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The 7840U is the same die as the 7940HS. AMD only did two mobile processor dies this generation; Phoenix 2 is in the Z1 and the larger Phoenix is in the Z1 Extr

The 7840U is the same die as the 7940HS. AMD only did two mobile processor dies this generation; Phoenix 2 is in the Z1 and the larger Phoenix is in the Z1 Extreme, 7840U and 7940HS, among others. So they're doing a lot of product differentiation solely through adjusting power and clock limits, which is confounded by the leeway OEMs have to further adjust those limits.

jauntywundrkind 3y ago
I'm so so curious how much binning there is on modern chips, or whether it's 95%+ just a question of what settings are going to work for a given form factor. Most of the various controls are sitting right there in Linux (or other OS) for power control of CPU & GPU. If cooled, could we just crank a Z1 Extreme up to a 100W core and have it be like a 7940HS? Or is there really some power binning differences? I don't know what AMD charges for their cores. With Intel, there's been a decade of the MSRP of ~$279 for a chip, but the chips coming in a variety of different sizes across the power budgets; you'd pay the same for a tiny ultra-mobile core as you would for a desktop core. What we have now makes that look semi-ridiculous. It's the same chip. Different power budgets.
- scns 3y ago
  > If cooled, could we just crank a Z1 Extreme up to a 100W core and have it be like a 7940HS? I think it shares the die with the 8700G which runs at 65W.
  - jauntywundrkind 3y ago
    These numbers are broadly lies now. Many chips regularly exceed their TDP. Here's Tomshardware's review showing an 81W power consumption for the chip for a cpu only load. https://www.tomshardware.com/pc-components/cpus/amd-ryzen-7-8700g-cpu-review/2 https://www.tomshardware.com/pc-components/cpus/amd-ryzen-7-... And that only begins to dig in. I was asking about overclocking, which is going beyond the base TDPs. Here's the 8700G's 780M gpu hitting 156 watts on overclock, for the same die: https://www.tomshardware.com/pc-components/gpus/amds-radeon-780m-integrated-graphics-hits-315ghz-in-ryzen-7-8700g-overclocking-test-37-faster-on-average-with-igpu-and-memory-overclock https://www.tomshardware.com/pc-components/gpus/amds-radeon-... I highly highly highly encourage blowing away any thinking that a chip says it's TDP is X watts so that's what we'd get. This chip has been seen in the wild drinking vastly vastly more power if given the chance & settings to. I think my question still stands, is there any binning or real difference that would keep a Z1 Extreme from doing similarly? Or are we just bound by how much power we can put in and how much heat we can take away from the Z1 Extremes out there?

jauntywundrkind 3y ago

I'm so so curious how much binning there is on modern chips, or whether it's 95%+ just a question of what settings are going to work for a given form factor. Most of the various controls are sitting right there in Linux (or other OS) for power control of CPU & GPU. If cooled, could we just crank a Z1 Extreme up to a 100W core and have it be like a 7940HS? Or is there really some power binning differences? I don't know what AMD charges for their cores. With Intel, there's been a decade of the MSRP of ~$279 for a chip, but the chips coming in a variety of different sizes across the power budgets; you'd pay the same for a tiny ultra-mobile core as you would for a desktop core. What we have now makes that look semi-ridiculous. It's the same chip. Different power budgets.

scns 3y ago
> If cooled, could we just crank a Z1 Extreme up to a 100W core and have it be like a 7940HS? I think it shares the die with the 8700G which runs at 65W.
- jauntywundrkind 3y ago
  These numbers are broadly lies now. Many chips regularly exceed their TDP. Here's Tomshardware's review showing an 81W power consumption for the chip for a cpu only load. https://www.tomshardware.com/pc-components/cpus/amd-ryzen-7-8700g-cpu-review/2 https://www.tomshardware.com/pc-components/cpus/amd-ryzen-7-... And that only begins to dig in. I was asking about overclocking, which is going beyond the base TDPs. Here's the 8700G's 780M gpu hitting 156 watts on overclock, for the same die: https://www.tomshardware.com/pc-components/gpus/amds-radeon-780m-integrated-graphics-hits-315ghz-in-ryzen-7-8700g-overclocking-test-37-faster-on-average-with-igpu-and-memory-overclock https://www.tomshardware.com/pc-components/gpus/amds-radeon-... I highly highly highly encourage blowing away any thinking that a chip says it's TDP is X watts so that's what we'd get. This chip has been seen in the wild drinking vastly vastly more power if given the chance & settings to. I think my question still stands, is there any binning or real difference that would keep a Z1 Extreme from doing similarly? Or are we just bound by how much power we can put in and how much heat we can take away from the Z1 Extremes out there?