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forum thread Posted by Suryasis • Mar 4, 2025
forum thread Posted by Suryasis • Mar 4, 2025

Minisforum BD790i X3D MoDT (Mobile on Desktop) Mini-ITX SBC (Barebone): Ryzen 9 7945HX3D, 2xDDR5, 2xM.2 Gen5, 2.5G Ethernet @ $559 + F/S

$559

$649

13% off
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Link: https://store.minisforum.com/prod...bd790i-x3d

Coupon: $40 off via MX3D40

Spec:
  • Mini-ITX Form Factor(170x170x1.6mm)
  • Ryzen 9 7945HX3D 16C/32T 2.3 GHz (5.4 GHz Boost, 16MB L2, 128MB L3 Cache)
  • CPU heatsink (120mm fan required) + Active SSD Cooler /w Fan
  • Radeon 610M integrated Graphics
  • DDR5 Dual channel (SODIMM Slots×2, up to 5200 MT/s, 96GB Max)
  • 2x M.2 2280 PCIe 5.0 SSD Slots
  • 1x M.2 2230 Key E Slot for NIC
  • 1x PCIe 5.0 X16 Slot for GPU
  • Ports:
    • 1x USB 3.2 Gen 2 Type-C (Alt DisplayPort 1.4)
    • 2x USB 3.2 Gen 1 Type-A
    • 2x USB 2.0 TYpe-A
    • 1x HDMI 2.0
    • 1x DisplayPort 1.4
    • 1x RJ-45 2.5G Ethernet
    • 1x Line Out
  • FAN/Audio/USB headers
    • 1x 4-pin CPU Fan header
    • 2x 4-pin System Fan header
    • 1x 4-pin SSD Fan header
    • 1x Front Panel Audio Header
    • 1x System Panel Headers
    • 1x USB 3.2 Gen 1 Header
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Deal Details
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About the Poster
Link: https://store.minisforum.com/prod...bd790i-x3d

Coupon: $40 off via MX3D40

Spec:
  • Mini-ITX Form Factor(170x170x1.6mm)
  • Ryzen 9 7945HX3D 16C/32T 2.3 GHz (5.4 GHz Boost, 16MB L2, 128MB L3 Cache)
  • CPU heatsink (120mm fan required) + Active SSD Cooler /w Fan
  • Radeon 610M integrated Graphics
  • DDR5 Dual channel (SODIMM Slots×2, up to 5200 MT/s, 96GB Max)
  • 2x M.2 2280 PCIe 5.0 SSD Slots
  • 1x M.2 2230 Key E Slot for NIC
  • 1x PCIe 5.0 X16 Slot for GPU
  • Ports:
    • 1x USB 3.2 Gen 2 Type-C (Alt DisplayPort 1.4)
    • 2x USB 3.2 Gen 1 Type-A
    • 2x USB 2.0 TYpe-A
    • 1x HDMI 2.0
    • 1x DisplayPort 1.4
    • 1x RJ-45 2.5G Ethernet
    • 1x Line Out
  • FAN/Audio/USB headers
    • 1x 4-pin CPU Fan header
    • 2x 4-pin System Fan header
    • 1x 4-pin SSD Fan header
    • 1x Front Panel Audio Header
    • 1x System Panel Headers
    • 1x USB 3.2 Gen 1 Header

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17 Comments

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Mar 4, 2025
274 Posts
Joined Mar 2011
Mar 4, 2025
lowirve
Mar 4, 2025
274 Posts
Why x3d for minipc, gaming?
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Mar 4, 2025
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Suryasis
Mar 4, 2025
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Our community has rated this post as helpful. If you agree, why not thank Suryasis

Quote from lowirve :
Why x3d for minipc, gaming?
This is not a mini pc, this is a MODT or Mobile on Desktop platform where a mobile cpu is integrated in a standard form factor motherboard. What you see here is a CPU+ mini-itx motherboard+cooling integrated in a single piece. You can use this to build a desktop using normal chassis, power supply, gpu and SODIMM Memory . Advantages are lower power consumption compared to equivalent desktop chip while retaining 90% performance and lower combined cost.
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Mar 4, 2025
1,102 Posts
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Mar 4, 2025
SlickCrayon1512
Mar 4, 2025
1,102 Posts
It really struggles to cool down that beast. They have tried their best the cooling system is nice for its form factor but simply can not consistently cool that beast down good.
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Mar 5, 2025
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Suryasis
Mar 5, 2025
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Quote from SlickCrayon1512 :
It really struggles to cool down that beast. They have tried their best the cooling system is nice for its form factor but simply can not consistently cool that beast down good.
If you add a high quality and high CFM Fan, it runs perfectly fine. Minisforum has restricted the max TFP of the chip to 100W sustained which prevents it for overheating.
Mar 5, 2025
1,692 Posts
Joined Apr 2005
Mar 5, 2025
goibhniu
Mar 5, 2025
1,692 Posts
As much as I like the idea of this, I just can't justify the price. You can get a good B650 board for $200-$250, or a B850 for $250-$300. You can get a 7600X3D for $300, or if you want more cores you can spend $340-$380 and get a 7900X or 9900X.

The gist of it being that for $560 you can get a mini-ITX board and a generally higher performing CPU for the same money, and the board will have much better expandability/more ports.
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Mar 6, 2025
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Suryasis
Mar 6, 2025
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Quote from goibhniu :
As much as I like the idea of this, I just can't justify the price. You can get a good B650 board for $200-$250, or a B850 for $250-$300. You can get a 7600X3D for $300, or if you want more cores you can spend $340-$380 and get a 7900X or 9900X.

