AMD Radeon RX 7900 XT and RX 7900 XTX Review

Introduction and Technical Specifications

AMD Radeon RX 7900 XT and RX 7900 XTX Review

Introduction

We don't think anyone will disagree much if we say that all hardware, and graphics cards in particular, have seen prices reach the kind of heights that would make mountaineers jealous.

Famed as the company that have always shown a strong commitment to providing affordable hardware, AMD have used their experience when designing the RDNA 3 architecture to put affordability - relatively of course - first and foremost, building the best card they can that will be available for a MSRP of under a thousand Pounds/Dollars/Euros. Even if that was as far as they went they deserve a level of applause for trying to resist the snowballing greed of the current economy.

However, that isn't all AMD have done. They've adopted all of the current technology ideas and their own chiplet experience to produce a graphics architecture which ticks all the boxes. Both cards we have on test today have a whole chunk of GDDR6 memory to ensure a smooth 4K experience. The Compute Units have, fittingly, been upgraded to their 3rd generation to give better performance from a similar number. The Infinity Cache that we've seen on their 6000 series of cards and their Ryzen 5800X3D CPU is now in its second generation and, with 5.3 TB/s of bandwidth, even faster than ever. Their ray tracing cores have moved to the 2nd generation too, and new AI Accelerators power a multitude of image quality options.

Some of you, however, love a high resolution and refresh rate combination and will be pleased to hear that the new AMD Radiance Display Engine lets you run 12-bit HDR at 8K 165Hz utilising the, Industry first, DisplayPort 2.1 or HDMI 2.1a ports on the cards. It's rare to have a graphics card that is capable of outputing a signal better than most monitors can receive. Futureproof.

Technical Specifications

The biggest changes from the new RDNA 3 architecture is the move from 7nm across the board to 5nm GPU. Additionally AMD have added AI acceleration processors to their new 7000 series cards. What will really interest everyone is the improvements in ray tracing. The raw number of Ray Accelerators might not seem much when compared to the RX 6950 XT, but the 2nd generation has enormous performance improvements. Okay that's a bit of a spoiler for our results, but take it from us, this ain't your Daddy's Radeon card. It is to graphics card equality what the Ryzen CPUs were to their blue competitor.

The 7000 series also sees the introduction of a 2nd generation Infinity Cache, 80MB on the XT and 96 MB on the XTX. Memory has also seen a big jump up to 20 GB of 320 bit on the XT, whilst the XTX has a whopping 24 GB of 384-bit. Nice.

OC3DRadeon RX 7900 XTRadeon RX 7900 XTXRadeon RX 6950 XT
ArchitectureRDNA 3RDNA 3RDNA 2
Manufacturing Process5nm GCD; 6nm MCD5nm GCD; 6nm MCD7nm
Transistor Count57.7 billion57.7 billion26.8 billion
Die Size300 mm2 GCD
220 mm2 MCD
300 mm2 GCD
220 mm2 MCD
520 mm2
Compute Units968480
Ray Accelerators968480
AI Accelerators1921680
Stream Processors614453765120
GPU Clock2300 MHz2000 MHz2100 MHz
Boost Clock2500 MHz2400 MHz2310 MHz
Peak Single Precision61 TFLOPS52 TFLOPS23.65 TFLOPS
Peak Half Precision123 TFLOPS103 TFLOPS47.31 TFLOPS
Texture Fill Rate960 GT/s810 GT/s739.2 GT/s
ROPs192192128
Pixel Fill Rate480 GP/s460 GP/s295.7 GP/s
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Most Recent Comments

12-12-2022, 15:32:46

AngryGoldfish
OK, so... not as good as the hype. In fact, it's quite a bit behind even the modest hype. Many people were expecting smack in the middle of 4080 and 4090 performance with equivalent power draw. But in actuality it's only just as fast as a 4080 in raster and behind in efficiency. If it weren't for Nvidia's absurd pricing of the 4080 (which I imagine they are deeply regretting now), the XTX and XT would be pretty sad.

Performance is fine, but it should have been $800. That would have been a true shake-up.

Price is fine, but it should have been 10-20% faster at the same TDP. That would have been a true shake-up.

Seeing as AMD can't magic up 20% performance at the same TDP, the first option would have made more sense. Sadly though greed inhabits AMD too.Quote

12-12-2022, 15:37:03

AlienALX
Yup agreed. Hugely underwhelming, should be £800.

And yup, being greedy. Much cheaper to make than a 4080 yet will cost the same.Quote

12-12-2022, 16:00:19

AngryGoldfish
Quote:
Originally Posted by AlienALX View Post
Yup agreed. Hugely underwhelming, should be £800.

And yup, being greedy. Much cheaper to make than a 4080 yet will cost the same.
I actually think that with RT and DLSS and efficiency of the 4080, the XTX is only on par with it at $1200—it's the same 'price to performance'. As in, if I were in the market for a card like either of those two, I'd strongly consider a 4080 over an XTX. Instead of AMD giving consumers a clear choice, they've made it so that Nvidia is still a consideration. They've done since so many times now that I don't think AMD will ever change. They don't want to shake the market up; they want to do what Nvidia does and continue to lose market share while somehow maintaining profits.Quote

12-12-2022, 16:09:33

AlienALX
Quote:
Originally Posted by AngryGoldfish View Post
I actually think that with RT and DLSS and efficiency of the 4080, the XTX is only on par with it at $1200—it's the same 'price to performance'. As in, if I were in the market for a card like either of those two, I'd strongly consider a 4080 over an XTX. Instead of AMD giving consumers a clear choice, they've made it so that Nvidia is still a consideration. They've done since so many times now that I don't think AMD will ever change. They don't want to shake the market up; they want to do what Nvidia does and continue to lose market share while somehow maintaining profits.
You know it's bad when you say "I would consider a 4080 over it".

The worst value card to release ever.Quote

12-12-2022, 20:08:43

Dicehunter
Both AMD and Nvidia need to rein these prices in, The vast majority of people I know who are in the market for a new card have simply said "Nope, Getting a PS5 instead".Quote
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