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  1. #1426
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    A minha ideia é saltar para 8c/16t e manter-me nisso um bom tempo, daí apenas salto para 16c/32t, se não não faço mais nada a não ser upgrades e mudanças de plataforma... também tendo em conta que andar a dar o salto para o dobro vai ser sempre saltos caros, terão de ser espaçados no tempo e ajustados ao momento financeiro do je, mas a ideia é aplicar aqui um género de lei de Moore.

  2. #1427
    Master Business & GPU Man Avatar de Enzo
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    E para arrefecer um processador de 3k, um cooler de 400 dolares.
    https://adrenaline.uol.com.br/2019/0...-xeon-w-3175x/
    Ideias sem Nexo e Provas do Tráfico de Hardware
    "que personifica o destino, equilíbrio e vingança divina." Dejá vú. Que cena!

  3. #1428
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    A Intel anda realmente com problemas na produção de processadores mais baratos. Não nos top-end tipo 9700k ou 9900k. Mas nos mais baratos, para portáteis por exemplo. Ando a aguardar a chegada de portáteis com a nova geração de CPU Pentium N5000 e está quieto. Entretanto faz um ano que o CPU saiu e ainda nada no nosso mercado com ele. Incrível. Estou a pensar comprar um Acer Swift 1 mas para já, nem ver esse modelo em Portugal, apenas Alemanha, França, Itália, Inglaterra… Portugal anda ainda com modelos com o Celeron N4000 que é geração anterior… Atraso de vida… É que o novo já tem Wi-Fi Gigabit, Bluetooth 5 entre outras coisas...

  4. #1429
    Moderador Avatar de SleepyFilipy
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    Já no defunto fórum da PCDiga andava lá um utilizador doente da cabeça para que chegassem portáteis com essa configuração, mas ficou a mamar no dedo... Quase copy paste deste teu post xD

    Havendo muita procura lá fora, é certo que o mercado nacional português não vai ser priorizado.

    Enviado de meu Redmi Note 5 usando o Tapatalk
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  5. #1430
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    É apenas porque segundo o que vi é o novo topo de linha dos novos CPU's que não sejam Core. É que assim não gasto tanto. Penso eu que os portáteis com Pentium /Celeron sejam bastante mais baratos que com i3/i5.

  6. #1431
    Moderador Avatar de Winjer
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    A Intel começou com a actuzlização de várias fabricas para os 10nm, mas como estão a ter problemas enormes, o resultado é terem estas fabricas paradas durante meses e meses.
    As fabricas que ainda estão a trabalhar nos 14nm, andam a prioritizar os chips mais caros, o que resulta em escassez no low end para consumo.

  7. #1432
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    Este é o momento para a AMD atacar os segmentos baixos de mercado...

  8. #1433
    Moderador Avatar de Winjer
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    Intel Processor Refresh in Spring - 100 MHz bumps

    Earlier this week you've already read the funny news about a KFC edition, in the upcoming weeks more processors will be added into the lineup from Intel, they, however, all are refreshes mostly 100 MHz increase on the frequency. In the desktop segment, You've already seen the Intel Core i5-9400 / 9400F.
    In retail you can already spot most of the new SKUs listed, for the desktop, processors in the Coffee Lake Refresh will be available as the Core i-9000 processors.
    Similar to the Core i5-9400, most models will be a higher-clocked Coffee Lake, typically 100 MHz more clock. The naming is a little weirder though. If you look at the below overview the Celeron sticks to two cores and two threads, Pentium procs offers at least four of them (two cores + two threads) now going to 4 GHz (Pentium Gold 5260). This is an entry-level Pentium Gold G5260 model is already present in some European stores along with a prominent availability date on March 4th. It is not known which architecture the Pentium Gold G5260 is based on, but according to a current Intel roadmap, this should be Coffee Lake-R. With the Pentium Gold G5260, six additional models are planned: Pentium Gold G5420, Pentium Gold G5420T, Pentium Gold G5600T, Celeron G4950, Celeron G4930 and Celeron G4930T. Pentium models should come in combination with two processor cores and a total of four threads, while two processor cores and two triads are expected in Celeron.
    It is expected that Intel will bring the entire range of new models to market in April. Some of the KF versions can already be found.
    A Intel, mais uma vez a liderar inovação

