition heatsinks, please do not purchase for other coolers.

For more information, visit the product page.

View at TechPowerUp Main Site

 

[Chaitanya]

I thought offset mounts were part of standard kit for G2.

 

[tommo1982]

Noctua's mounting brackets are grear. I have NH-L9a-AM4 and it performs better than bequiet! Pure Rock Slim. Possibly due to change in mounting type. I think AMD should've devised a better way to mount coolers to their AM sockets.

 

[ncrs]

I thought offset mounts were part of standard kit for G2.

The included offset mount is for AM5 (and AM4 but Noctua doesn't advertise it due to almost no difference) and a set of washers for LGA 1700. This is a new one for Arrow Lake's LGA 1851.

Noctua's mounting brackets are grear. I have NH-L9a-AM4 and it performs better than bequiet! Pure Rock Slim. Possibly due to change in mounting type. I think AMD should've devised a better way to mount coolers to their AM sockets.

I find the standard AM4/AM5 mount adequate especially for AMD's coolers with a simple lever mounting mechanism.
Looks like bequiet! changed their AM4/AM5 mechanism from single-spring to double-spring in Pure Rock Slim 2, so that might've been a problem:

Bigger bequiet! coolers use a different mechanism similar to Noctua's.

 

[TheDeeGee]

The included offset mount is for AM5 (and AM4 but Noctua doesn't advertise it due to almost no difference) and a set of washers for LGA 1700. This is a new one for Arrow Lake's LGA 1851.


I find the standard AM4/AM5 mount adequate especially for AMD's coolers with a simple lever mounting mechanism.
Looks like bequiet! changed their AM4/AM5 mechanism from single-spring to double-spring in Pure Rock Slim 2, so that might've been a problem:

Bigger bequiet! coolers use a different mechanism similar to Noctua's.

Push pins should be banned!

 

[_roman_]

Nice marketing hoax.

I bought those offset mounting brackets and I had tested them quite a while on am4 / am5 with my second hand noctua nh-d15. I even got the original buy invoice of the seller at that time.
I saw 0 difference in temperatures with noctua thermal paste. Same paste in the 10gramm package.
Noctua cpu tower Coolers are overrated.

I wanted to see myself the difference so I spend those 10€ to test the noctua offset brackets. I tested each platform for several months.

Personal experience from past few days. Noctua does not read texts about existing purchases. I was forced to return my order. The email was not read. I had missing parts in the box. They also sell on amazon.de with a fraudulent company name, although amazon.de claims noctua itself sells the hardware. I also asked them about that fact, but 0 response.

 

[tsunami2311]

Push pins should be banned!

I was gona say same thing last time I had cooler that used was intel crap coolers 20 years ago and I thought they where horrible then

 

[Dr. Dro]

Nice marketing hoax.

I bought those offset mounting brackets and I had tested them quite a while on am4 / am5 with my second hand noctua nh-d15. I even got the original buy invoice of the seller at that time.

These are new and meant for the new second generation D15, which has changes in the heatsink base. They have low, medium and high convexity models now.

 

[_roman_]

Some stuff should be not allowed to be advertised.
Those offset mounts were a scam which Noctua fooled me. thermal paste sometimes is similar.

Thanks to the recent gamers Nexus video on youtube.
Igorslab
I see the thermal paste topic differently.

Those offset mounts + thermal paste + cooler in use are one system.

You may pay attention what Roman said in the gamers nexus video recently about the thermal paste how it behaves from the same mixing "charge".

You may also think about what igor wrote recently in german language about thermal interface medium and the minimum thickness which makes only sense to measure about.

Note: The worst whataboutism i just provided. Noctua makes nice claims but can not deliver on e.g 140mm Fans, offset mounting bracket for my Noctua NH-D15 Generation 1. I came to the conclusion in the past few days to never buy any noctua product again, that also includes my long term partner NT-H1 thermal paste. // Offset bracket can not be looked at alone. It is about the hole system, that includes case, mounting position, dirt on the cpu, dirt on the cooler, surface structure, chemical structure of cpu, chemical structure of the headsink, mounting pressure of the cooler, Thermal interface medium thickness, age of the thermalpaste, type of thermalpaste, .... So many things which can ruin the performance. // the lack to answer any questions after purchase for 80-90€ 140x140x??mm fan purchase, speaks to itself.

I talk about that "offset mounting" noctua bracket, check red number 1.
With the aftermarket Thermaltake socket, I cearly see where the thermal paste was previous when renewing the thermal paste. On both sides, on the cpu side, next to the cpu and on the cooler side.

 

[trsttte]

Some stuff should be not allowed to be advertised.
Those offset mounts were a scam which Noctua fooled me. thermal paste sometimes is similar.

Thanks to the recent gamers Nexus video on youtube.
Igorslab
I see the thermal paste topic differently.

Those offset mounts + thermal paste + cooler in use are one system.

You may pay attention what Roman said in the gamers nexus video recently about the thermal paste how it behaves from the same mixing "charge".

You may also think about what igor wrote recently in german language about thermal interface medium and the minimum thickness which makes only sense to measure about.

Note: The worst whataboutism i just provided. Noctua makes nice claims but can not deliver on e.g 140mm Fans, offset mounting bracket for my Noctua NH-D15 Generation 1. I came to the conclusion in the past few days to never buy any noctua product again, that also includes my long term partner NT-H1 thermal paste. // Offset bracket can not be looked at alone. It is about the hole system, that includes case, mounting position, dirt on the cpu, dirt on the cooler, surface structure, chemical structure of cpu, chemical structure of the headsink, mounting pressure of the cooler, Thermal interface medium thickness, age of the thermalpaste, type of thermalpaste, .... So many things which can ruin the performance. // the lack to answer any questions after purchase for 80-90€ 140x140x??mm fan purchase, speaks to itself.

I talk about that "offset mounting" noctua bracket, check red number 1.
With the aftermarket Thermaltake socket, I cearly see where the thermal paste was previous when renewing the thermal paste. On both sides, on the cpu side, next to the cpu and on the cooler side.

View attachment 399162

Scam? I don't know about AM5 but with AM4 they clearly said the difference would be negligible. You're also using a CPU with a single CCD which will again make any small difference even smaller.

 

[freeagent]

The CPU is a lot smaller than AM4. Looking at how 5x 8mm pipes sit on it vs 7x 6mm pipes.. normally I would say the 8mm pipes, but only 3 cover it, vs 5 on the 6mm pipes.

In my experience, only on Zen 3.. single CCD parts are the easiest to cool. I have a 5600X and 5800X3D. I do not run at stock though.. but my 5900X can do about 120w more than the other two with PBO.