AMD Radeon RX 7800 XT vs AMD Ryzen Z2 GPU Comparison

The Verdict

The AMD Radeon RX 7800 XT and the AMD Ryzen Z2 GPU serve fundamentally different purposes, and the data makes the separation clear. The RX 7800 XT is a desktop graphics card with a comprehensive benchmark profile, while the Ryzen Z2 GPU is a console-class processor with zero recorded benchmark scores in the database. For any application requiring measured graphics performance, the RX 7800 XT is the only viable choice, as it holds a 51st percentile ranking among all GPUs, while the Ryzen Z2 GPU sits at the 50th percentile with an average benchmark score of zero.

The Ryzen Z2 GPU, however, is not a failed product; it is a different class of component. Its 28 W thermal design power, 16 GB of LPDDR5X memory, and single USB Type-C display output indicate a low-power, integrated solution for handheld or compact console designs. The RX 7800 XT, with its 263 W TDP, dual-slot cooler, and dual 8-pin power connectors, is a high-performance add-in board. The verdict is straightforward: choose the RX 7800 XT for desktop gaming and compute workloads where benchmark scores matter, and consider the Ryzen Z2 GPU only for power-constrained, integrated applications where the RX 7800 XT's physical size and power requirements make it unsuitable.

Where Each One Wins

The RX 7800 XT wins in every measurable performance category, but the Ryzen Z2 GPU wins in efficiency and integration. The RX 7800 XT delivers 37.32 TFLOPS of FP32 compute, compared to 8.294 TFLOPS for the Ryzen Z2 GPU, a 4.5 times advantage. Its texture rate of 583.2 GTexel/s dwarfs the Ryzen Z2 GPU's 129.6 GTexel/s, and its pixel rate of 233.3 GPixel/s is 2.7 times higher than the Ryzen Z2 GPU's 86.40 GPixel/s. Memory bandwidth tells a similar story: 624.1 GB/s versus 119.9 GB/s, with the RX 7800 XT using a 256-bit bus versus the Ryzen Z2 GPU's 128-bit bus.

The Ryzen Z2 GPU wins on power efficiency and physical footprint. Its 28 W TDP is less than one-ninth of the RX 7800 XT's 263 W draw. The Ryzen Z2 GPU uses a 4 nm process node versus the RX 7800 XT's 5 nm node, achieving a higher transistor density of 142.6M per mm² versus 81.2M per mm². The Ryzen Z2 GPU also has no power connectors, no slot width requirement, and no suggested PSU, making it suitable for embedded or mobile designs. The RX 7800 XT, by contrast, requires a 600 W suggested PSU and a dual-slot chassis.

Architecture Differences

Both components use AMD's RDNA 3.0 architecture, but they are built on different process nodes and chips. The RX 7800 XT uses the Navi 32 chip on TSMC's 5 nm process, with a die size of 346 mm² and 28,100 million transistors. The Ryzen Z2 GPU uses the Hawk Point chip on TSMC's 4 nm process, with a die size of 178 mm² and 25,390 million transistors. The smaller die with nearly as many transistors gives the Ryzen Z2 GPU a much higher transistor density, but the RX 7800 XT's larger die accommodates far more execution resources.

The RX 7800 XT features 3,840 shading units, 240 texture mapping units, 96 render output units, and 60 ray tracing cores. The Ryzen Z2 GPU has 768 shading units, 48 TMUs, 32 ROPs, and 12 ray tracing cores. This represents a 5 times difference in shading units and TMUs, and a 3 times difference in ROPs and ray tracing cores. Clock speeds differ in interesting ways: the RX 7800 XT has a higher base clock at 1295 MHz versus 800 MHz, but the Ryzen Z2 GPU has a higher boost clock at 2700 MHz versus 2430 MHz. The RX 7800 XT also specifies a game clock of 2124 MHz, which the Ryzen Z2 GPU lacks entirely.

Memory architecture diverges sharply. The RX 7800 XT uses 16 GB of GDDR6 on a 256-bit bus with 624.1 GB/s bandwidth. The Ryzen Z2 GPU uses 16 GB of LPDDR5X on a 128-bit bus with 119.9 GB/s bandwidth. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, but the RX 7800 XT offers display outputs of 1x HDMI 2.1a and 3x DisplayPort 2.1, while the Ryzen Z2 GPU offers a single USB Type-C output. The RX 7800 XT connects via PCIe 4.0 x16; the Ryzen Z2 GPU has no bus interface specified.

FAQ

Q: Which GPU is faster for gaming?

A: The RX 7800 XT, based on all recorded benchmarks. It scores 4157 in 3DMark Steel Nomad DX12, 54228 in Geekbench Vulkan, and 24176 in Passmark G3D. The Ryzen Z2 GPU has no benchmark scores recorded, so no comparison is possible.

Q: Can the Ryzen Z2 GPU replace the RX 7800 XT in a desktop PC?

A: No. The RX 7800 XT requires a dual-slot slot width, 2x 8-pin power connectors, and a 600 W suggested PSU. The Ryzen Z2 GPU has no power connectors and no slot width, but it also has no bus interface specified, making it unsuitable for standard desktop expansion slots.

Q: How do their memory systems compare?

