Gigabyte Radeon RX 6900 XT Gaming OC Review 19

Gigabyte Radeon RX 6900 XT Gaming OC Review

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The Gigabyte Radeon RX 6900 XT Gaming OC is the company's first custom-design RX 6900 XT "Big Navi" graphics card. It is positioned a notch below the company's flagship RX 6900 XT AORUS Master and designed for those wanting a simple, air-cooled custom-design RX 6900 XT card to get gaming. The company paired the RX 6900 XT with its latest-generation WindForce 3X cooling solution that made its debut with the NVIDIA RTX 30-series custom cards, and a custom-design PCB by Gigabyte that pulls power from a trio of 8-pin PCIe power connectors. The card also features a moderate factory overclock to sweeten the deal.

The Radeon RX 6900 XT is AMD's flagship graphics card for this generation and tops off a surprisingly fast graphics card series that restores competition to the high-end segment. Along with the RX 6800 series, it debuts the new RDNA2 graphics architecture, which also powers the latest generation of game consoles, meaning optimizing for the architecture is easy since most game studios have a console-first development approach. This is also AMD's first graphics architecture with full DirectX 12 Ultimate readiness, combining real-time raytracing, variable-rate shading, mesh shaders, and sampler-feedback, uplifting the visual experience from standard DirectX 12.

Full real-time raytraced rendering is the holy-grail of 3D graphics, but beyond the capability of today's hardware. It is, however, possible to combine conventional raster 3D graphics with certain real-time raytraced elements, such as lighting, shadows, reflections, global illumination, etc., to significantly improve realism. Even this much raytracing requires enormous amounts of compute power. The most compute-intensive part, ray intersection, is processed by fixed-function hardware AMD calls Ray Accelerators. A by-product of this approach is the vast raster 3D performance uplift over the previous generation, which enables AMD to compete with NVIDIA at the high-end segment.

The Radeon RX 6900 XT is based on the new 7 nm "Navi 21" silicon, the same chip also powering the RX 6800 series, but maxes it out. It gets all 5,120 stream processors, 80 Ray Accelerators, 320 TMUs, and 128 ROPs that are physically present on the silicon. AMD doubled the memory amount over the past generation, giving the card 16 GB of it; however, the memory bus width remains at 256-bit. The company used the fastest JEDEC-standard 16 Gbps GDDR6 memory chips for 512 GB/s memory bandwidth and a new technology it calls Infinity Cache, a 128 MB on-die Level 3 cache that operates at 2 TB/s in conjunction with the GDDR6 memory to improve memory sub-system performance.

The Gigabyte RX 6900 XT Gaming OC features a rather simple design. Its WindForce 3X cooling solution consists of a set of aluminium fin stacks skewered by six copper heat pipes which make indirect contact with the GPU through a copper base plate. Three fans ventilate the heatsink. The fans turn in physically opposite directions of each other, yet guide air onto the heatsink. This has been done to reduce turbulence between the fans and lowers noise output. You also get factory-overclocked speeds of 2285 MHz (maximum boost clock) against the 2250 MHz reference. In this review, we take the card for a spin across our test bed to tell you if it has everything you need if all you want is an RX 6900 XT.

Radeon RX 6900 XT Review Market Segment Analysis
RX Vega 64$400 4096641247 MHz1546 MHz953 MHzVega 1012500M8 GB, HBM2, 2048-bit
GTX 1080 Ti$6503584881481 MHz1582 MHz1376 MHzGP10212000M11 GB, GDDR5X, 352-bit
RX 5700 XT$3702560641605 MHz1755 MHz1750 MHzNavi 1010300M8 GB, GDDR6, 256-bit
RTX 2070$3402304641410 MHz1620 MHz1750 MHzTU10610800M8 GB, GDDR6, 256-bit
RTX 2070 Super$4502560641605 MHz1770 MHz1750 MHzTU10413600M8 GB, GDDR6, 256-bit
Radeon VII$6803840641802 MHzN/A1000 MHzVega 2013230M16 GB, HBM2, 4096-bit
RTX 2080$6002944641515 MHz1710 MHz1750 MHzTU10413600M8 GB, GDDR6, 256-bit
RTX 2080 Super$6903072641650 MHz1815 MHz1940 MHzTU10413600M8 GB, GDDR6, 256-bit
RTX 3060 Ti$8004864801410 MHz1665 MHz1750 MHzGA10417400M8 GB, GDDR6, 256-bit
RTX 2080 Ti$10004352881350 MHz1545 MHz1750 MHzTU10218600M11 GB, GDDR6, 352-bit
RTX 3070$8505888961500 MHz1725 MHz1750 MHzGA10417400M8 GB, GDDR6, 256-bit
RX 6800$9503840961815 MHz2105 MHz2000 MHzNavi 2126800M16 GB, GDDR6, 256-bit
RX 6800 XT$120046081282015 MHz2250 MHz2000 MHzNavi 2126800M16 GB, GDDR6, 256-bit
RTX 3080$11008704961440 MHz1710 MHz1188 MHzGA10228000M10 GB, GDDR6X, 320-bit
RX 6900 XT$155051201282015 MHz2250 MHz2000 MHzNavi 2126800M16 GB, GDDR6, 256-bit
Gigabyte RX 6900 XT
Gaming OC
$155051201282050 MHz2285 MHz2000 MHzNavi 2126800M16 GB, GDDR6, 256-bit
RTX 3090$2000104961121395 MHz1695 MHz1219 MHzGA10228000M24 GB, GDDR6X, 384-bit
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