HomeNewsAMD RX 7900 XTX vs. RX 7900 XT: AMD's monster GPUs, compared

AMD RX 7900 XTX vs. RX 7900 XT: AMD’s monster GPUs, compared

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The long-awaited RX 7000 sequence has lastly arrived, or extra particularly, AMD’s two top-end GPU flagships have. The 7900 XT and the 7900 XTX are set to go head-to-head with the Nvidia RTX 4080, though they could not sustain with the RTX 4090.

Given how completely different the 4080 and 4090 are from one another, you may surprise if the identical factor is occurring with the 7900 XT and the 7900 XTX. Right here’s all the things we all know up to now.

Pricing and availability

AMD

Introduced for the primary time on November 3, 2022, the 7900 XT and 7900 XTX are up for grabs beginning December 13, priced at $900 and $1,000, respectively. The pricing construction right here is much like the RX 6000 sequence, which had the $999 RX 6900 XT, then added a $900 GPU.

This might assist bridge the hole between the higher-end RX 7000 GPUs with the top-end fashions; in contrast, the RX 6800 XT launched for $649, nicely beneath the 6900 XT’s price ticket, with no GPU in between the 2 fashions.

Specs: RX 7900 XT vs. RX 7900 XTX

Two AMD Radeon RX 7000 graphics cards on a pink surface.
Jacob Roach / Digital Developments

Right here’s a fast have a look at how these two fashions differ on the spec sheet.

AMD Radeon RX 7900 XTX AMD Radeon RX 7900 XT
GPU Navi 31 Navi 31
Course of node TSMC 5nm (GCD), TSMC 6nm (MCD) TSMC 5nm (GCD), TSMC 6nm (MCD)
Cores 6,144 5,376
Compute items 96 84
Ray tracing accelerators 96 84
AI accelerators 192 168
Recreation clock 2,300MHz (Recreation clock) / 2,500MHz (Enhance clock) 2,000MHz
Reminiscence dimension 24GB GDDR6 20GB GDDR6
Reminiscence bus width 384-bit 320-bit
TBP 355W 315W

Basically, the 7900 XTX has the total Navi 31 GPU with all of the bells and whistles, whereas the 7900 XT is barely lower down. The XT mannequin has 84 of the 96 Compute Models (or CUs) that Navi 31 has to supply, a clock pace of 2GHz versus the two.3GHz on the XTX, and 20GB of reminiscence as an alternative of 24GB GDDR6.

The Whole Board Energy (TBP) for the 7900 XT can also be somewhat decrease, in fact, as is the clock pace. General, each GPUs are fairly comparable — the one actual distinction lies within the efficiency.

RDNA 3 Structure

The Navi 31 GPU.
AMD

The 7900 XT and 7900 XTX are each powered by the brand new RDNA 3 structure, which is radically completely different from RDNA 2, the structure inside RX 6000-series GPUs. The 2 GPUs share the identical structure, however it’s value exploring when contemplating AMD’s newest and biggest.

Most significantly, chiplets, the expertise that propelled Ryzen into first place in 2019, have lastly come to GPUs. That’s large information, however the chiplet design for RX 7000 is in some ways very completely different from what we’ve seen with Ryzen and different AMD CPUs. As a substitute of getting a number of dies for cores and one further die for I/O and different features, RX 7000 GPUs have one die with all of the cores and a number of other dies that every have one GDDR6 reminiscence controller and 16MB of Infinity Cache. The chip with all of the GPU cores is now known as the Graphics Compute Die (GCD) and the chips with reminiscence controllers and cache are Reminiscence Cache Dies (MCD).

This implies an RX 7000 GPU (particularly the 7900 XTX) can have as much as 96MB of Infinity Cache and a bus width of 384-bit, which collectively enable the 7900 XTX to hit a peak bandwidth of 5.3 TB/s. In the meantime, the 7900 XT seems to have one much less MCD and thus has simply 80MB of cache and a 320-bit bus, in addition to 4GB much less VRAM. Decrease-end RX 7000 GPUs will doubtless use a distinct GCD and even fewer MCDs, however we’ll have to attend till these are introduced subsequent yr for all the small print.

