AMD Radeon "RX 6600 XT" gets 2,048 stream processors

Despite the lack of circuitry, a steady stream of graphics cards continues to be launched from Nvidia and AMD, both on the desktop and laptop side. In early June, AMD unveiled its Radeon RX 6000M series for laptops and it was with the Radeon RX 6600M that the graphics circuit Navi 23 after months of rumors was confirmed by the company itself.

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1 Specifications: – AMD Radeon RX 6600 XT

2 SweClocker’s tests of the Radeon RX 6000 series:

3 Related posts:

In connection with AMD’s announcement of the Radeon Pro W6600 for workstations, further details about the graphics circuit were released. It appears here that the mobile Radeon RX 6600M is based on a scaled-down variant of the Navi 23 with 28 computing units for a total of 1,792 stream processors. In its full-featured version, the Navi 23 steps up to 32 computing units and 2,048 stream processors.

Specifications: – AMD Radeon RX 6600 XT

	RX 6800 XT	RX 6800	RX 6700 XT	RX 6600 XT	RX 5700 XT
Architecture	RDNA 2	RDNA 2	RDNA 2	RDNA 2	RDNA
Technical	7 nm TSMC	7 nm TSMC	7 nm TSMC	7 nm TSMC	7 nm TSMC
Circuit	Navi 21	Navi 21	Navi 22	Navi 23	Navi 10
Circuit surface	520 mm²	520 mm²	335 mm²	237 mm²	251 mm²
Transistors	26.8 billion	26.8 billion	17.2 billion	11.1 billion	10.3 billion
Compute Units	72 st.	60 st.	40 st.	32 st.	40 st.
Raster units	128 st.	96 st.	64 st.	64 st.	64 st.
Texture units	288 st.	240 st.	160 st.	128 st.	160 st.
Ray Accelerators	72 st.	60 st.	40 st.	32 st.	–
Streamprocessorer	4 608 st.	3 840 st.	2 560 st.	2 048 st.	2 560 st.
Playing frequency	2 015 MHz	1 815 MHz	2 424 MHz	1 692 MHz(?)	1 755 MHz
Turbo frequency	2 250 MHz	2 105 MHz	2 581 MHz	2 684 MHz(?)	1 905 MHz
Calculating power (FP32)	20 736 GFLOPS	16 166 GFLOPS	13 215 GFLOPS	10 994 GFLOPS(?)	9 754 GFLOPS
Infinity cache	128 MB	128 MB	96 MB	32 MB	–
Memory bus	256-bit	256-bit	192-bit	128-bit	256-bit
Memory amount	16 GB GDDR6	16 GB GDDR6	12 GB GDDR6	8 GB GDDR6(?)	8 GB GDDR6
Memory speed	16 000 MHz	16 000 MHz	16 000 MHz	16 000 MHz(?)	14 000 MHz
Memory bandwidth	512 GB/s	512 GB/s	384 GB/s	256 GB/s(?)	448 GB/s
Power supply	8+8-pin	8+8-pin	8+6-pin	?	8+6-pin
TBP	300 W	250 W	230 W	?	225 W
Price at launch	649 USD	579 USD	479 USD	?	399 USD

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Furthermore, it appears that the circuit as a whole measures in at 237 mm² and thus is slightly smaller than the Navi 10 which houses the Radeon RX 5700 XT. The latter, in turn, has more computing units, but this is something a future Radeon RX 6600 XT is expected to compensate for through significantly higher clock frequencies. Although Navi 23 is smaller and manufactured on the same 7-nanometer technology from TSMC, it houses more transistors than Navi 10 – 11.1 billion compared to 10.3 billion.

► Specifications for AMD Radeon RX 6600 XT and RX 6600 are glimpsed

The fact that Navi 23, despite having fewer computing units than Navi 10, has more transistors and is more complex can be attributed to all the new functions and performance improvements in RDNA 2, as well as functions that support ray tracing. There is also a 32 MB Infinity Cache, the purpose of which is to compensate for the circuit’s narrow memory bus of 128 bits.

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True to AMD’s practice in both processors and graphics chips, they have with Navi 23 cut in the number of PCI Express 4.0 channels, which here is 8 in number instead of the usual 16. AMD often explains this by saying that it is to hold down power consumption, but it is probably primarily a matter of keeping the circuit surface down and increasing margins.

It is currently not known when the graphics circuit Navi 23 can be found in graphics cards for desktops and at what price.