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We tested the Radon RX 7900 XTX! AMD’s response to the RTX 4080

We tested the Radon RX 7900 XTX!  AMD's response to the RTX 4080

AMD’s presentation, to which we were invited to Vegas, clearly shows that the new Radons will compete fiercely for players’ wallets. The increase in performance and new functionality definitely deserves the name of a new generation, and at the same time does not force us to completely replace the PC.

At 9:00 a.m. local time, we had our first chance to admire Dr. Lisa Su with senior engineers who introduced the latest generation of gaming graphics cards – the AMD Radeon 7000 models. As of today, there are only two major models confirmed and introduced – the Radeon RX 7900. The XTX, at $999, and the Radeon RX 7900 XT, at $899, immediately puts them in competition with the previously announced GeForce RTX 4070 ($899) and possibly the RTX 4080 ($1199). With the only slight difference the Radeon’s performance promises to be much higher than we can expect from a GeForce (for now) at a similar price.


Dr. Lisa Su introduces the latest GPU Live – AMD RDNA 3 with Radeon RX 7900 XTX

AMD introduces chipset architecture for its new cards

For several years now, the modular architecture of the chip has allowed AMD to provide incredible performance gains while maintaining rational power consumption and production cost at the level of x86 processors (AMD Ryzen). Now the same patent goes to AMD graphics systems with the RDNA 3 architecture. Thanks to this solution, it was possible to create a block of execution units in the latest 5 nm technological process, while the less demanding memory controllers for this block are included in the chipset technology, use of the 6 nm process.

Dr. Lisa Su introduces the new RDNA 3 GPU
The latest RDNA 3 is in the hands of our editor

The top currently offered Radeon RX 7900 XTX uses five such memory modules (one of the six visible in the graphics remains “empty”), which allows us to conclude that we will see a more powerful version of the RDNA 3 chip, possibly in the same series. The memory used by the new Radeons is still the bone of GDDR6, but this time it’s backed by the much faster AMD Infiniti Cache 96MB cache for the higher-end model (80MB for the XT model). The All-New AMD Card Delivers 61 TFLOPS Level Computing Performance! This means 20% higher performance than the 20% more expensive RTX 4080, but at the same time 25% less performance than the elusive AMD (and costs 50% more…) RTX 4090.

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New AMD Radeon RX 7900 Cards Specifications

Model AMD Radeon RX 7900 XTX AMD Radeon RX 7900 XT AMD Radeon RX 6950 XT AMD Radeon RX 6900 XT
Drawing layout: NAVI 31 XTX RDNA 3 (5 nm + 6 nm) NAVI 31 XT RDNA 3 (5 nm + 6 nm) Navi 21 XTXH (7 nm, RDNA 2) Navi 21 XTX (7 nm, RDNA 2)
Stream processors: 96 currency units
6144
84 currency units
5376
5120 5120
mounting units: 384 336 320 320
Drip units: 192 192 128 128
RT units: 96 84 80 80
hour/batch: 2300MHz (Shading)
2500MHz (front end)
2000MHz (shading)
2400MHz (front end)
2100/2310MHz 2015/2250MHz
video memory: 24 GB GDDR6 384 bit 20 GB GDDR6 320 Bit 16 GB GDDR6 256 bit 16 GB GDDR6 256 bit
memory clock: 20000 MHz 20000 MHz 18000 MHz 16000 MHz
Memory bandwidth: 960 GB/sec 800 GB/sec 576 GB/sec 512 GB/sec
Infinity Cache: 96 MB
Up to 5300 GB/s
80 MB
Up to 5300 GB/s
128 MB
Up to 1793.5 Gb/s
128 MB
Up to 1664.2 Gb/s
TBP: 355 watts. 300 watts 335 W 300 watts
Recommended power source: Not reported Not reported 850 watts 700 watts
conductor: PCI-E 4.0 x16 . slot PCI-E 4.0 x16 . slot PCI-E 4.0 x16 . slot PCI-E 4.0 x16 . slot
Suggested price: $999 $899 $1099 $999

With AMD cards, you’ll already realize the performance potential – these are the first cards with DisplayPort 2.1

One of the new features, which AMD has now officially confirmed, is the presence of DisplayPort 2.1 connectors on the latest Radeons. They offer 56Gbps bandwidth, thus 8Gbps more than HDMI 2.1 and nearly 2x more than DisplayPort 1.4a. This translates to being able to play without image compression in 4K at a 240Hz refresh (or 480Hz with such compression) or, more ambitiously, in 8K at a 165Hz refresh! For esports players, this connector will allow the use of QHD monitors (1440p) with a refresh rate of 900Hz, if it is built at all 😉

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Dr. Lisa Su introduces the new RDNA 3 GPU
Cooling is new, too, but it’s not ridiculously large like some of the other cards introduced recently.

