AMD Radeon RX 6600 LE vs AMD Steam Machine GPU Comparison

The Verdict

The recorded data presents two distinct AMD GPUs with different positioning. The AMD Radeon RX 6600 LE is an actively produced Radeon RX 6000 series part with a 91st percentile ranking among all GPUs in the database and an average benchmark score of 70,829. The AMD Steam Machine GPU is a console-oriented part from Valve with a 50th percentile ranking and no recorded benchmark scores, leaving its average at zero. For users seeking measured performance data, the RX 6600 LE is the only option with verified numbers. The Steam Machine GPU occupies a different design space, with a lower thermal envelope and a console form factor. The data indicates the RX 6600 LE should be selected when benchmark-verified performance matters, while the Steam Machine GPU is defined by its integration context rather than standalone test results.

Where Each One Wins

The RX 6600 LE delivers measurable wins across every benchmark category present in the database. Its Geekbench OpenCL score of 69,229 and Geekbench Vulkan score of 72,428 both contribute to an average of 70,829. The Steam Machine GPU has no benchmark entries, so it cannot claim a single recorded performance victory.

The Steam Machine GPU wins on efficiency metrics. Its thermal design power is 110 W, which is 22 W lower than the RX 6600 LE's 132 W. It also requires no external power connectors, whereas the RX 6600 LE uses a single 8-pin connector. The Steam Machine GPU is physically smaller in length at 156 mm versus 190 mm, though its other dimensions are larger. The Steam Machine GPU draws less power and needs no supplementary power cabling, making it the more self-contained option.

Architecture Differences

The two GPUs come from different RDNA generations. The RX 6600 LE uses the Navi 23 chip built on RDNA 2.0 architecture, fabricated on a 7 nm process at TSMC. The Steam Machine GPU uses the Navi 33 chip with RDNA 3.0 architecture, fabricated on a 6 nm process at TSMC. The process shrink is accompanied by a higher transistor count: 13,300 million transistors on the Steam Machine GPU versus 11,060 million on the RX 6600 LE. Despite the higher count, the Steam Machine GPU's die is smaller at 204 mm² versus 237 mm², producing a transistor density of 65.2 million per mm² compared to 46.7 million per mm².

Both chips share the same core configuration. Each has 1,792 shading units, 112 texture mapping units, 64 render output units, and 28 ray tracing cores. Neither has tensor cores. The architectural change from RDNA 2.0 to RDNA 3.0 affects the floating-point throughput. The RX 6600 LE delivers 8.942 TFLOPS FP32 and 17.88 TFLOPS FP16 using a 2:1 ratio. The Steam Machine GPU delivers 17.56 TFLOPS FP32 and 17.56 TFLOPS FP16 using a 1:1 ratio. The Steam Machine GPU nearly doubles FP32 throughput while providing the same FP16 figure.

Clock behavior differs between the two. The Steam Machine GPU has a higher base clock at 1720 MHz versus 1626 MHz, a higher game clock at 2250 MHz versus 2045 MHz, but a slightly lower boost clock at 2450 MHz versus 2495 MHz. Memory clocks also differ: the Steam Machine GPU runs at 2250 MHz with 18 Gbps effective, while the RX 6600 LE runs at 1750 MHz with 14 Gbps effective. Both use 8 GB of GDDR6 memory on a 128-bit bus, but the Steam Machine GPU achieves 288.0 GB/s bandwidth versus 224.0 GB/s for the RX 6600 LE.

The Steam Machine GPU carries the codename "Hotpink Bonefish" and is classified as a Console GPU (Valve). Its release date is later in the database, and it has no predecessor or successor listed. The RX 6600 LE lists Navi as its predecessor and Navi III as its successor.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon RX 6600 LE has an average benchmark score of 70,829. The AMD Steam Machine GPU has no recorded benchmark scores and an average of 0.

Q: What is the thermal design power difference between the two?

A: The AMD Steam Machine GPU has a TDP of 110 W, while the AMD Radeon RX 6600 LE has a TDP of 132 W, a difference of 22 W.

Q: Do both GPUs have the same number of shading units?

A: Yes, both the AMD Radeon RX 6600 LE and the AMD Steam Machine GPU have 1,792 shading units, 112 TMUs, 64 ROPs, and 28 ray tracing cores.

Q: Which GPU offers higher memory bandwidth?

