Wednesday, January 4th 2023
AMD Outs Radeon RX 7600M and RX 7600S RDNA3 Mobile Discrete GPUs
AMD today released its first mobile discrete GPUs based on its latest RDNA3 graphics architecture, the Radeon RX 7600M series, and the RX 7600S series. Although based on the latest architecture, AMD decided to built these GPUs on monolithic 6 nm dies, along with many of the power-management features incorporated from Ryzen 6000-series "Rembrandt" processors. The unnamed silicon these GPUs are based on physically features 32 RDNA3 compute units (2,048 stream processors), along with the updated dual instruction-issue rate SIMD components, 2nd generation Ray Accelerators, and AI acceleration. The silicon also features a 128-bit GDDR6 memory interface, supporting speeds of up to 18 Gbps.
The Ryzen 7600M series consists of the top RX 7600M XT with 32 CU, and the slightly lower RX 7600M with 28 CU. Both come with 8 GB of GDDR6 memory across the chip's 128-bit memory interface. The RX 7600M XT uses 18 Gbps memory clocks, while the RX 7600M uses 16 Gbps. The RX 7600M XT has a power band of 75 W to 120 W, while the RX 7600M needs 50 W to 90 W. The RX 7700S and RX 7600S have the same core-configurations as the RX 7600M XT and RX 7600M, respectively, but lower power draw (up to 100 W for the RX 7700S, and up to 75 W for the RX 7600S). Both GPUs feature updated display- and media-acceleration engines, with support for QHD+ displays up to 240 Hz. AMD claims that the RX 7600M XT beats the performance of desktop NVIDIA GeForce RTX 3060 12 GB.
The product stack consists of four SKUs detailed above.
The complete slide-deck follows.
The Ryzen 7600M series consists of the top RX 7600M XT with 32 CU, and the slightly lower RX 7600M with 28 CU. Both come with 8 GB of GDDR6 memory across the chip's 128-bit memory interface. The RX 7600M XT uses 18 Gbps memory clocks, while the RX 7600M uses 16 Gbps. The RX 7600M XT has a power band of 75 W to 120 W, while the RX 7600M needs 50 W to 90 W. The RX 7700S and RX 7600S have the same core-configurations as the RX 7600M XT and RX 7600M, respectively, but lower power draw (up to 100 W for the RX 7700S, and up to 75 W for the RX 7600S). Both GPUs feature updated display- and media-acceleration engines, with support for QHD+ displays up to 240 Hz. AMD claims that the RX 7600M XT beats the performance of desktop NVIDIA GeForce RTX 3060 12 GB.
24 Comments on AMD Outs Radeon RX 7600M and RX 7600S RDNA3 Mobile Discrete GPUs
Edit: the 1080p performance difference with RX 6600M is only +20% +30% depending on the title despite having nearly 4X (3.6x) the TFlop rating?
I buy laptops only with AMD Ryzen and AMD Radeon.
If I was forced to guess based on specs, these really aren't any faster than the RX 6600 and RX6650XT that they'd replace, yet they are on more expensive TSMC N6 silicon compared to the RX6600-series' old TSMC N7nm.
The architectural improvements, (IPC) from RDNA2 to RDNA3 appear to be pretty underwhelming too, The 7900XTX is ~33% faster than the 6900XT at 1440p where memory bandwidth shouldn't be a factor, and that's likely because it is clocked 10% faster and has 20% more compute units. It would be hard to imagine an RDNA2 card with higher clocks and more compute units performing any differently, really, since the performance scaling of the 6600 to the 6950XT models falls exactly where you'd expect it to based on clocks and CU count.
The only thing these appear to bring to the table is power efficiency over the desktop RX6600-series, and for laptops in particular, "desktop RX 6600" performance at 50-75W is really quite appealing. The current RX 6600 on desktop needs about 110W to run at around 2.4GHz, which is still plenty fast enough to run circles around a desktop RTX 3060. Last year I temporarily sidegraded from a 3060 to a 6600 in an attempt to reduce heat in my cramped HTPC case - only it wasn't a sidegrade, just about everything ran significantly better on the 6600 for ~50W less power used.
In that case (running @3 GHz) this would be as fast as a 6700 XT in 1080p and 1440p with 6600 (non XT) MSRP price and with the power consumption of a 6650 XT.
That's my prediction. :)
I'm not paying up front now for promises of future benefits.
They should have proofread their slides :)
compute units, not TFLOPS at all
Meanwhile the GCD is 300mm2, the MCDs are 7x mm2 on the 7900 XT/XTX. And the 7900 is made on 5nm, that's not 6nm.
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