years ago, many would be satisfied if ryzen can reach close to haswell, but they exceeded that. Much improved power consumption. Reading the reviews and youtubes, there seems to be problem with AMD's SMT that causes performance penalties. Synthetics show ryzen do have a lot of raw power, probably poor optimization as mentioned in this thread.
Seeing the rage in reddit, it seems that people overhype themselves, thinking of a fantasy miracle from lackluster bulldozer family to outright crushing/buttkicking ryzen.
can't wait for ryzen cpu and apu in laptops in 2h 2017, planning to replace my c2d laptop.
Hope this time, laptop manufacturers put in a good ryzen chip with above-average to good specifications. As current amd laptops, either have weak cpu versions, single channel ram or low res screen.
The power consumption is better than Intel 8 core parts and even 7700k in certain case which is great. But from the graph can be seen once overclocked, the power consumption shoots
Yeah, in his thread The Stilt claim that pushing over 3.8Ghz is "extremely costly".
QUOTE
The overclocking headroom for the higher-end Ryzen models is rather slim. This was expected due to the relatively high stock frequencies, high-density orientation of the design and the low power targeted manufacturing process used for the Zeppelin die (Samsung 14nm LPP).
As indicated by the Vmin-Fmax curve, Zeppelin's voltage scaling is perfectly linear until 3.3GHz (25mV per 100MHz). The first deviation ("Critical 1") from this linear behavior can be seen at 3.3GHz. The second and the final deviation ("Critical 2") can be seen at 3.5GHz. Beyond this point the voltage scaling is neither linear or recovers even temporarily, and the CPU is requiring higher voltage in increasingly larger steps to scale further.
The ideal frequency range for the process or the design (as a whole) appears to be 2.1 - 3.3GHz (25mV per 100MHz). Above this region (>= 3.3GHz) the voltage scaling gradually deteriorates to 40 - 100mV+ per 100MHz.
This means that at ~3.8GHz pushing further usually becomes extremely costly (power / thermal wise).
In comparison, the "critical" points for the two previous AMD desktop designs were at:
- Orochi Rev. C aka Vishera, 32nm SHP SOI - (1 = 4.4GHz, 2 = 4.7GHz)
The voltage scaling indicated by the Vmin-Fmax curve (above) can be also clearly seen in the default voltages for the different frequency states (PStates) of the CPU.
On the high-end models the actual (effective) voltage for the base frequency (e.g. 3.6GHz on 1800X SKU) can be anything between 1.200 - 1.300V. Meanwhile the actual (effective) voltage for the highest single core boosted PState (XFR, e.g. 4.1GHz) can be as high as 1.47500V.
In the tested sample the actual default voltage for the base frequency (P0, 3.6GHz) was ~1.25000V, while the highest single core boost state (XFR, 4.1GHz) defaulted to 1.4625V.
Neither vendors advertised their max power consumption. TDP means max power dissipation in heat; and TDP will always lower than power consumption.
Most reviewers simply measure the whole system from wall using kill-a-watt which is very close to absolute value if dGPU is absent and highly efficient PSU is used. To actually measure CPU power, you need to measure currents and voltage for each power rails that go into CPU, which I doubt any reviewer would do it.
Ryzen superior frametime/minimum frame in gaming confirmed by these guys. Even Wendell somewhat confirmed that with GTA:V that have microstutter present since day one i'm playing it.
There are a few people starting to put the concern about the bad memory controller on 1700X which made in China because it can't operate RAM at 3200MHz while 1700 which made in Malaysia can operate RAM at 3200MHz easily. P.S. My 1700X can't be overclocked to 4.0GHz at all. 3.9GHz@1.45v only 85% stable. And default settings will just crash without any warning at all.
I thought that's only packaging? Not related to the IMC at all?