  9. #1434

  10. #1435
    Moderador Avatar de Winjer
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    SPOILER alert, literally: Intel CPUs afflicted with simple data-spewing spec-exec vulnerability

    Further demonstrating the computational risks of looking into the future, boffins have found another way to abuse speculative execution in Intel CPUs to steal secrets and other data from running applications.
    This security shortcoming can be potentially exploited by malicious JavaScript within a web browser tab, or malware running on a system, or rogue logged-in users, to extract passwords, keys, and other data from memory. An attacker therefore requires some kind of foothold in your machine in order to pull this off. The vulnerability, it appears, cannot be easily fixed or mitigated without significant redesign work at the silicon level.
    Speculative execution, the practice of allowing processors to perform future work that may or may not be needed while they await the completion of other computations, is what enabled the Spectre vulnerabilities revealed early last year.
    In a research paper distributed this month through pre-print service ArXiv, "SPOILER: Speculative Load Hazards Boost Rowhammer and Cache Attacks," computer scientists at Worcester Polytechnic Institute in the US, and the University of Lübeck in Germany, describe a new way to abuse the performance boost.
    The researchers – Saad Islam, Ahmad Moghimi, Ida Bruhns, Moritz Krebbel, Berk Gulmezoglu, Thomas Eisenbarth and Berk Sunar – have found that "a weakness in the address speculation of Intel’s proprietary implementation of the memory subsystem" reveals memory layout data, making other attacks like Rowhammer much easier to carry out.
    The researchers also examined Arm and AMD processor cores, but found they did not exhibit similar behavior.
    "We have discovered a novel microarchitectural leakage which reveals critical information about physical page mappings to user space processes," the researchers explain.
    "The leakage can be exploited by a limited set of instructions, which is visible in all Intel generations starting from the 1st generation of Intel Core processors, independent of the OS and also works from within virtual machines and sandboxed environments."


    The issue is separate from the Spectre vulnerabilities, and is not addressed by existing mitigations. It can be exploited from user space without elevated privileges.
    SPOILER doesn't stand for anything. In an email to The Register, Daniel (Ahmad) Moghimi explained: "We picked a named that starts with 'Sp', since it's an issue due to speculative execution and it kinda spoils existing security assumptions on modern CPUs."
    SPOILER describes a technique for discerning the relationship between virtual and physical memory by measuring the timing of speculative load and store operations, and looking for discrepancies that reveal memory layout.
    "The root cause of the issue is that the memory operations execute speculatively and the processor resolves the dependency when the full physical address bits are available," said Moghimi. "Physical address bits are security sensitive information and if they are available to user space, it elevates the user to perform other micro architectural attacks."
    Memory madness

    Modern processors manage reading and writing to RAM using a memory order buffer to keep track of operations. The buffer is used to perform store instructions – copying data from a CPU register to main memory – in the order they are laid out in executable code, and perform load operations – copying data from main memory to a register – out-of-order, speculatively. It allows the processor to run ahead and speculatively fetch information from RAM into the registers, provided there are no dependency problems, such as a load relying on an earlier store that hasn't yet completed.
    Speculating about a load operation may result in false dependencies if physical address information isn't available. Intel's chips perform memory disambiguation to prevent computation on invalid data, arising from incorrect speculation.
    They just don't do it all that well. "The root cause for SPOILER is a weakness in the address speculation of Intel’s proprietary implementation of the memory subsystem which directly leaks timing behavior due to physical address conflicts," the paper explains.
    "Our algorithm, fills up the store buffer within the processors with addresses that have the same offset but they are in different virtual pages," said Moghimi. "Then, we issue a memory load that has the same offset similarly but from a different memory page and measure the time of the load. By iterating over a good number of virtual pages, the timing reveals information about the dependency resolution failures in multiple stages."