The gist of it being that for $560 you can get a mini-ITX board and a generally higher performing CPU for the same money, and the board will have much better expandability/more ports.
7950HX 3D is almost in the same league of the desktop 7950X3D chip and let me know if you use that in a build how you are even coming closer to this price. 7950X3D alonne probably costs more than this whole package. I did not understand your logic of using a lot cheaper and less powerful desktop equivalents and then comparing it with this ,
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Mar 7, 2025
1,692 Posts
Joined Apr 2005
Mar 7, 2025
goibhniu
Mar 7, 2025
1,692 Posts
Quote from Suryasis :
7950HX 3D is almost in the same league of the desktop 7950X3D chip and let me know if you use that in a build how you are even coming closer to this price. 7950X3D alonne probably costs more than this whole package. I did not understand your logic of using a lot cheaper and less powerful desktop equivalents and then comparing it with this ,
Is this mobile CPU really that close in speed to the desktop models, particularly with limited TDP? If so then I stand corrected, but that really seems like a stretch. Just looking at the selection of benchmarks on NotebookCheck it seems to come in somewhere around a 7700X up to a 7900X. There might be some benchmarks where leveraging the extra cores makes it score higher, but outside of useless benchmarks like Geekbench I'm just not seeing it.
Last edited by goibhniu March 7, 2025 at 04:24 AM.
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Mar 7, 2025
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Suryasis
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Quote from goibhniu :
Is this mobile CPU really that close in speed to the desktop models, particularly with limited TDP? If so then I stand corrected, but that really seems like a stretch. Just looking at the selection of benchmarks on NotebookCheck it seems to come in somewhere around a 7700X up to a 7900X. There might be some benchmarks where leveraging the extra cores makes it score higher, but outside of useless benchmarks like Geekbench I'm just not seeing it.
I am not sure which review you have checked but the Notebookcheck review of the 7945HX non 3D model, it scored 70.2 points by combining all their CPU benchmarks, which falls between 75.5 point of desktop 7950X and 68.5 points of 7900X.
https://www.notebookcheck.net/Min...293.0.html

On top of that, this model is having the X3D processor, meaning it will have even superior gaming performance, compared to any non X3D Desktop processors.
Last edited by Suryasis March 7, 2025 at 11:01 PM.
Mar 9, 2025
79 Posts
Joined Aug 2020
Mar 9, 2025
FeistyNose3055
Mar 9, 2025
79 Posts
Quote from goibhniu :
Is this mobile CPU really that close in speed to the desktop models, particularly with limited TDP? If so then I stand corrected, but that really seems like a stretch. Just looking at the selection of benchmarks on NotebookCheck it seems to come in somewhere around a 7700X up to a 7900X. There might be some benchmarks where leveraging the extra cores makes it score higher, but outside of useless benchmarks like Geekbench I'm just not seeing it.
I've use their 7945HX which comes close to the desktop version while only using 55w. My wife plays gotcha games as a F2P and she likes to play multiple accounts through VMs, so I gave her this CPU after the 5900x wasn't enough. Not only does the mobile on desktop run fast, it also never passes 78*C with the CPU fan on a silent curve.
Mar 10, 2025
104 Posts
Joined Feb 2018
Mar 10, 2025
SplendidMeerkat920
Mar 10, 2025
104 Posts
Quote from goibhniu :
As much as I like the idea of this, I just can't justify the price. You can get a good B650 board for $200-$250, or a B850 for $250-$300. You can get a 7600X3D for $300, or if you want more cores you can spend $340-$380 and get a 7900X or 9900X.

The gist of it being that for $560 you can get a mini-ITX board and a generally higher performing CPU for the same money, and the board will have much better expandability/more ports.
The people into MoDT boards are likely eyeing energy efficiency in ways that a desktop motherboard + chipset don't really compete with. I find there's a huge difference between a desktop chip's advertised TDP and how much power a built desktop draws at the wall.
Mar 11, 2025
76 Posts
Joined Nov 2020
Mar 11, 2025
ph00nster
Mar 11, 2025
76 Posts
What spec PCIE slot is that? My SQL box case has a spot for a mini itx board (as a 2nd mobo) and tempted to use it to mount a raid controller and build a NAS box as well as running plex
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Suryasis
Mar 13, 2025
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Quote from ph00nster :
What spec PCIE slot is that? My SQL box case has a spot for a mini itx board (as a 2nd mobo) and tempted to use it to mount a raid controller and build a NAS box as well as running plex
It's a Gen 5X X16 PCIe slot and mentioned in the specification section.
Mar 26, 2025
266 Posts
Joined Apr 2018
Mar 26, 2025
TrevynA
Mar 26, 2025
266 Posts
This is really good power for the money. The downside is that you are much more locked down than if you bought your own 7950x3d, and mini itx motherboard (which would cost more)
Mar 26, 2025
4,930 Posts
Joined Dec 2009
Mar 26, 2025
seanleeforever
Mar 26, 2025
4,930 Posts
my issue with those MoDT is that none of the mini ITX case can fit it due to the cooler mounting options. you then put it in a mid tower, defying the purpose.

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Quote from seanleeforever :
my issue with those MoDT is that none of the mini ITX case can fit it due to the cooler mounting options. you then put it in a mid tower, defying the purpose.
There are plenty of buildfs using mini ITX Cabinets and this motherboard, available on YouTube. If you want, I can point some. It may not fit in some super slim mini-ITX chassis but most will work.
https://www.youtube.com/watch?v=g...l=ETAPRIME

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