News Gigabyte quietly disables Gen5 PCIe 5.0 GPU support on B650 motherboards in F35 BIOS update — Stay on F34 if you value the unofficial PCIe 5.0 support

[Admin]

Gigabyte has removed unofficial PCIe 5.0 support from its B650 motherboards in the latest BIOS update, citing stability concerns. While PCIe 4.0 remains sufficient for most GPUs, the move highlights AMD’s strict chipset segmentation and could signal similar changes from other vendors.

Gigabyte quietly disables Gen5 PCIe 5.0 GPU support on B650 motherboards in F35 BIOS update — Stay on F34 if you value the unofficial PCIe 5.0 support : Read more

 

[Unolocogringo]

Everyone who bought it should now get a refund.

 

[txfeinbergs]

Why? It was never advertised as a feature.

 

[hotaru251]

if it was merely "stability" they could of easily kept it as an option, but defaulted to 4.0 & warned of stability issue if toggled 5.0


This is 100% removing a desired feature from a cheaper tier MB.

While PCIe 4.0 remains sufficient for most GPUs, the move highlights AMD’s strict chipset segmentation and could signal similar changes from other vendors.

5060 runs 8x of 5.0
there is actual testing that shows a 10%(ish) loss of performance by using it in a 4.0 slot over 5.0

This efefctively means your new & future gpu are all being gimped until you upgrade MB. The MB is one of the parts that "Should" last multiple gpu upgrades.

 

[UnforcedERROR]

Everyone who bought it should now get a refund.

If you wanted PCI 5.0 you should've been looking at the B650E or X670E. It wasn't an advertised feature, per the article.

This is 100% removing a desired feature from a cheaper tier MB.

Except that feature was never supposed to be there to begin with. As stated in the article:

"Interestingly, Gigabyte never officially advertised PCIe 5.0 support for B650 motherboards. AMD’s specifications clearly limit full PCIe 5.0 capability to the B650E and X670E chipsets."

The dichotomy of cheaper boards is they are supposed to have less features. This feels like false outrage.

 

[hwertz]

I doubt it's a lower quality PCB (given the article saying some boards have an identical PCB between 650 and 650E boards... plus they wouldn't deliberately use uneven lengh traces would they?) Or components other than the 650 itself not being stable at Gen 5 speeds. I personally would prefer stability over gaining like 3FPS in CP2077 personally.

 

[Alvar "Miles" Udell]

While PCIe 4.0 x16 is more than enough for modern GPUs, issues can arise when bandwidth is halved to x8, which can significantly impact performance on low-end cards like the RTX 5060 Ti.

Shouldn't there be an "even" between "performance" and "on"?

 

[bit_user]

5060 runs 8x of 5.0
there is actual testing that shows a 10%(ish) loss of performance by using it in a 4.0 slot over 5.0

That's only in extreme corner cases. Average performance difference should be only 1-2% and even less than that, in some games.

We are thrilled to report that running the GeForce RTX 5060 Ti with PCI-Express 4.0 x8 has an insignificant impact on performance. Averaged across all game tests, we see a 2% drop in FPS at 1080p, and an even smaller 1% drop at 1440p. While not exactly relevant to this GPU, even 4K Ultra HD posts only a 1% drop in performance with PCIe Gen 4 x8. This should be fantastic news for everyone who has the latest processors (Intel 12th Gen or later, AMD Ryzen 5000 or later), but with a motherboard that only supports Gen 4 on the main x16 PEG slot.

Source: https://www.techpowerup.com/review/nvidia-geforce-rtx-5060-ti-pci-express-x8-scaling/31.html
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This efefctively means your new & future gpu are all being gimped until you upgrade MB. The MB is one of the parts that "Should" last multiple gpu upgrades.

PCIe 4.0 x16 is fine, even for a RTX 5090.

PCI-Express 4.0 x16 ... the RTX 5090. We are happy to report that performance loss in this mode is well contained, and you lose about 1% performance, across all three resolutions.

Source: https://www.techpowerup.com/review/nvidia-geforce-rtx-5090-pci-express-scaling/33.html
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FWIW, I have an ASUS B650 board which never had PCIe 5.0.

 

[bit_user]

I doubt it's a lower quality PCB (given the article saying some boards have an identical PCB between 650 and 650E boards... plus they wouldn't deliberately use uneven lengh traces would they?) Or components other than the 650 itself not being stable at Gen 5 speeds.

In the case of identical PCBs, I'd agree that it makes no sense. I'd guess why the cheaper boards don't support it is that they use fewer layers and lower-spec PCIe retimers.

I personally would prefer stability over gaining like 3FPS in CP2077 personally.

Not sure where the article got the figure of 3-5 fps, but the biggest difference is at 1440p and that's just 1.8 fps (a reduction of 2.3% from PCIe 5).

Source: https://www.techpowerup.com/review/nvidia-geforce-rtx-5060-ti-pci-express-x8-scaling/9.html
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The effect is even less at 1080p and 4k, making me wonder how noisy their measurements are.

 

[Amdlova]

The first Bios on my asrock H670 the Nvme from cpu support Gen 5.0
Never tried to use. Gigabyte motherboards are so f. IF You don't look right they will push everything at Gen 3

 

[techfreak]

Remind me of the days of Gigabyte Z68 Debacle they say such boards support PCIE Gen 3
by BIOS update.
Some don't agree and now similar issue resurface guess Gigabyte is back to their dirty tricks.

 

[bit_user]

Remind me of the days of Gigabyte Z68 Debacle they say such boards support PCIE Gen 3
by BIOS update.

More recently than that, when AMD added PCIe 4.0 support in Zen 2, they said the previous generation boards would automatically get promoted to have PCIe 4.0 support in the CPU-direct slots. Then, they had to walk it back, since not all of those boards were sufficiently well-designed.