The starting point of the misery was a mini-ITX build with custom water cooling. All of this is fully in line with the trend, and the fact that EKWB got it this time with the cooler used is just a coincidence. The manufacturer has included an extremely stable backplate in the scope of delivery, which is very praiseworthy in itself, and which is supposed to completely replace the solution installed in the AM4 boards. Unfortunately, the devil is in the details, because you can’t assume that everything fits what the box says it should.
However, we have to defend EK now, because AMD has issued very specific guidelines for these backplates and also communicated them to the motherboard manufacturers. I will at least publish the part from the internal documents (“Processor Platform Thermal Design Guide”) that concerns the description of the backplate, because it is very clear (and has been the same for years):
If we now look at the massive backplate of EKWB’s Velocity², everything still looks good. And don’t be surprised, for the photo this one is turned 180 degrees so that we can also see the recess, which is fully within the standard. So far, so good:
During assembly, there were real problems with one board, because you could already guess from the manufacturer MSI’s backplate that the additional cutouts were not made for weight reasons. We see the MSI backplate on the left and one from Asus on the right, which exactly matches AMD’s specifications. Just like the backplate from EKWB:
The MSI MPG B550I Gaming Edge (Wi-Fi) on the left still houses two voltage converters below the so-called “keep out area”, i.e. an area that AMD refers to as the area to be left free in the motherboard design guides. As long as you can use the original backplate, 3rd party coolers won’t cause any problems with the MSI board, but when a waterblock relies on proprietary but standard backplates, things get tight, very tight:
The last photo shows us how tight (to the point of potential damage) this then becomes:
What do we learn from this? When manufacturers run out of space, they sometimes get creative. Therefore, you should be very careful that the back of the motherboard is compatible with the specifications of the processor manufacturer, especially in the Mini-ITX range, otherwise you might fail with custom backplates. Of course, you can also look at the motherboards on the Internet beforehand, but there are no (official) pictures of the MSI B550i board in particular. A rogue who… 😀
MSI MPG B550I Gaming Edge Max WIFI (7C92-012R)
ASUS ROG Strix B550-I Gaming (90MB14L0-M0EAY0)
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