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RX 6900 XT Goes Up Against GeForce RTX 3080 In OpenCL Tests

Radeon RX 6900 XT
Radeon RX 6900 XT (Image credit: AMD)

AMD's Radeon RX 6900 XT officially hits retail shelves on December 8. In the meantime, the Big Navi flagship (via Tum_Apisak) has made a quick appearance on Geekbench 5 to flex its muscles. Take the RX 6900 XT Geekbench 5 numbers with a pinch of salt, as there is currently only a single submission for this card.

Armed with the Navi 21 silicon, the Radeon RX 6900 XT aims to take down the Nvidia GeForce RTX 3090. AMD's offering arrives with 5,120 Stream Processors (SPs) that operate with a 2,105 MHz game clock and 2,250 MHz boost clock. The graphics card's 16GB of GDDR6 memory clocks in at 16 Gbps, which offers a memory bandwidth up to 512GBps across a 256-bit memory interface. The introduction of the 128MB Infinity Cache is suppose to cushion the low memory bandwidth.

In the benchmarks that AMD shared, the Radeon RX 6900 XT ties the GeForce RTX 3090 in 4K performance, but outperforms the Ampere offering at lower resolutions, such as 2560 x 1440. It should be mentioned that AMD's tests with the Radeon RX 6900 XT was with Rage Mode and Smart Access Memory enabled, which likely gave it a small upperhand.

Surprisingly, the latest Geekbench 5 submissions for the Radeon RX 6900 XT show Big Navi being bested by the GeForce RTX 3080.

AMD Radeon RX 6900 XT Benchmarks

Graphics CardGeekbench 5 OpenCLGeekbench 5 Vulkan
GeForce RTX 3090202,869139,439
GeForce RTX 3080177,724126,243
Radeon RX 6900 XT169,77984,797
Radeon RX 6800 XT151,33299,297

As a quick disclaimer, the Radeon RX 6900 XT numbers are from one submission, while the other graphics cards' scores are an average of the entries that users have submitted to Geekbench 5. Primate Labs Inc. updates the metrics daily so the values might differ from one day to the next. As always, we recommend treating the benchmarks with a bit of salt until a thorough review comes out.

The Radeon RX 6900 XT delivered up to 12.2% higher OpenCL performance than the Radeon RX 6800 XT. However, the latter surpassed the Big Navi flagship by up to 17.1% in Vulkan performance. The margins seem plausible, considering that only eight Compute Units (CUs) or 512 SPs separate the two Navi-based graphics cards. Both the Radeon RX 6900 XT and RX 6800 XT are held within the 300W envelope so it stands to reason that a highly factory-overclocked Radeon RX 6800 XT could potentially get within an hairline to a reference Radeon RX 6900 XT.

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Radeon RX 6900 XT

Radeon RX 6900 XT (Image credit: Primate Labs Inc.)
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Radeon RX 6900 XT

Radeon RX 6900 XT (Image credit: Primate Labs Inc.)

When it comes to Ampere, the GeForce RTX 3080 just managed to outwit the Radeon RX 6900 XT by a 4.7% difference in the OpenCL benchmark. The gap in Vulkan performance is reportedly more substantial as the math shows 48.9% higher performance in the GeForce RTX 3080's favor.

At $999, the Radeon RX 6900 XT is a more attractive deal than the GeForce RTX 3090 that's selling for $1,499. The question remains whether AMD's numbers for the Radeon RX 6900 XT are accurate, and if not, how close is the Big Navi flagship to the GeForce RTX 3090. If you think that the stock for the Radeon RX 6800 and RX 6800 XT was bad, the Radeon RX 6900 XT is expected to be even more limited in supply.

  • samopa
    Why would I want the $999 RX6900XT that have both scores lower than $799 RTX3080 ?
    Reply
  • Gurg
    samopa said:
    Why would I want the $999 RX6900XT that have both scores lower than $799 RTX3080 ?
    Because it says AMD on the box and goes to fund Lisa SU's bonus? LOL!

    In actuality with today's extremely limited supply of top 4k capable GPUs, if you have a NEED rather than a want, you probably won't have a choice, but will be faced with buying what is available.
    Reply
  • Makaveli
    samopa said:
    Why would I want the $999 RX6900XT that have both scores lower than $799 RTX3080 ?

    Better to form an opionon over a proper review covering many games and apps just my 2c
    Reply
  • King_V
    The numbers are a bit weird... particularly how the 6800XT manages to outperform the 6900XT in Geekbench 5 Vulkan. Doesn't make any sense.

    And, given that, in gaming, the 6800XT is neck and neck with the 3080, I don't think anyone should be jumping the gun with AMD-bashing/Nvidia-fanboyism just yet.
    Reply
  • purple_dragon
    What gpu to buy really depends on your use case. I use my gpu more for gaming at 4K than productivity so Nvidia's DLSS is a technology that helps at those resolutions for higher frame rates. I do prefer the higher memory amount on the AMD gpu's because I don't want to pay for an RTX 3090 and RTX 3080's 10gb is on the edge of not being enough to load 4K textures in less than a year. I'll probably go with a 3080 but not against a 6800 XT if it's available sooner.
    Reply
  • ingtar33
    considering overclockers are easily getting these AMD cards with stock coolers and little effort to VASTLY outperform the stock settings, I'd say all these benches are junk.
    Reply
  • watzupken
    I actually feel they should stop all these performance metrics on a card that is as rare as shark's toenail. It seems that the card is limited mostly to reviewers to play around and show numbers, but the reality is that you can't get one. So the performance numbers mean nothing.
    Reply
  • watzupken
    purple_dragon said:
    What gpu to buy really depends on your use case. I use my gpu more for gaming at 4K than productivity so Nvidia's DLSS is a technology that helps at those resolutions for higher frame rates. I do prefer the higher memory amount on the AMD gpu's because I don't want to pay for an RTX 3090 and RTX 3080's 10gb is on the edge of not being enough to load 4K textures in less than a year. I'll probably go with a 3080 but not against a 6800 XT if it's available sooner.
    While I agree that DLSS will help claw back performance, you need to be mindful that not all games will come with DLSS support. So far only Nvidia sponsored titles get DLSS. So if you want to play a game that is not exclusive to Nvidia, DLSS may not be able to save you, especially so because the technology is exclusive to Nvidia.
    Reply