Amd rx vega 64 review: a high

The RX Vega 64 is the most powerful Radeon graphics card, but how does it compare against the gaming might of Nvidia’s GeForce?


AMD RX Vega 64 architecture

The AMD Vega architecture represents what it called the most sweeping architectural change its engineers made khổng lồ the GPU thiết kế in five years. That was when the first Graphics bộ vi xử lý Core Next chips hit the market and this fifth generation of the Gcông nhân architecture marks the start of a new GPU era for the Radeon team.

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Fundamental to lớn the Vega architecture, represented here by the inaugural Vega 10 GPU, is the hunt for higher graphics card clockspeeds. The very building blocks of the Vega 10, the compute units, have been redesigned from the ground up, almost literally. These next-generation compute units (NCU) have sầu had their floorplans completely reworked lớn optimise & shorten the physical wiring of the connections inside them.

They also include high-speed, mini memory SRAMs, stolen from the Zen CPUs và optimised for use on a GPU. But that’s not the only way the graphics engineers have sầu benefitted from a resurgent CPU design team; they’ve sầu also nabbed the high-performance Infinity Fabric interconnect, which enables the discrete quad-core modules, used in Ryzen & Ryzen Threadripper processors, lớn talk to lớn each other.


Vega uses the Infinity Fabric lớn connect the GPU core itself khổng lồ the rest of the graphics lô ghích in the package. The đoạn Clip acceleration blocks, the PCIe controller và the advanced memory controller, amongst others, are all connected via this high-speed interface. It also has its own clochồng frequency too, which means it’s not affected by the dynamic scaling and high frequency of the GPU clochồng itself.

This introduction of Infinity Fabric support for all the different ngắn gọn xúc tích blocks makes for a very modular approach to lớn the Vega architecture & that in turn means it will, in theory, be easy for AMD khổng lồ make a host of different Vega configurations. It also means future GPU and APU designs (think the Ryzen/Vega-powered Raven Ridge) can incorporate pretty much any element of Vega they want to with minimal effort.

The NCUs still contain the same 64 individual Gcông nhân cores inside them as the original graphics core next thiết kế, with the Vega 10 GPU then capable of housing up lớn 4,096 of these li’l stream processors. But, with the higher core clockspeeds, & other architectural improvements of Vega, they’re able khổng lồ offer far greater performance than any previous GCN-based chip.

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These NCUs are also capable of utilising a feature AMD is calling Rapid Packed Math, & which I’m calling Rapid Packed Maths, or RPM to lớn avoid any trouble with our US cousins. RPM essentially allows you to vì chưng two mathematical instructions for the price of one, but does sacrifice the accuracy. Given many of today’s calculations, especially in the gaming space, don’t actually need 32-bit floating point precision (FP32), you can get away with using 16-bit data types. trò chơi features, such as lighting & HDR, can use FP16 calculations & with RPM that means Vega can support both FP16 and FP32 calculations as và when they’re necessary.


We’ve seen the first game supporting RPM, và other Vega-supported features, like asynchronous compute, withWolfenstein II: The New Colossus, which seems khổng lồ be rather taken with the RX Vega architecture. The Far Cry 5 developers have also come out in support of RPM, and have sầu made FC5 Vega-friendly too. 3D technical lead, Steve Mcauley, has gone on record stating: “there’s been many occasions recently where I’ve been optimising shaders thinking that I really wish I had rapid packed math available to lớn me right now. means the game will run at a faster, higher frame rate, & a more stable frame rate as well, which will be great for gamers.”

The Vega architecture also incorporates a new geometry engine, capable of supporting both standard DirectX-based rendering as well as the ability lớn use newer, more efficient rendering pipelines through primitive sầu shader support. The revised pixel engine has been updated khổng lồ cope with today’s high-resolution, high refresh rate displays, & AMD have sầu doubled the on-die L2 cabít available lớn the GPU. AMD has also freed the entire cabít to lớn be accessible by all the different ngắn gọn xúc tích blocks of the Vega 10 chip, & that’s because of the brvà new memory cài đặt of Vega.

AMD’s Vega architecture uses the second generation of high-bandwidth memory (HBM2) from Hynix. HBM2 has higher data rates, & larger capacities, compared with the first generation used in AMD’s R9 Fury X cards. It can now come in stacks of up to 8GB, with a pair of them sitting directly on the GPU die, making the memory both more efficient & with a smaller footprint compared to lớn standard graphics chip designs. And that could make it a far more tantalising option for notebook GPUs.


Directly connected with the HBM2 is Vega’s new high-bandwidth cache và high-bandwidth cađậy controller (HBCC). Ostensibly this is likely khổng lồ be of greater use, at least in the short term, on the professional side of the graphics industry, but the HBCC’s ability to use a portion of the PC’s system memory as Clip memory should bare gaming fruit in the future. The idea is that games will see the extended pool as one large chunk of Clip memory, so if tomorrow’s open-world games start lớn require more than the Vega 64’s 8GB you can chuông chồng it some of your PC’s own memory khổng lồ compensate for any shortfall.

“You are no longer limited by the amount of graphics memory you have sầu on the chip,” AMD’s Scott Wasson explains. “It’s only limited by the amount of memory or storage you attach to lớn your system.”

The Vega architecture is capable of scaling right up lớn a maximum of 512TB as the virtual address space available to lớn the graphics silinhỏ. Nobody toàn thân tell Chris Roberts or we won’t see Star Citizen this side of the 22nd Century.

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AMD RX Vega 64 specs

This version of the RX Vega 64 isn’t quite the top-over iteration of the consumer Vega GPU range; AMD has also created a liquid-chilled version with an all-in-one water-cooling unit attached to its metallic shroud. That card is almost identical in specification to lớn this standard RX Vega 64, except from the wetware version gets a higher base clocktốc độ and a much higher boost cloông xã too. And, y’know, is a bit less blowy as well, và pretty tough lớn find.

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