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Intel now deactivates AVX-512 capability on new Alder Lake CPUs
And that would be fused on a hardware level. Whilst AVX-512 was not officially supported on the chips, it was useable on Alder Lake on several motherboards.
According to an unnamed source, AVX-512 has been fully disabled in recent editions of Intel's Alder Lake non-K CPUs. This was later confirmed by Intel. "While AVX-512 was not fuse-disabled on select early Alder Lake desktop devices," a company official informed Tom's Hardware, "Intel expects to do so on Alder Lake products in the future."
Most 600-series motherboards later received an upgrade that eliminated official support for AVX512. Surprisingly, several firms attempted to provide partial support via secret BIOS settings. However, this is expected to change shortly, since the revised Alder Lake silicon will no longer have this area of the device physically activated. If you want AVX-512 capability with Intel's latest designs, you'll have to upgrade to its more costly Xeon CPUs. Meanwhile, AMD is said to be adding AVX-512 support to its Zen 4 processors, which is an unusual twist if Intel continues to refuse to support the instructions on consumer devices.
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user1
Senior Member
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Joined: 2016-01-29
Senior Member
Posts: 2338
Joined: 2016-01-29
#5999480 Posted on: 03/09/2022 07:05 PM
It is disabled because Intel wants it to be disabled. The Bios option is only there because motherboard makers did not want to listen to Intel and they found a workaround to activate AVX512.
The hardware is there because the core buildup is a copy - paste from previous generation or because the best chips turns into a Xeon or HEDT for the better paying customers.
This is exactly like my car, I only payed for the 170hp engine but the factory delivers the car with the same hardware as the 200hp version of the engine, because it is cheaper.
The engine is locked to 170hp only by software, so a hobby tuner with a laptop and correct software can just toggle the 170-200hp option to change the engine performance.
I can complain about this, but I do not have a right to complain because I received what I payed for and what was promised.
it is possible to acknowledge "there is no right to complain " ( in the sense that you got what you paid for ) and to criticize a decision that negatively effects the end product at the same time.
You can pretty much guarantee that it isn't a copy paste/leftover as that would be a tremendous waste of die space, as for using those chips in xeons, its possible if not probable.
Generally when we think of hardware/software ecosystems, product segmentation like this is often counterproductive and should be criticized, as it causes problems down the line (disabling avx on pentiums causing software compatibility problems as a form of planned obsolescence for example ) and is generally anti-consumer.
It will be/would be very silly that hypothetically in the future if software requires avx-512, that it will run on icelake and rocket lake, but not alderlake and presumably raptorlake.
It is disabled because Intel wants it to be disabled. The Bios option is only there because motherboard makers did not want to listen to Intel and they found a workaround to activate AVX512.
The hardware is there because the core buildup is a copy - paste from previous generation or because the best chips turns into a Xeon or HEDT for the better paying customers.
This is exactly like my car, I only payed for the 170hp engine but the factory delivers the car with the same hardware as the 200hp version of the engine, because it is cheaper.
The engine is locked to 170hp only by software, so a hobby tuner with a laptop and correct software can just toggle the 170-200hp option to change the engine performance.
I can complain about this, but I do not have a right to complain because I received what I payed for and what was promised.
it is possible to acknowledge "there is no right to complain " ( in the sense that you got what you paid for ) and to criticize a decision that negatively effects the end product at the same time.
You can pretty much guarantee that it isn't a copy paste/leftover as that would be a tremendous waste of die space, as for using those chips in xeons, its possible if not probable.
Generally when we think of hardware/software ecosystems, product segmentation like this is often counterproductive and should be criticized, as it causes problems down the line (disabling avx on pentiums causing software compatibility problems as a form of planned obsolescence for example ) and is generally anti-consumer.
It will be/would be very silly that hypothetically in the future if software requires avx-512, that it will run on icelake and rocket lake, but not alderlake and presumably raptorlake.
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Senior Member
Posts: 490
Joined: 2017-03-01
It is disabled because Intel wants it to be disabled. The Bios option is only there because motherboard makers did not want to listen to Intel and they found a workaround to activate AVX512.
The hardware is there because the core buildup is a copy - paste from previous generation or because the best chips turns into a Xeon or HEDT for the better paying customers.
This is exactly like my car, I only payed for the 170hp engine but the factory delivers the car with the same hardware as the 200hp version of the engine, because it is cheaper.
The engine is locked to 170hp only by software, so a hobby tuner with a laptop and correct software can just toggle the 170-200hp option to change the engine performance.
I can complain about this, but I do not have a right to complain because I received what I payed for and what was promised.