[Manuel Calavera]

Evo pregledao nekoliko recenzija 1800X, u kojoj su tu i tamo uletili 1700x i 1700 u tablicu, ali uglavnom samo prvi. Pcper od A do Ž, zatim Anandtech samo bencheve, imaju uber mega opširnu recenziju koja je još work in progress (kasnije će IPC, te i gaming testirati), zatim guru3d i tomshardware bencheve. Ej kakvih sve benchmarka ima, glava me boli

Prvo čudnovatosti tj. lošija strana priče. Gaming benchmarci su čudni. Recimo u puno sintetičkih benchmarka ryzen ima bolji singlecore score od broadwell-e, no onda u nekim igrama (doduše ne svim) zaostaje primjetno za broadwell-e. A još čudnije je što u takvim situacijama često broadwell-e bude brži i od kaby lake... WTF. Znači nešto tu ne štima. Dali tu treba neki OS update, microcode update, BIOS update, ili update u samom softveru... Evo što kažu o tome:

Pcper:

I’m not sure what to say about these results – I didn’t expect them. But I am hearing other reviewers are seeing very similar results with the same games and other titles as well. It’s possible we are looking at a bug of some kind in the firmware (I’ve heard disabling SMT will improve performance) of it could be a chipset level issue with add-in card performance. We are waiting to hear back from AMD on this but for the last few days I have been away from our test bed.

guru3d

While the results on this page look a lot better, the reality is that the Ryzen 7 1800X should do a notch better. We feel we need to give the Ryzen platform a little more time to develop and tweak on the motherboard manufacturers side as well as giving AMD the time to fine-tune their application software.

Toms hardware:

As mentioned, we encountered lower-than-expected results in many of our game benchmarks. Concerned that the explanation could be related to Windows' handling of P-states, we ran tests on Ryzen under the High Performance and Balanced power profiles as a diagnostic measure. The former is denoted with an HP in our charts. Intel's chips are tested using Windows' Balanced profile, representing the way most of us configure our desktops.

The Zen architecture is AMD's first with simultaneous multi-threading, so we also tested the Ryzen 7 1800X with SMT disabled to flesh out any performance deltas attributable to this feature. Indeed, we observed higher performance with SMT turned off in some titles.

Oni su to nekako najviše istraživali. Znači ima tu nešto, recimo kod stock clocka razlika između najgoreg scorea (bilo razna win power stanja) pa do najboljeg stanja (uglavnom bez smt) je:

- preko 16% u ashesu na 1080p
- battlefield 4 je u pravilu isto, samo win balanced ima zaostatak od 6% naspram ostalih stanja,
- hitman 1080p isto 6%
- project cars 1080p - 11.6%
- metro last light sve ok, 1% razlike

E sad nekad mi se čini da ni taj najbolji score nije gdje bi trebao biti, ako se ravnam prema broadwell-e (tj. da barem bude u njihovom rangu ako nije brži). Znači najbolji ryzen score zostaje za i7 6900K stock u ashesu - nešto ispod 9%, nešto ispod 4% u hitmanu, project cars ispod 15%, u metrou sve OK (ispod 2%)

Oxide games is incredibly excited with what we are seeing from the Ryzen CPU. Using our Nitrous game engine, we are working to scale our existing and future game title performance to take full advantage of Ryzen and its eight-core, 16-thread architecture, and the results thus far are impressive. These optimizations are not yet available for Ryzen benchmarking. However, expect updates soon to enhance the performance of games like Ashes of the Singularity on Ryzen CPUs, as well as our future game releases.” - Brad Wardell, CEO Stardock and Oxide

Uglavnom, gledajući ostale benchmarke, pogotovo one singlecore, ryzen bi trebao imati fps barem kao broadwell-e, ako ne i bolje (ako model ima viši clock), otud vjerojatno i čuđenje autora. Iz zaključka:

We come away from today's coverage with a number of questions that couldn't be answered in time for the launch. For instance, we discovered Ryzen's tendency to perform better in games with SMT disabled. Could this be a scheduling issue that might be fixed later? AMD did respond to our concerns, reminding us that Ryzen's implementation is unique, meaning most game engines don't use if efficiently yet. Importantly, the company told us that it doesn’t believe the SMT hiccup occurs at the operating system level, so a software fix could fix performance issues in many titles. At least one game developer (Oxide) stepped forward to back those claims. However, you run the risk that other devs don't spend time updating existing titles.

