PCTuning fórum

Things Not Said: Zen 4c Clockspeeds and CPU Core Disclosures

Despite the fact that this is AMD’s first use of a silicon-heterogenous set of CPU cores within AMD’s consumer processors, the company has given the overall matter a relatively light treatment. Because Zen 4c has the same IPC as Zen 4, AMD is treating them as one and the same throughout their marketing and technical disclosures. And while there’s something to be said for keeping things simple for the masses, we none the less have come away from AMD’s briefing with some reservations about the matter – and some concerns about what is not being said.

To tackle the biggest issue first, the big trade-off with Zen 4c is die space for clockspeed. Zen 4c cores clock lower than Zen 4 cores. How much lower? Well, there’s the rub. We don’t know. At least, not with Phoenix 2.

On AMD’s server processors where everything has been entirely above the board and fully detailed, AMD clearly publishes that none of the Zen 4c chips clock higher than 3.1GHz, some 1.3GHz (30%) slower than the fastest Genoa chip (9174F). However, for their consumer chips, the only clockspeeds AMD are disclosing are the max turbo clockspeed – which is for the regular Zen 4 core(s) – and then the base clockspeed for the entire chip. Which, in the case of the fastest 7545U, is 3.2GHz.

Without getting too much into the weeds here, AMD’s server chips have different clockspeed guarantees than their consumer chips. The company essentially guarantees any and every core on a server CPU can hit the same max clockspeed (if not all at once), whereas on the consumer side of matters we have favored cores, where the best couple of cores are allowed to turbo a bit higher.

All of this is to say that, based on AMD’s disclosures thus far, all evidence points to Zen 4c not clocking much above 3GHz – and it’s not supposed to.

del42sa píše: ↑čtv 2. lis 2023, 17:10 poněkud pomalejší než ty Intelácké Gracemonty co běhají až na 4 Ghz

https://www.anandtech.com/show/21111/am ... efficiency

Krteq píše: ↑čtv 2. lis 2023, 20:28

del42sa píše: ↑čtv 2. lis 2023, 17:10 poněkud pomalejší než ty Intelácké Gracemonty co běhají až na 4 Ghz

https://www.anandtech.com/show/21111/am ... efficiency

Četl jsi článek? Tyhle 4c běhají až na 4,9GHz... 3,2GHz je "base" clock

However, for their consumer chips, the only clockspeeds AMD are disclosing are the max turbo clockspeed – which is for the regular Zen 4 core(s)

Dithius píše: ↑pát 3. lis 2023, 08:21 A co?
Na Fedore s DWM a potunenym kernelem to poleti jak blesk