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 lớn the GPU kiến thiết in five sầu years. That was when the first Graphics Core Next chips hit the market & 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 thẻ 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 and 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 benefitted from a resurgent CPU kiến thiết team; they’ve also nabbed the high-performance Infinity Fabric interconnect, which enables the discrete quad-core modules, used in Ryzen & Ryzen Threadripper processors, lớn talk lớn each other.
Vega uses the Infinity Fabric lớn connect the GPU core itself khổng lồ the rest of the graphics xúc tích in the package. The đoạn phim acceleration blocks, the PCIe controller & the advanced memory controller, amongst others, are all connected via this high-tốc độ interface. It also has its own clock frequency too, which means it’s not affected by the dynamic scaling và high frequency of the GPU clock itself.
This introduction of Infinity Fabric support for all the different xúc tích và ngắn gọn blocks makes for a very modular approach to the Vega architecture and that in turn means it will, in theory, be easy for AMD to lớn make a host of different Vega configurations. It also means future GPU và APU designs (think the Ryzen/Vega-powered Raven Ridge) can incorporate pretty much any element of Vega they want khổng lồ 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 to 4,096 of these li’l stream processors. But, with the higher core clockspeeds, and other architectural improvements of Vega, they’re able lớn 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 khổng lồ avoid any trouble with our US cousins. RPM essentially allows you to vày 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. Game features, such as lighting and HDR, can use FP16 calculations and with RPM that means Vega can tư vấn both FP16 & FP32 calculations as and when they’re necessary.
We’ve sầu seen the first game supporting RPM, & other Vega-supported features, like asynchronous compute, withWolfenstein II: The New Colossus, which seems to be rather taken with the RX Vega architecture. The Far Cry 5 developers have also come out in tư vấn of RPM, và have made FC5 Vega-friendly too. 3D technical lead, Steve sầu Mcauley, has gone on record stating: “there’s been many occasions recently where I’ve sầu been optimising shaders thinking that I really wish I had rapid packed math available to me right now.
The Vega architecture also incorporates a new geometry engine, capable of supporting both standard DirectX-based rendering as well as the ability khổng lồ use newer, more efficient rendering pipelines through primitive shader tư vấn. The revised px engine has been updated khổng lồ cope with today’s high-resolution, high refresh rate displays, & AMD have doubled the on-die L2 cađậy available lớn the GPU. AMD has also freed the entire cađậy to lớn be accessible by all the different xúc tích và ngắn gọn blocks of the Vega 10 chip, & that’s because of the br& new memory thiết lập of Vega.
AMD’s Vega architecture uses the second generation of high-bandwidth memory (HBM2) from Hynix. HBM2 has higher data rates, and larger capacities, compared with the first generation used in AMD’s R9 Fury X cards. It can now come in stacks of up khổng lồ 8GB, with a pair of them sitting directly on the GPU die, making the memory both more efficient and with a smaller footprint compared 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 cađậy & high-bandwidth cabịt controller (HBCC). Ostensibly this is likely lớn be of greater use, at least in the short term, on the professional side of the graphics industry, but the HBCC’s ability khổng lồ 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 video clip memory, so if tomorrow’s open-world games start to require more than the Vega 64’s 8GB you can chuông xã it some of your PC’s own memory lớn 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 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 silicon. Notoàn thân tell Chris Roberts or we won’t see Star Citizen this side of the 22nd Century.
AMD RX Vega 64 specs
This version of the RX Vega 64 isn’t quite the top-kết thúc iteration of the consumer Vega GPU range; AMD has also created a liquid-chilled version with an all-in-one water-cooling unit attached khổng lồ its metallic shroud. That thẻ is almost identical in specification khổng lồ this standard RX Vega 64, except from the wetware version gets a higher base clockspeed and a much higher boost clochồng too. And, y’know, is a bit less blowy as well, và pretty tough to lớn find.