Radeons RX 7000 will not force us to replace the rest of the equipment

Certainly, one of the most important information confirmed today is the very high energy efficiency of the new cards. In practical terms, this means that the latest Radeon RX 7900XTX should only have a power limit of 355 watts (and 300 watts for the RX 7900 XT). Both new cards in this arrangement will be satisfied with two 8-pin power connectors and possibly a 650-750W power supply (with a high standard of 80Plus Gold or higher).

Dr. Lisa Su introduces the new RDNA 3 GPU
New Radeons can be easily installed even on an old computer.

This power consumption also means less heat, and therefore a completely “standard” card size in terms of cooling. The reference models are slightly larger than those of the previous generation, which is also expected to increase their work culture. All this is great news for people who want to replace just the card in the computer, without moving the housing, power supply, and fuses into the switch cabinet 😉

AMD responds to DLSS 3.0 by introducing FSR 3

That’s right, NVIDIA’s innovative technology will likely cease to be a significant feature on the green side next year, as AMD plans to expand FSR functionality with similar mechanisms for creating additional frames in order to visually smoothen animations. We don’t know yet how exactly this will work and whether it will require the latest generation of AMD cards, but it’s good that we’ve already received such an announcement now. At the moment, the only thing AMD has announced is two times higher performance with FSR 3 compared to FSR 2.

RDNA 3 - FSR 3
No details, but it looks interesting!

However, what we will get faster is a new feature in AMD Adrenaline drivers – AMD Hyper-RX. You are supposed to automatically receive the optimal settings for all functions (and we assume, the in-game settings) of our equipment in order to deliver the highest performance with optimum image quality. Here, let’s add that the show gave the impression that the priority will be on performance, not quality.

RDNA 3 - Hyper-RX
Automatic optimization of game settings will come to the AMD Adrenaline driver.

Radeon RX 7000 also supports AV1 . encoder

With the new Radeons, AMD joins the group of GPU manufacturers offering free and highly efficient AV1 encoding support. Moreover, the new Radeons will also offer two encoding and image post-processing using AI (for better quality, especially for small fonts and HUD elements in movies). Here, the performance has increased seven times compared to the previous generation of AMD cards. This is another strong competitive advantage that we get in a much cheaper product!

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RDNA 3 - AV1 Encoder
AMD follows the needs of gamers and is greatly improving their video encoder.

New Radeons mean nearly double the performance in games

The presentation did not refer to competition cards, but only to the top model of the previous generation of Radeon cards – the RX 6950 XT. With regard to this card, the performance in classic rasterization increased from 50% to 70%. That’s a lot more than was advertised for the more priced RTX 4080.

RDNA 3 - Drip Performance
Brilliant gain, especially considering the low power consumption!

If Ray Tracing is activated, the increase is even greater, because, of course, the units responsible for these calculations have been slightly improved. In practice, the new Radeon RX 7900 XTX allows you to play Dying Light 2 in 4K (with FSR) with active ray tracing at over 70 fps performance. At similar settings, Cyberpunk 2077 will allow you to play at more than 60 frames per second.

RDNA 3 - Capacity RT
Ray Tracing’s performance gain is a bit less than we’d expect, but there’s nothing to complain about anyway.

The new Radeons will go on sale later this year

Next-gen cards are expected to hit store shelves before Christmas, so we’re talking about early December. Earlier, we will likely know their real performance (the model will also be tested by our editorial office). High availability has been announced, which will make these cards, along with competitive pricing (remember – $899 for the RX 7900 XT and $999 for the RX 7900 XTX) a very tasty treat on your Christmas shopping list. What do you think of the officially announced AMD cards?

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