Gráfica AMD RDNA2 (RX 6000 series)

E agora com a questão do Brexit?

Irlanda não faz parte do Reino Unido é um pais independente, faz parte da UE. Não confundir com Irlanda do Norte. Podem mandar vir do site da AMD tranquilamente que não pagam taxas alfandegárias, aliás muitos clientes do Reino Unido têm-se queixado que desde o Brexit a AMD não vende diretamente do site para eles.
 

PowerColor Red Devil Ultimate Radeon RX 6900 XT Review: Speed Demon​


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The PowerColor Red Devil Ultimate Radeon RX 6900 XT has a BIOS switch built-in, accessible just behind the case bracket. The switch enables two modes: OC and Silent, each with different power targets and clocks. In OC mode, the card is configured for a 303W TDP, with Game and Boost clocks of 2,235MHz and 2,425MHz, respectively. In Silent mode, the TDP is scaled back to 272W with a 2,135MHz Game clock target and 2,335MHz Boost clock.
https://hothardware.com/reviews/powercolor-red-devil-radeon-rx-6900-xt-review?page=1


Os franceses da overclocking.com também têm uma review
https://overclocking.com/test-powercolor-rx-6900-xt-red-devil-ultimate/

Baseada nas informaçõpes anteriores a TPU diz que é baseada num "special Bin Super Reserva Bruto"
Update 17:26 UTC: The Red Devil Ultimate is based on AMD's new Navi 21 XTXH GPU, which has the device ID 0x73AF, whereas all existing Navi 21 variants are 0x73BF. There's claims that XTXH is a special bin with better OC potential, lower leakage, etc. Whether that is true is unknown at this time, it's also unknown whether these cards come with truly increased OC adjustment limits in Wattman, or whether a special BIOS/driver is necessary. Next GPU-Z release will add proper detection for Navi 21 XTXH.
https://www.techpowerup.com/280944/powercolor-quietly-outs-radeon-rx-6900-xt-red-devil-ultimate
 
Vi agora uma dessas à venda. Não fosse o preço de quase 2500€, até que pensava duas vezes. É talvez o melhor design da série rx 6xxx na minha opinião :002:
 

GPU Memory Latency Tested on AMD's RDNA 2 and NVIDIA's Ampere Architecture


Today, we have an interesting report coming from Chips and Cheese. The website has decided to measure GPU memory latency of the latest generation of cards - AMD's RDNA 2 and NVIDIA's Ampere. By using simple pointer chasing tests in OpenCL, we get interesting results. RDNA 2 cache is fast and massive. Compared to Ampere, cache latency is much lower, while the VRAM latency is about the same. NVIDIA uses a two-level cache system consisting out of L1 and L2, which seems to be a rather slow solution. Data coming from Ampere's SM, which holds L1 cache, to the outside L2 is taking over 100 ns of latency.

AMD on the other hand has a three-level cache system. There are L0, L1, and L2 cache levels to complement the RDNA 2 design. The latency between the L0 and L2, even with L1 between them, is just 66 ns. Infinity Cache, which is an L3 cache essentially, is adding only additional 20 ns of additional latency, making it still faster compared to NVIDIA's cache solutions. NVIDIA's GA102 massive die seems to represent a big problem for the L2 cache to go around it and many cycles are taken. You can read more about the test here.

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Vi agora uma dessas à venda. Não fosse o preço de quase 2500€, até que pensava duas vezes. É talvez o melhor design da série rx 6xxx na minha opinião :002:

Do que vejo é o mesmo cooler que as Red Devil "normais".

Não é de todo o melhor design. Não tem thermalpads entre o PCB/Backplate que ajuda muito na temperatura das memórias e muitas das zonas do PCB não têm contacto nenhum com o heatsink. Dá a impressão que só estão interessados na temperatura do Core e o resto que se lixe.

Já tive uma 6900XT Red Devil Limited Edition, uma Asrock Phantom e tenho neste momento uma MSI 6900XT Gaming X. Ambas são bastante superiores em termos de cooling geral às Red Devil.

A Powercolor temm um Marketing brutal, o packaging é também muito bom.... mas as gráficas desiludem-me sempre.
 
Do que vejo é o mesmo cooler que as Red Devil "normais".

Não é de todo o melhor design. Não tem thermalpads entre o PCB/Backplate que ajuda muito na temperatura das memórias e muitas das zonas do PCB não têm contacto nenhum com o heatsink. Dá a impressão que só estão interessados na temperatura do Core e o resto que se lixe.

Já tive uma 6900XT Red Devil Limited Edition, uma Asrock Phantom e tenho neste momento uma MSI 6900XT Gaming X. Ambas são bastante superiores em termos de cooling geral às Red Devil.

A Powercolor temm um Marketing brutal, o packaging é também muito bom.... mas as gráficas desiludem-me sempre.
Quando falei em design, referia-me mais à parte estética. Não tinha ideia dessas limitações, por isso é sempre bom saber dessas particularidades por alguém que já teve uma.
 

What AMD Didn't Tell Us: 21.4.1 Drivers Improve Non-Gaming Power Consumption By Up To 72%


AMD's recently released Radeon Software Adrenalin 21.4.1 WHQL drivers lower non-gaming power consumption, our testing finds. AMD did not mention these reductions in the changelog of its new driver release. We did a round of testing, comparing the previous 21.3.2 drivers, with 21.4.1, using Radeon RX 6000 series SKUs, namely the RX 6700 XT, RX 6800, RX 6800 XT, and RX 6900 XT. Our results show significant power-consumption improvements in certain non-gaming scenarios, such as system idle and media playback.

The Radeon RX 6700 XT shows no idle power draw reduction; but the RX 6800, RX 6800 XT, and RX 6900 XT posted big drops in idle power consumption, at 1440p, going down from 25 W to 5 W (down by about 72%). There are no changes with multi-monitor. Media playback power draw sees up to 30% lower power consumption for the RX 6800, RX 6800 XT, and RX 6900 XT. This is a huge improvement for builders of media PC systems, as not only power is affected, but heat and noise, too.

Why AMD didn't mention these huge improvements is anyone's guess, but a closer look at the numbers could drop some hints. Even with media playback power draw dropping from roughly 50 W to 35 W, the RX 6800/6900 series chips still end up using more power than competing NVIDIA GeForce RTX 30-series SKUs. The RTX 3070 pulls 18 W, while the RTX 3080 does 27 W, both of which are lower. We tested the driver on the older-generation RX 5700 XT, and saw no changes. Radeon RX 6700 XT already had very decent power consumption in these states, so our theory is that for the Navi 22 GPU on the RX 6700 XT AMD improved certain power consumption shortcomings that were found after RX 6800 release. Since those turned out to be stable, they were backported to the Navi 21-based RX 6800/6900 series, too.

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And we're well-positioned for further growth as we have tripled our commercial notebook design wins with the largest OEMs this year. In graphics, revenue increased by a strong double-digit percentage year over year and sequentially, led by channel sales growth as revenue from our high-end Radeon 6000 GPUs more than doubled from the prior quarter. We introduced our Radeon 6700 XT desktop GPU with leadership 1440p gaming performance in March and are on track for the first notebooks featuring our leading-edge mobile RDNA 2 architecture to launch later this quarter. We expect Radeon 6000 Series GPU sales to grow significantly over the coming quarters as we ramp production.

Esperemos que isto seja verdade e resulte em mais gráficos no mercado.
Tendo em conta que é uma afirmação feita para os accionistas, tem mais peso e consequência...
 
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