    SPOILER, the researchers say, will make existing Rowhammer and cache attacks easier, and make JavaScript-enabled attacks more feasible – instead of taking weeks, Rowhammer could take just seconds. Moghimi said the paper describes a JavaScript-based cache prime+probe technique that can be triggered with a click to leak private data and cryptographic keys not protected from cache timing attacks.
    Mitigations may prove hard to come by. "There is no software mitigation that can completely erase this problem," the researchers say. Chip architecture fixes may work, they add, but at the cost of performance.
    Intel is said to have been informed of the findings on December 1, 2018. The chip maker did not immediately respond to a request for comment. The paper's release comes after the 90 day grace period that's common in the security community for responsible disclosure.
    Moghimi doubts Intel has a viable response. "My personal opinion is that when it comes to the memory subsystem, it's very hard to make any changes and it's not something you can patch easily with a microcode without losing tremendous performance," he said.
    "So I don't think we will see a patch for this type of attack in the next five years and that could be a reason why they haven't issued a CVE." ®
    Ainda não acabaram os buracos...

  11. #1436
    Moderador Avatar de Winjer
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    Shortage Intel Processor on the Rise - Price Hike Expected

    We've talked a number of times already about the fact that the demand for processors is high and that Intel does not have enough production capacity, especially on the 14nm node. This creates an unbalance in the market, driving prices up.
    It seems to be happening again as shortages of Intel processors are rising again. DigiTimes mentions it in a news article. The forecast is that the new high on shortage will be in the second quarter. A side note is that the impact this round will be bigger as it is expected due to an increasing demand for Chromebooks and light laptops. So the Core i5s was the worst available last year, according to DigiTimes, there would now be a shift to cheaper chips. The Core i3.
    Digitimes Research expects Intel CPUs' supply gap to shrink to 2-3% in the first quarter with Core i3 taking over Core i5 as the series hit hardest by shortages. In the first quarter of 2019, the Core i5 processors featuring Coffee Lake architecture are now having the worst supply shortfall. Some of the demand for Intel's entry-level Atom processors has turned to AMD, while some others have opted for Core i3 processors. The rising demand for Core i3 processors has also started creating tight supply in the market. With demand for Chromebooks to pick up and brand vendors to begin mass shipping their new models all using processors that are in tight supply, Intel CPUs' supply gap is expected to grow 1-2pp sequentially in the second quarter of 2019, with the overall shipments unlikely to see much growth. Intel is expected to have new 14nm capacity join production in the second half of 2019. Intel's existing 14nm fabs are mainly located in the US and Ireland and the newly expanded capacity in Arizona, the US is expected to begin volume production in July or August, to boost Intel's overall 14nm capacity by 25% and completely resolve the shortage problem. Although Intel has announced its 10nm Ice Lake will begin mass production in the second half of 2019, Digitimes Research's sources from the upstream supply chain has revealed that there are still many issues with the CPU giant's mass production schedule for 10nm process.
    Isto são boas noticias para a AMD, com o lançamento do Ryzen 2 a chegar.
    Mas para os consumidores são más noticias, logo agora que o preço das gráficas e memórias estavam a baixar...

  12. #1437
    Tech Bencher Avatar de reiszink
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    Grande salto a nível de iGPU, em teoria 2.5x mais poderoso que o actual.

    Veremos na prática!

    Intel publishes Icelake (Gen11) Integrated Graphics architecture paper - Looks Promising
    Intel i7 5820K - ASRock X99M Killer - 16GB G.Skill DDR4 - Gigabyte GTX 980Ti G1 - Plextor M6e 256GB + Samsung 850 EVO 500GB - Corsair H110 - EVGA G3 750W - Acer 27" 144Hz IPS - Zowie EC2-A - Filco Majestouch 2 TKL - HyperX Cloud II Pro

 

 

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