The evening before launch, AMD sent us a list of games that it says should perform well with Ryzen, including Sniper Elite 4, Battlefield 1, Star Wars: Battlefront, and Overwatch, among others. Many of the titles tend to be heavily threaded, which would lend itself well to Ryzen's high core count. We plan on revisiting some of those. Further, AMD suggests adjusting several different parameters for games that suffer from low performance. It recommends using Windows' High Performance power profile (which also helps Intel CPUs). It also says to disable the HPET (High Precision Event Timer), either in your BIOS or operating system, to gain a 5-8% advantage. Our results already reflect HPET disabled, though. Interestingly, AMD's Ryzen Master software requires HPET to “provide accurate measurements,” so you may find yourself toggling back and forth for the best experience.

U svakom slučaju gaming performanse će sigurno biti "revisited" od mnogih nešto kasnije. To bi bilo ono najspornije, najgore. A sad ostalo

IPC - baš onakav kakav smo govorili da će biti (treba još izaći IPC testova sa starijim intelovim generacijama od broadwella). Zatim upalite svijeću, AMD je umanjio svoje performanse u nekim slajdovima, rekli su 1800X vs 6900K "about the same" u cinebench singlecore, mislio sam da bi mogao biti manji, no singlecore je bolji (naravno zbog većeg out of the box clocka)

Zatim multithread te potrošnja (naročito idle)
SMT u sintetici, renderingu ubija, te je evidentno bolji od hyperthreadinga

PCper na clock per clock (3.5ghz):

The multi-threaded results are interesting. First, let’s focus on Cinebench R15. While the 7700K easily gets bested by the Ryzen 7 1800X due to a core count doubling, the 6900K result is more intriguing. Remember that the 6900K had an 8% advantage in the single threaded result; this score shows the Ryzen CPU with the 1.5% advantage. Clearly something has made up for the IPC delta between the cores and we are assuming we are seeing improved implementation of SMT and better inter-core communications with cache. (Also interestingly, the 4C 7700K performs at exactly 50% the level of the 8C 1800X, indicating that the same changes and effects are applying.). The same holds true in Handbrake where the Ryzen processor is faster than the 6900K, even if by a small amount.

Onaj dečko što je rekao da mu treba za POV-ray može AMD-u platiti misu




Efikasnost je odlična. Naravno ne za one koji su mislili reklamirani TDP = potrošnja
Uspjeli su ostati par watta iza broadwell-e i sa porastom clocka (naravno ništa bitno, simbolično), ali nisu lagali na prezentaciji, a najjači forte im je idle potrošnja (skoro duplo manje od broadwell-e, čak i manje od skylake/kaby). Ja sam očekivao da će to prebacivati broadwell-e uz povećanje clockova i u nezavisnom testiranju



Inače ako netko traži objašnjenje, smisao u takvom označavanju tdp-a:

One area of interest is the TDP ratings. AMD and Intel have very different views on how this is calculated. Intel has made this the maximum power draw of the processor while AMD sees it as a target for thermal dissipation over time. This means that under stock settings the Core i7-7700K will not draw more than 91 watts and the Core i7-6900K will not draw more than 140 watts. And in our testing, they are well under those ratings most of the time, whenever AVX code is not being operated. AMD’s 95-watt rating on the Ryzen 1800X though will very often be exceed, and our power testing proves that out. The logic is that a cooler with a 95-watt rating and the behavior of thermal propagation give the cooling system time to catch up. (Interestingly, this is the philosophy Intel has taken with its Kaby Lake mobile processors.)

The measured idle power consumption of our ASUS Crosshair VI Hero motherboard and the Ryzen R7 1800X is amazingly low, beating out even the Intel Kaby Lake parts by about 10 watts. While that wouldn’t normally be a big deal, considering the SYSmark 2014 SE power consumption results, Ryzen might find a home in many-user businesses because of it. Under a full load, in this case Cinebench R15, the 1800X requires 33 watts more power to get the job done when compared to the 7700K system. In fact, despite the 95 watt TDP, the Ryzen CPU uses about the same power as the 140 watt Broadwell-E processors. We have already discussed the logic behind this difference, but now you can see it in practice. This also proves that having cooling above and beyond the “base” level for AMD Ryzen TDP levels is going to be a positive.