RX 7900 XTX installed in a test bench.
Jacob Roach / Digital Developments

RDNA 3 additionally comes with a brand new node. Final-generation RX 6000 GPUs had been fabbed on TSMC’s 7nm node; now, RX 7000 GCDs are fabbed on 5nm, which has as much as 1.8 occasions the transistor density of 7nm, in addition to a 15% clock pace increase for a similar energy consumption or 30% much less energy on the identical clock pace. Mixed with architectural enhancements, 5nm reportedly permits RDNA 3 to be 54% extra environment friendly than RDNA 2.

In the meantime, RX 7000’s MCDs are fabbed on TSMC’s 6nm node, which is principally 7nm, however with a deal with effectivity, low energy, and low price. Cache and I/O gadgets like reminiscence controllers are more and more tougher to shrink with each new era, which is why AMD is sticking with 6nm for these MCDs; 5nm is simply too costly whereas offering little enchancment for this type of stuff.

Efficiency

Average 4K performance for RX 7900 XT and RX 7900 XTX.

Based mostly on our personal testing of the AMD Radeon RX 7900 XTX and the RX 7900 XT, it’s secure to say that these are two strong GPUs. AMD manages to maintain up with — and in some instances even outpace — the Nvidia RTX 4080. Nevertheless, acting on the extent of the beastly RTX 4090 is nothing however a pipe dream that AMD by no means even deliberate to entertain. Each the 7900 XTX and the 7900 XT are being introduced as rivals of the RTX 4080, and in that, they principally succeed. Let’s check out some efficiency metrics.

Testing the playing cards in 4K gaming eventualities reveals that they’re near the 4080. The RX 7900 XTX is round 6% slower, whereas the hole for the 7900 XT is significantly bigger at round 15%. In comparison with the final era, there are some efficiency features, however they’re not as drastic as was the case for the RTX 4090. The flagship RX 7900 XTX beats the previous-gen RX 6950 XT by 26%, whereas the RX 7900 XT trails behind the XTX, however nonetheless beats the 6950 by 14%. Each the playing cards beat the RTX 3090, however the lead is just not as vital as one might need hoped.

However, if all you care about is the power to sport at 4K, you’ll positively discover that in each these playing cards — and cheaper than Nvidia, too. When it comes to frames per second (fps), the 7900 XTX scored a powerful 62.4 fps in Cyberpunk 2077. That’s marginally greater than the RTX 4080 (58.9 fps) and the 7900 XT (57.6 fps). General, throughout all the titles we’ve examined at 4K, the RX 7900 XTX maintained round 76.4 fps on common, adopted by the RX 7900 XT with 69.1 fps.

RX 7900 XT and RX 7900 XTX performance in Cyberpunk 2077 with ray tracing.

Sadly, AMD doesn’t shine once you have a look at ray tracing. There are some enhancements, certain, however Nvidia continues to be the undisputed king of ray tracing, and for now, AMD doesn’t even come near difficult Workforce Inexperienced.

Enjoying Cyberpunk 2077 at 4K with ray tracing enabled is just actually potential on the RTX 4090 (and even then, it’s nonetheless not superb), however nonetheless, the RTX 4080 manages to take care of an enormous lead over the 2 Radeons. In actual fact, the flagship 7900 XTX simply barely beats the last-gen RTX 3090, scoring a mere 21.5 fps. The 7900 XT fares even worse with 18 fps.

Nearer than Nvidia

RX 7900 XTX and RX 7900 XT on a pink background.
Jacob Roach / Digital Developments

After seeing the large distinction between the RTX 4090 and the RTX 4080 (particularly that canceled 12GB mannequin), it’s a aid to see RX 7000 isn’t repeating that state of affairs. So far as GPU launches go, the 7900 XT and 7900 XTX are a bit standard, with the XTX mannequin representing the most effective of the most effective AMD has to supply. whereas the XT is a little more lower down for a cheaper price.

So, based mostly on our personal testing, which GPU do you have to purchase? In the mean time, the 7900 XTX is actually the higher deal. For $100 extra, you get a lot better worth throughout the board. It may possibly provide top-notch 4K gaming efficiency, and in case you don’t care an excessive amount of about ray tracing and upscaling, you gained’t remorse selecting AMD over Nvidia this time round.

Sadly, the RX 7900 XT is simply not value it. In virtually any state of affairs, you’d be higher off spending that further $100 and getting the enhancements that the RX 7900 XTX brings.

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