A: The AMD Steam Machine GPU offers 288.0 GB/s bandwidth with 18 Gbps effective memory speed, compared to the AMD Radeon RX 6600 LE's 224.0 GB/s with 14 Gbps effective.

Q: How do their floating-point performances compare?

A: The AMD Steam Machine GPU delivers 17.56 TFLOPS FP32 and 17.56 TFLOPS FP16 with a 1:1 ratio. The AMD Radeon RX 6600 LE delivers 8.942 TFLOPS FP32 and 17.88 TFLOPS FP16 with a 2:1 ratio.

Q: What are the process nodes for each GPU?

A: The AMD Radeon RX 6600 LE uses a 7 nm TSMC process, while the AMD Steam Machine GPU uses a 6 nm TSMC process.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries between the RX 6600 LE and the Steam Machine GPU. However, the RX 6600 LE has standalone results that can be positioned against its nearest rivals. Its Geekbench OpenCL score of 69,229 and Geekbench Vulkan score of 72,428 produce an average of 70,829. Among its nearest rivals, the AMD Radeon RX 6650M scores 71,768, which is 1.3% higher than the RX 6600 LE. The NVIDIA RTX A3000 Mobile scores 70,140, which is 1% lower. The NVIDIA Quadro P6000 scores 69,986, which is 1.2% lower. The AMD Radeon Pro WX 8200 scores 69,870, which is 1.4% lower. The RX 6600 LE sits below only the RX 6650M among these four rivals, and it beats the three others by margins ranging from 1% to 1.4%.

The Steam Machine GPU has no benchmark scores and no nearest rivals listed in the database. Its percentile ranking of 50 places it at the median of all GPUs in the database, but without measured scores this cannot be verified against specific competitors. The RX 6600 LE's 91st percentile ranking reflects its position relative to all GPUs in the database, supported by its two recorded benchmark results.

Specification Differences

The two GPUs differ across multiple specification fields. The RX 6600 LE belongs to the Radeon RX 6000 series with a Navi 23 chip and RDNA 2.0 architecture. The Steam Machine GPU has no series listing, uses a Navi 33 chip with RDNA 3.0 architecture, and carries the codename "Hotpink Bonefish" with the generation label "Console GPU (Valve)". The process node moves from 7 nm to 6 nm, both at TSMC. Transistor count increases from 11,060 million to 13,300 million, while die size decreases from 237 mm² to 204 mm². Transistor density rises from 46.7 million per mm² to 65.2 million per mm².

Clock speeds differ: base clock rises from 1626 MHz to 1720 MHz, game clock rises from 2045 MHz to 2250 MHz, and boost clock falls slightly from 2495 MHz to 2450 MHz. Memory clock rises from 1750 MHz with 14 Gbps effective to 2250 MHz with 18 Gbps effective. Memory bandwidth increases from 224.0 GB/s to 288.0 GB/s, while memory size, type, and bus width remain identical at 8 GB GDDR6 on a 128-bit bus.

Compute rates change with the architecture. Pixel rate drops slightly from 159.7 GPixel/s to 156.8 GPixel/s. Texture rate drops from 279.4 GTexel/s to 274.4 GTexel/s. FP32 throughput nearly doubles from 8.942 TFLOPS to 17.56 TFLOPS. FP16 throughput decreases from 17.88 TFLOPS with a 2:1 ratio to 17.56 TFLOPS with a 1:1 ratio.

Power and physical characteristics diverge significantly. TDP drops from 132 W to 110 W. The RX 6600 LE requires a 1x 8-pin power connector and a suggested 300 W PSU; the Steam Machine GPU uses no power connectors and lists no suggested PSU. The RX 6600 LE is a dual-slot card with dimensions of 190 mm length, 110 mm height, and 40 mm width. The Steam Machine GPU has no slot width listed and dimensions of 156 mm length, 152 mm height, and 162 mm width. Display outputs change from 1x HDMI 2.1 with 3x DisplayPort 1.4a on the RX 6600 LE to 1x HDMI 2.1a with 1x DisplayPort 2.1 on the Steam Machine GPU. The RX 6600 LE uses a PCIe 4.0 x8 bus interface; the Steam Machine GPU has no bus interface listed. Both share DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 API support. The RX 6600 LE's release date is earlier in the database, and it lists Navi as predecessor and Navi III as successor, while the Steam Machine GPU has neither.