AMD Radeon RX 7800M vs AMD Steam Machine GPU Comparison

Head-to-Head Benchmarks

The AMD Radeon RX 7800M and AMD Steam Machine GPU share the RDNA 3.0 architecture but represent different design targets. The RX 7800M carries a full set of recorded benchmark results, while the Steam Machine GPU has no benchmark entries in the database, so direct score comparisons are unavailable. The RX 7800M posts an average benchmark score of 27,883 across ten tests. Its percentile ranking sits at 73 among all GPUs, meaning it outperforms roughly three-quarters of the installed base. The Steam Machine GPU holds a percentile of 50, indicating median performance, but its average score is recorded as zero due to missing test data.

The RX 7800M shows its strongest results in compute-oriented workloads. Its Geekbench Vulkan score reaches 126,668, while the OpenCL score lands at 120,778. The PassMark G3D score of 17,613 and GPU compute score of 9,342 further reinforce its compute capability. In DirectX tests, the PassMark DirectX 11 score of 176 and DirectX 9 score of 174 both exceed the DirectX 10 result of 99 and DirectX 12 result of 89. The PassMark G2D score of 892 reflects 2D graphics throughput.

The nearest rivals in the database provide context for the RX 7800M. The AMD Radeon Pro Vega 20 sits 0.2% ahead with an average score of 27,839. The AMD Radeon Pro W5500X leads by 0.3% at 27,973. The NVIDIA GeForce GTX 980 Ti trails by 0.5% at 28,020, and the AMD FirePro S7150 is 0.8% behind at 28,117. These margins are narrow, placing the RX 7800M in a tightly contested performance band. The Steam Machine GPU has no nearest rivals listed, so no comparative delta values exist.

The RX 7800M delivers 35.87 TFLOPS FP32 performance and an equal 35.87 TFLOPS FP16 with 1:1 ratio. Its pixel rate reaches 224.2 GPixel/s and texture rate hits 560.4 GTexel/s. The Steam Machine GPU provides 17.56 TFLOPS FP32 and 17.56 TFLOPS FP16, with a pixel rate of 156.8 GPixel/s and texture rate of 274.4 GTexel/s. The RX 7800M roughly doubles the Steam Machine GPU in raw shader throughput, pixel fill, and texture fill based on these specifications. The Steam Machine GPU compensates with higher clock speeds: its boost clock of 2450 MHz and game clock of 2250 MHz exceed the RX 7800M's 2335 MHz boost and 2145 MHz game clock. The base clocks differ in the opposite direction, with the Steam Machine GPU at 1720 MHz versus 1295 MHz for the RX 7800M.

The Verdict

The recorded data indicates the RX 7800M is the higher-performing part in absolute terms. Its 73rd percentile ranking versus the Steam Machine GPU's 50th percentile shows a clear tier separation. The RX 7800M's 3840 shading units, 240 texture mapping units, and 96 raster operation units more than double the Steam Machine GPU's 1792 shading units, 112 TMUs, and 64 ROPs. The ray tracing core count follows the same pattern: 60 cores on the RX 7800M against 28 on the Steam Machine GPU.

The RX 7800M also carries a memory advantage. Its 12 GB GDDR6 on a 192-bit bus delivers 432.0 GB/s bandwidth, while the Steam Machine GPU offers 8 GB GDDR6 on a 128-bit bus at 288.0 GB/s. The RX 7800M's 5 nm TSMC process node enables 28,100 million transistors on a 346 mm² die, yielding a transistor density of 81.2 million per square millimeter. The Steam Machine GPU uses a 6 nm TSMC node with 13,300 million transistors on a 204 mm² die, resulting in 65.2 million per square millimeter.

The Steam Machine GPU targets a specific form factor and power envelope. Its 110 W TDP is lower than the RX 7800M's 180 W. The Steam Machine GPU measures 156 mm by 152 mm by 162 mm and integrates one HDMI 2.1a port and one DisplayPort 2.1 output. The RX 7800M is an integrated graphics package with no slot width and display outputs that are portable device dependent. The RX 7800M connects via PCIe 4.0 x16, while the Steam Machine GPU's bus interface is not specified.

For users prioritizing raw performance, the RX 7800M is the clear choice from the data. For those needing a compact, lower-power solution with fixed display outputs, the Steam Machine GPU fits that niche. The Steam Machine GPU's higher clock speeds partially offset its smaller core configuration, but the RX 7800M's resource advantage remains decisive in compute-heavy workloads.

Architecture Differences

The two GPUs share the RDNA 3.0 architecture but use different chips and process nodes. The RX 7800M employs the Navi 32 chip, codenamed Wheat Nas, produced on TSMC's 5 nm process. The Steam Machine GPU uses the Navi 33 chip, codenamed Hotpink Bonefish, on TSMC's 6 nm process. This node difference explains the transistor density gap: the RX 7800M packs 81.2 million transistors per square millimeter versus 65.2 million for the Steam Machine GPU, despite the RX 7800M's larger 346 mm² die versus 204 mm².