A: Both have 16 GB, but the RX 7800 XT uses GDDR6 with a 256-bit bus and 624.1 GB/s bandwidth, while the Ryzen Z2 GPU uses LPDDR5X with a 128-bit bus and 119.9 GB/s bandwidth. The RX 7800 XT has over 5 times the memory bandwidth.

Q: Which is more power efficient?

A: The Ryzen Z2 GPU, with a 28 W TDP versus the RX 7800 XT's 263 W TDP. The Ryzen Z2 GPU also uses a smaller 4 nm process node with higher transistor density, contributing to its lower power draw.

Q: What is the compute performance difference?

A: The RX 7800 XT delivers 37.32 TFLOPS FP32 and FP16 (1:1), while the Ryzen Z2 GPU delivers 8.294 TFLOPS FP32 and FP16 (1:1). The RX 7800 XT is 4.5 times faster in raw compute.

Q: Are the architectures the same?

A: Both use RDNA 3.0, but the RX 7800 XT uses the Navi 32 chip (5 nm) and the Ryzen Z2 GPU uses the Hawk Point chip (4 nm). The RX 7800 XT has 5 times more shading units and TMUs, and 3 times more ROPs and ray tracing cores.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries between these two components, and the Ryzen Z2 GPU has no individual benchmark scores at all. The comparison therefore relies on the RX 7800 XT's recorded performance profile and the architectural specifications of both.

The RX 7800 XT's strongest benchmark results come from Geekbench Vulkan, where it scores 54228, and Passmark G3D, where it scores 24176. Its 3DMark Steel Nomad DX12 score of 4157 places it in a competitive range for modern DirectX workloads. The Passmark suite shows a mixed profile: 304 in DirectX 9, 249 in DirectX 11, 121 in DirectX 10, and 93 in DirectX 12, with a GPU compute score of 13473 and a G2D score of 1177. Geekbench OpenCL adds 18290 points.

The nearest rivals in the database for the RX 7800 XT are the NVIDIA GeForce GTX 1660, the AMD Radeon Pro 5500M, the NVIDIA Tesla K20c, and the AMD Radeon RX 6500 XT. The RX 7800 XT's average benchmark score of 11627 is 0.5 percent below the GTX 1660's 11680, 0.9 percent above the Radeon Pro 5500M's 11528, 1.3 percent above the Tesla K20c's 11479, and 1.8 percent below the RX 6500 XT's 11842. These deltas are all within roughly two percent, indicating that the RX 7800 XT sits in a tightly contested performance band despite its 51st percentile ranking.

The Ryzen Z2 GPU's average benchmark score is zero, and it has no nearest rivals listed. Its 50th percentile ranking appears to be a default value rather than a measured position. The only quantitative performance indicators are its architectural specifications: 8.294 TFLOPS FP32, 129.6 GTexel/s texture rate, and 86.40 GPixel/s pixel rate. These figures place it well below the RX 7800 XT in every throughput metric.

Specification Differences

The two components differ across nearly every specification field. The RX 7800 XT belongs to the Radeon RX 7000 series with the Navi III (RX 7000) generation and the codename Wheat Nas. The Ryzen Z2 GPU is a Console GPU (AMD) generation product with no series, codename, predecessor, or successor listed. Both use TSMC as foundry, but on different nodes: 5 nm for the RX 7800 XT and 4 nm for the Ryzen Z2 GPU.

Clock specifications show a split. The RX 7800 XT runs at 1295 MHz base, 2124 MHz game, and 2430 MHz boost, with memory at 2438 MHz (19.5 Gbps effective). The Ryzen Z2 GPU runs at 800 MHz base and 2700 MHz boost, with no game clock specified and memory at 937 MHz (7.5 Gbps effective). The RX 7800 XT's boost clock is lower, but its base clock is 62 percent higher, and it maintains a higher sustained game clock.

Memory configurations differ in type and bus width: 16 GB GDDR6 on a 256-bit bus for the RX 7800 XT versus 16 GB LPDDR5X on a 128-bit bus for the Ryzen Z2 GPU. Bandwidth is 624.1 GB/s versus 119.9 GB/s. The RX 7800 XT has 3,840 shading units, 240 TMUs, 96 ROPs, and 60 ray tracing cores; the Ryzen Z2 GPU has 768 shading units, 48 TMUs, 32 ROPs, and 12 ray tracing cores.

Power and physical specifications diverge completely. The RX 7800 XT has a 263 W TDP, dual-slot width, 2x 8-pin power connectors, a 600 W suggested PSU, and dimensions of 267 mm length, 111 mm height, and 50 mm width. The Ryzen Z2 GPU has a 28 W TDP, no slot width, no power connectors, no suggested PSU, and no dimensions recorded. The RX 7800 XT uses PCIe 4.0 x16 and offers 1x HDMI 2.1a plus 3x DisplayPort 2.1 outputs. The Ryzen Z2 GPU has no bus interface and offers a single USB Type-C output.

The RX 7800 XT has a launch MSRP of 499 USD and a release date of 2023-09-05, with a predecessor of Navi II and a successor of Navi IV. The Ryzen Z2 GPU has no launch MSRP, a release date of 2024-12-31, and no predecessor or successor. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RX 7800 XT's production status is Active, as is the Ryzen Z2 GPU's.