After an endlessly long wait, AMD’s Navi 32 GPUs are finally starting to pay off. This is a second-tier RDNA 3 graphics processor and only the second ever to use AMD’s new GPU chiplet packaging technology. The red team seems to be focused on the mobile market at the moment and the fact that it was the laptop version of his RX 7800 series silicon that was leaked speaks for itself.
However, this means that we will likely still have to wait a while for the RX 7700 or RX 7800 trim desktop cards to arrive.
twitter leaker, all the watts lists the expected specs for five different Navi 32 based mobile graphics cards. There’s no way to 100% verify the veracity of these rumored specs, but it looks pretty likely and in line with previous generation AMD mobile GPUs.
They also posted a shot of the 3DMark Time Spy benchmark, presumably with the RX 7800M XT running, but that’s well beyond what the best Radeon chips in previous generation laptops can gather. In short, it offers the performance of the RTX 4070 desktop.
The RX 6850M XT averages around 11,000 points and the RTX 4070 is about the same at 17,800 points. This speaks well to the performance of the Navi 32 silicon, but given how far behind AMD is with its 2nd tier RDNA 3 GPUs, this was a concern.
The RX 7800M XT is next-generation Radeon’s top mobile chip and the fact that it can apparently deliver that level of performance with a total board power of around 189W is impressive.
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As expected, with the RX 7800 XT having the same basic GPU configuration but with higher clock speeds and more power, this should lead to good desktop performance.
However, this is quite a “should”, and having more processing power through the Navi 32 GPU is no guarantee that you’ll actually get even more performance from your desktop GPU. Indeed, current experience with RDNA 3 chips, either in monolithic or chiplet trims, has not shown any particular suitability for achieving ultra-fast clock speeds. Anyway, it’s not the 3GHz+ figure we’d expect from a Radeon RX 7000 series chip.
So far, the high-end RX 7900 XTX and RX 7900 XT cards are powered by the somewhat shaky Navi 31 chip, while the low-spec RX 7600 is powered by the Navi 33 GPU. His Radeon card in the mid-range stands out for its lack, with rumors suggesting that the performance isn’t what AMD had hoped for.
If the red team can’t bolster their desktop power and boost clock speeds significantly, they’ll be looking at the RX 7800 XT, which performs similarly to the RX 6800 XT. And in terms of intergenerational performance gains, this is not very good.
Still, sticking to the mobile side bodes well for AMD-powered notebook gaming chops. For reference, that his Time Spy score falls just short of the average GPU score of the RTX 4080 laptop chip (close to the RTX 4070 Ti desktop part), which looks like a great result to me.
Complete rumored line-up The mobile Radeon chips in are:
- RX7800MXT | 60CU | 16GB | 165W
- RX7800M | 54CU | 16GB | 150W
- RX7700M | 48CU | 12GB | 140W
- RX7900S | 60CU | 16GB | 135W
- RX7800S | 48CU | 12GB | 120W
The RX 7900S has the same basic specs as the RX 7800M XT, but it looks a bit odd given its lower power profile. The same goes for the RX 7700M and RX 7800S, but AMD’s current naming convention is better left unsaid. I barely understand the nomenclature of laptop chips (I need a fucking coding wheel, ffs) and I really don’t know the names of graphics cards.
But my mother said don’t say anything if you don’t have anything good to say. However, if I had followed that advice strictly throughout my career, I wouldn’t be able to publish as many books as I do today.
Regardless, depending on the price of these Radeon machines, the RX 7800M XT could be the GPU you want at the center of your next gaming laptop. It delivers serious performance with the level of efficiency I’m definitely looking for. It will be interesting to see how close it is to the lower powered RX 7900S in terms of performance for the 135W GPU, but for high fps gaming I suspect the RX 7800M XT will be the best fit for him.
And considering the fact that benchmark scores seem to be out now, it may not be long before we know exactly how good they are in the real world.
