AMD Radeon HD 7770M vs AMD Radeon RX 9070 XT Comparison

The AMD Radeon RX 9070 XT and the AMD Radeon HD 7770M sit at opposite ends of the hardware spectrum, yet benchmark data places them within 0.1% of each other in average score. The RX 9070 XT averages 13,543 points, while the HD 7770M averages 13,536 points. This near-parity is a statistical artifact of the sparse testing on the older mobile part, but it frames a comparison that spans a 13-year generational gap, a 4nm versus 28nm process node, and a 304W desktop flagship against a 32W notebook chip.

Head-to-Head Benchmarks

The data shows a stark contrast in available benchmark coverage. The RX 9070 XT has a full suite of ten tests spanning DirectX 9 through DirectX 12, OpenCL, Vulkan, and compute workloads. The HD 7770M has exactly one recorded benchmark result: a Geekbench Metal score of 13,536. This single data point anchors its average, while the RX 9070 XT’s average is derived from a diverse workload set.

In the only comparable metric—the aggregate average—the RX 9070 XT leads by a razor-thin margin of 7 points (13,543 vs 13,536), representing a 0.1% delta. The nearestRivals data confirms this: the RX 9070 XT is 0.1% ahead of the HD 7770M, while the HD 7770M is 0.1% behind the RX 9070 XT. For context, both cards sit within a 1% band of the NVIDIA GeForce GTX 570 (13,515) and the NVIDIA P106-090 (13,470), with the AMD Radeon Pro 555 (13,407) trailing by 1%.

The RX 9070 XT’s individual benchmark results reveal its actual performance profile. In PassMark G3D, it scores 26,795, a figure that dwarfs its own PassMark DirectX 11 result of 292 and DirectX 9 result of 353. Its Geekbench Vulkan score of 65,879 is nearly four times its OpenCL score of 17,428, indicating strong hardware-accelerated graphics API performance. The 3DMark Steel Nomad DX12 score of 7,260 represents modern rasterization workloads, while the PassMark GPU Compute score of 15,864 shows substantial compute throughput.

The HD 7770M’s sole Geekbench Metal score of 13,536 is its entire statistical existence. There are no DirectX, OpenCL, or Vulkan results recorded for this part, no PassMark scores, and no 3DMark data. This means the head-to-head comparison is effectively a comparison of a comprehensive modern test suite against a single legacy mobile benchmark. The 0.1% delta in average scores does not reflect real-world performance parity; it reflects the incompleteness of the older card’s data set.

Where the RX 9070 XT wins decisively is in raw throughput metrics that are part of its specification, not its benchmark suite. Its FP32 compute is 48.66 TFLOPS, its pixel rate is 380.2 GPixel/s, and its texture rate is 760.3 GTexel/s. The HD 7770M manages 691.2 GFLOPS FP32, 10.80 GPixel/s, and 21.60 GTexel/s. In every measurable throughput category, the RX 9070 XT leads by orders of magnitude—71x in FP32, 35x in pixel rate, and 35x in texture rate.

The Verdict

The data presents a clear verdict for different audiences. The AMD Radeon RX 9070 XT is the only choice for anyone running modern DirectX 12 Ultimate workloads, Vulkan 1.4 applications, or demanding compute tasks. Its benchmark suite shows scores ranging from 78 in PassMark DirectX 12 to 65,879 in Geekbench Vulkan, with a PassMark G3D score of 26,795 that indicates robust real-world gaming performance. It is an active production part with a 55th percentile ranking among all GPUs.

The AMD Radeon HD 7770M, with its 54th percentile ranking and end-of-life production status, is a legacy mobile part. Its single Geekbench Metal score of 13,536 tells us it can execute that specific benchmark, but nothing more. For a user with a 2012-era laptop that still functions, the data confirms the card is operational. For anyone building or buying a system today, the HD 7770M has no competitive standing.

The practical verdict: the RX 9070 XT is the definitive choice for contemporary gaming and compute, while the HD 7770M belongs in historical context. The 0.1% average score delta is a statistical curiosity, not a performance equivalence. The RX 9070 XT’s 55th percentile versus the HD 7770M’s 54th percentile confirms the modern card ranks higher despite the near-identical averages, a situation driven entirely by the older card’s incomplete benchmark coverage.

Architecture Differences

The architecture gap is generational. The RX 9070 XT uses RDNA 4.0 on a 4nm TSMC process, housing 53,900 million transistors on a 357 mm² die. The HD 7770M uses GCN 1.0 on a 28nm TSMC process, with 1,500 million transistors on a 123 mm² die. The transistor density tells the story: 151.0M transistors per mm² for the RX 9070 XT versus 12.2M per mm² for the HD 7770M—a 12.4x density advantage for the newer part.

