AMD Radeon RX 7000 GPU Series and RDNA 3 Architecture
We are now going to post the entire Radeon RX 7000 Series product information and RDNA 3 architecture information for those that would like more details and more of a deep dive into these new GPUs.
The Radeon RX 7000/7900 series improves upon performance per Watt by 54% and 165% more transistors per mm2 with a new interconnect between Chiplets that is 5.3TB/s. You can see specifically what’s new in RDNA 3 architecture below.
The Radeon RX 7900 PCB is made from premium IT-170 material with a 14-layer PCB with 4 layers of 2 oz. copper. It has 20 power-stage phases and low PCIe slot peak currents. It has 24GB of GDDR6 on the 7900 XTX, and the GPU is a Chiplet design. It has HDMI 2.1a, DisplayPort 2.1, and USB Type-C. The shroud is a die-cast aluminum shroud and the backplate is die-cast aluminum as well. It has a 10% larger vapor chamber and uses dispensed GDDR6 thermal interface material, ultra-soft MOSFET thermal interface material, and new GPU thermal interface material. The LED is RGB, and the fans support Zero-RP mode, also unique the fans have intake temperature sensors.
The Radeon RX 7000 series has a new AMD Radiance Display Engine. This supports full REC2020 coverage, 12-bit HDR color support, and of course DisplayPort 2.1 and AVI Encoding/Decoding.
RDNA 3 Architecture
We are going to post the entirety of the RDNA 3 architecture information if you’d like to learn what makes this architecture tick. The notable improvements are naturally moving to a Chiplet design with a GCD and MCDs. The GCD contains the Compute Units, Ray Accelerators, AI accelerators, Stream Processors, and such. The MCDs contains the memory controller, AMD Infinity Cache, and other I/O. In order to facilitate the high bandwidth needed to connect the chiplets AMD had to come up with its new Infinity Links technology, with high-performance fanout links that can provide up to 5.3TB/s of bandwidth across the chiplet interconnect.
RDNA 3 doubles the FP32 units. The Ray Accelerators for Ray Tracing have also been improved with better handling of ray divergence, traversal flags reducing work in the shader core, and enhanced BVH formats and construction reducing overall traversal steps.
AMD is also using the new 2nd Gen Infinity Cache. While the 7900 XTX has 96MB, less than the 128MB in the Radeon RX 6900 series, it is much faster in this new generation. They can get away with less, yet have higher performance. There is 96MB of 2nd Gen Infinity Cache, 6MB of L2 cache, 3MB of L1 cache, and 3MB of L0 cache, all of which is faster than the previous gen.
Discussion (19 replies)
Join Discussion →Pretty much what I expected. On par or better than the 4080 at rasterization. But gets stomped to death in ray tracing.
Still...for raster workloads it's a bargain.
Now it's just a waiting game for EK to make water blocks for the OC non-reference cards.
Yup - no surprises, which I think is good because I had pretty high expectations to begin with and it pretty well met them.
Now to see how availability and the scalpers play out.
Also can’t wait to see what the power data shows.
Great review thanks
Seems better then my 3080 now to see European prices.
Very nice this card is something to be excited about. ESPECIALLY with AMD's 'Fine wine' methodology to their drivers.
Ray Tracing. 4K is for Ray Tracing.
price is acceptable, but why is the XT even a thing at 899? It wont sell.
Too bad AMD cant figure out how to do more for RayTracing......
Considering they are pretty much on par with 3090's for RT performance that isn't bad. The question is did they revise their RT processing ability to make it stronger and just haven't been able to properly flex it in drivers yet?
I'm perfectly fine with slower RT performance myself - it isn't an important feature. By the time I actually care about RT we will probably be 3+ generations removed from today's cards.
If it's anything like the 5000 and 6000 gens of XT and XTX -- the XT would overclock to darn near the same performance level as the XTX for a few dollars less, and that made it a pretty attractive option.
I don't run RT in any game other than CP2077. I'm an FPS wh0re. So rasterization performance is king in my court. The 7900XTX gets it done for an attractive price....hopefully. LOL We'll see what the AIB OC cards come in at. I have a feel that those with 3x 8 pin power are going to be overclock beasts so long as you can keep them cool. Well, dangit, I watercool all the things. So, we'll see.
I never thought I'd see the day where a $999 card would be considered a bargain... :rolleyes: :rolleyes:
I did expect more from the XTX, sure it beats the 4080 at 1080p and meets or beats it at 1440p, but it looses at 4k for the most part and this is where this card should shine. And that's not even taking DLSS2.x and 3.0 into account.
Not a bad card by all means, but I really hoped for a real RTX4080 KILLER, you know? that card that's been promised generation after generation, but has yet to come.
Refreshing review, nicely done. Very modern RT titles that had exposer to RNDA2, current gen consoles, FarCry6 and Spiderman does very well with RT. Older mostly driven Nvidia RTX titles, DXR 1.0 era takes a significant hit.
Point is RT performance is also heavily dependent upon how programed or optimized for. I don't think AMD rt performance is as powerful as Nvidia's but also think it may not really be that far behind. Newer games will show this or not.
Very tempting buy for a number of reasons.
Maybe I'm looking at the wrong numbers, but the XTX beats the 4080 in every single rasterizing benchmark FPSR threw at it with just one exception: When upscaling is used and DLSS is available and FSR is not (Watch Dogs)
[URL unfurl="true"]https://www.thefpsreview.com/2022/12/12/amd-radeon-rx-7900-xtx-video-card-review/5/#ftoc-heading-7[/URL]
It's not beating a 4090, but it's certainly knocking on the door there. But the 4080? Yeah, the XTX has is beat, until you turn on RT.
Even looking at RT - you are still at 3090/Ti levels, which even just that still costs more than the XTX MSRP.
I have to say I'm not looking at just this review benchmarks, but what I've seen in other reviews.
One thing is for sure, nvidia will have to reduce the price of the RTX4080. $200 for the "nvidia tax" is just too much even at that price range.
Its clear people were waiting for the 7900XTX release and it may have payed off one way or the other.