The RX 7800M belongs to the Navi Mobile generation within the RX 7000 series, while the Steam Machine GPU is classified as a console GPU for Valve. This classification difference shows in their physical designs. The RX 7800M is an IGP with no power connectors and no listed dimensions, indicating integration into a laptop or portable device chassis. The Steam Machine GPU has explicit dimensions of 156 mm by 152 mm by 162 mm, a standalone card format with one HDMI 2.1a and one DisplayPort 2.1 output.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Neither includes tensor cores. The RX 7800M's memory clock runs at 2250 MHz with 18 Gbps effective speed, matching the Steam Machine GPU's memory clock and effective speed. The RX 7800M's 192-bit memory bus versus the Steam Machine GPU's 128-bit bus accounts for their bandwidth difference. The RX 7800M's 28,100 million transistors versus 13,300 million represents a 2.1x transistor count advantage, consistent with its larger core configuration.

The RX 7800M released on September 10, 2024, and lists its predecessor as Polaris Mobile. The Steam Machine GPU has a release date of June 28, 2026, with no predecessor or successor listed. Both are marked as active in production. The RX 7800M's TDP of 180 W exceeds the Steam Machine GPU's 110 W, reflecting the larger core and higher performance ceiling.

FAQ

Q: Which GPU has higher benchmark scores?

A: The RX 7800M has an average benchmark score of 27,883 across ten tests, while the Steam Machine GPU has no recorded benchmark scores, resulting in an average of zero. The RX 7800M's percentile ranking is 73 versus 50 for the Steam Machine GPU.

Q: How do their compute capabilities compare?

A: The RX 7800M delivers 35.87 TFLOPS FP32 and 35.87 TFLOPS FP16 with 1:1 ratio. The Steam Machine GPU provides 17.56 TFLOPS FP32 and 17.56 TFLOPS FP16. The RX 7800M has 3840 shading units, 240 TMUs, and 96 ROPs, compared to 1792 shading units, 112 TMUs, and 64 ROPs on the Steam Machine GPU.

Q: What are the memory specifications for each?

A: The RX 7800M has 12 GB GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth. The Steam Machine GPU has 8 GB GDDR6 on a 128-bit bus with 288.0 GB/s bandwidth. Both run memory at 2250 MHz with 18 Gbps effective speed.

Q: Which GPU has higher clock speeds?

A: The Steam Machine GPU has higher clocks: 1720 MHz base, 2450 MHz boost, and 2250 MHz game clock. The RX 7800M runs at 1295 MHz base, 2335 MHz boost, and 2145 MHz game clock. The RX 7800M's lower clocks are offset by its larger core configuration.

Q: How do their process nodes and die sizes differ?

A: The RX 7800M uses a 5 nm TSMC process with a 346 mm² die and 28,100 million transistors. The Steam Machine GPU uses a 6 nm TSMC process with a 204 mm² die and 13,300 million transistors. Transistor density is 81.2M per square millimeter for the RX 7800M and 65.2M for the Steam Machine GPU.

Q: What are their power requirements and physical formats?

A: The RX 7800M has a 180 W TDP, is an IGP with no power connectors, and its display outputs are portable device dependent. The Steam Machine GPU has a 110 W TDP, no power connectors, and dimensions of 156 mm by 152 mm by 162 mm with one HDMI 2.1a and one DisplayPort 2.1 output.

Where Each One Wins

The RX 7800M wins in every measured performance category based on available data. Its FP32 compute of 35.87 TFLOPS is double the Steam Machine GPU's 17.56 TFLOPS. The pixel rate of 224.2 GPixel/s versus 156.8 GPixel/s gives the RX 7800M a 43% advantage in fill-rate-bound scenarios. Texture rate of 560.4 GTexel/s versus 274.4 GTexel/s doubles the texture filtering throughput. Memory bandwidth of 432.0 GB/s versus 288.0 GB/s provides a 50% advantage for bandwidth-sensitive workloads like high-resolution textures and large frame buffers.

The RX 7800M's 12 GB memory capacity versus 8 GB gives it more headroom for modern game assets and compute datasets. Its 60 ray tracing cores versus 28 suggest stronger ray-traced rendering performance, though no direct benchmark confirms this. The PassMark DirectX 11 score of 176 and DirectX 9 score of 174 show legacy API strength, while the DirectX 12 score of 89 indicates newer API workloads are comparatively weaker, though still functional. The Geekbench Vulkan score of 126,668 outpaces the OpenCL score of 120,778, favoring Vulkan-based applications.

The Steam Machine GPU wins on efficiency and physical integration. Its 110 W TDP is 39% lower than the RX 7800M's 180 W, enabling smaller cooling solutions and lower system power draw. Its compact dimensions of 156 mm by 152 mm by 162 mm suit small-form-factor builds. The fixed display outputs of one HDMI 2.1a and one DisplayPort 2.1 provide plug-and-play connectivity without adapter dependencies. Higher clock speeds of 2450 MHz boost and 2250 MHz game clock suggest better per-core efficiency, partially mitigating its smaller core count in lightly threaded workloads.

The RX 7800M's nearest rivals show it sits within 0.8% of four competing GPUs, indicating tight competition at its performance level. The Steam Machine GPU's lack of benchmark data and rival comparisons leaves its relative standing undefined beyond the 50th percentile. For users choosing between these two, the RX 7800M dominates in compute, memory, and rendering resources, while the Steam Machine GPU offers a lower-power, self-contained package with newer release timing and a smaller physical footprint.