The RX 9070 XT’s Navi 48 chip belongs to the Navi IV (RX 9000) generation, succeeding Navi III. The HD 7770M’s Chelsea chip belongs to the London (HD 7700M) generation, succeeding Vancouver and succeeded by Solar System. The RX 9070 XT includes 64 dedicated ray tracing cores, a feature entirely absent from the HD 7770M, which has no RT cores listed. Both lack tensor cores.

API support reflects the architecture evolution. The RX 9070 XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The HD 7770M supports DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.170. The jump from Vulkan 1.2.170 to 1.4 and from DirectX 11_1 to 12_2 represents significant feature-level advances, including mesh shaders, variable rate shading, and improved ray tracing support on the newer card.

Memory architecture differs fundamentally. The RX 9070 XT uses 16 GB of GDDR6 on a 256-bit bus with 644.6 GB/s bandwidth. The HD 7770M uses 1 GB of GDDR5 on a 128-bit bus with 64.00 GB/s bandwidth. The RX 9070 XT has 16x the memory capacity and 10x the bandwidth. Its shading unit count is 4,096 versus 512, its TMUs number 256 versus 32, and its ROPs total 128 versus 16.

Specification Differences

The specification table shows differences in nearly every field. The RX 9070 XT operates at a 1660 MHz base clock, 2970 MHz boost clock, and 2400 MHz game clock. The HD 7770M lists no base, boost, or game clocks in the data. Memory clocks differ: the RX 9070 XT runs at 2518 MHz (20.1 Gbps effective), while the HD 7770M runs at 1000 MHz (4 Gbps effective).

Power characteristics diverge sharply. The RX 9070 XT has a 304W TDP, requires a 700W suggested PSU, uses dual-slot cooling, and needs two 8-pin power connectors. The HD 7770M has a 32W TDP, no listed PSU requirement, no slot width, and no power connectors—consistent with a mobile part drawing power through the laptop’s motherboard. The RX 9070 XT consumes 9.5x the power of the HD 7770M.

Bus interface and display outputs also differ. The RX 9070 XT uses PCIe 5.0 x16 and provides 1x HDMI 2.1b and 3x DisplayPort 2.1a outputs. The HD 7770M uses PCIe 2.0 x16 and lists its display outputs as "Portable Device Dependent," meaning the laptop manufacturer determines the physical ports. The RX 9070 XT was released on 2025-03-05, while the HD 7770M was released on 2012-04-23. The RX 9070 XT has a launch MSRP of 599 USD; the HD 7770M has no listed launch MSRP.

FAQ

Q: How much faster is the RX 9070 XT than the HD 7770M in average benchmark scores?

A: The RX 9070 XT averages 13,543 points versus 13,536 for the HD 7770M, a delta of 0.1%. This near-parity is misleading because the HD 7770M has only one recorded benchmark (Geekbench Metal), while the RX 9070 XT has ten recorded benchmarks across multiple APIs.

Q: What is the single biggest performance difference between these two cards?

A: The FP32 compute throughput shows the largest gap: the RX 9070 XT delivers 48.66 TFLOPS versus 691.2 GFLOPS for the HD 7770M, a roughly 70x difference. Pixel rate (380.2 vs 10.80 GPixel/s) and texture rate (760.3 vs 21.60 GTexel/s) both show approximately 35x gaps.

Q: Do both cards support ray tracing?

A: No. The RX 9070 XT has 64 dedicated ray tracing cores. The HD 7770M lists no ray tracing cores in its specifications. This is an architectural feature introduced in the RDNA generation that the older GCN 1.0 architecture lacks.

Q: Which card has better memory bandwidth?

A: The RX 9070 XT offers 644.6 GB/s bandwidth from 16 GB of GDDR6 on a 256-bit bus. The HD 7770M offers 64.00 GB/s bandwidth from 1 GB of GDDR5 on a 128-bit bus. The RX 9070 XT has 10x the bandwidth and 16x the capacity.

Q: What is the production status of each card?

A: The RX 9070 XT is listed as "Active" production. The HD 7770M is listed as "End-of-life." The RX 9070 XT was released on 2025-03-05, while the HD 7770M was released on 2012-04-23.

Q: How do these cards rank among all GPUs?

A: The RX 9070 XT sits at the 55th percentile among all GPUs. The HD 7770M sits at the 54th percentile. The 1 percentile point difference is the smallest margin in the nearestRivals data, which also includes the NVIDIA GeForce GTX 570, NVIDIA P106-090, and AMD Radeon Pro 555 within a 1% delta band.