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.

In conjunction with AMD’s announcement of the Radeon Pro W6600 for workstations was released more details about the graphics circuit. 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.

AMD Radeon RX 6600M GPU 3.png

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

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.

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.

SweClocker’s tests of the Radeon RX 6000 series:


Source: SweClockers by www.sweclockers.com.

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