AMD Radeon RX 7700S vs AMD Radeon RX Vega 56 Comparison

The AMD Radeon RX Vega 56 and the AMD Radeon RX 7700S represent two distinct generations of AMD graphics technology, separated by nearly six years of architectural evolution. The Vega 56, a desktop enthusiast card from the GCN 5.0 era, relies on a massive 495 mm² die and HBM2 memory, while the 7700S is a modern RDNA 3.0 mobile solution built on a compact 204 mm² chip with GDDR6. Benchmark data reveals that the newer 7700S decisively outperforms the older Vega 56 in the available head-to-head metric, yet the two cards occupy surprisingly similar positions in the overall performance distribution, with the Vega 56 holding an 81st percentile rank versus the 7700S's 78th percentile.

Where Each One Wins

The sole direct comparison available is the 3DMark Steel Nomad DX12 test, and in this benchmark, the AMD Radeon RX 7700S is the clear victor. The 7700S scores 2185 points, while the Vega 56 manages only 1501 points, resulting in a delta of -31.3% for the older card. This is a substantial margin, indicating that the RDNA 3.0 architecture delivers a significant generational leap in raw synthetic performance despite the Vega 56 having nearly double the shading units (3584 vs 2048) and a much wider 2048-bit memory bus.

However, the overall benchmark picture is more nuanced than a single test suggests. The Vega 56's average benchmark score across all tests is 37507, which is actually higher than the 7700S's average of 33849. This discrepancy arises because the two cards were tested under different benchmark suites. The Vega 56 has results in 3DMark Steel Nomad and Geekbench Metal, where it scores 73512, while the 7700S has results in 3DMark Steel Nomad, Geekbench OpenCL (62983), and Geekbench Vulkan (36380). The Metal API test appears to be particularly favorable to the Vega 56, suggesting that in Apple ecosystem workloads, the older card may still hold an advantage.

The wins are therefore split by workload type. The 7700S wins decisively in the modern DirectX 12 Steel Nomad test, which likely reflects its superior ray tracing capabilities (32 RT cores vs none) and higher boost clock (2500 MHz vs 1471 MHz). The Vega 56, conversely, may win in compute-oriented Metal workloads, as its 10.54 TFLOPS FP32 performance and 409.6 GB/s memory bandwidth are substantial, though the 7700S actually has higher theoretical FP32 throughput at 20.48 TFLOPS. The data available does not provide a direct Metal comparison, so the Vega 56's advantage in that specific test is not directly contradicted.

The Verdict

For users seeking maximum performance in modern DirectX 12 gaming workloads, the data unequivocally favors the AMD Radeon RX 7700S. Its 31.3% lead in 3DMark Steel Nomad is not a marginal difference; it represents a full generational shift in rendering efficiency. The 7700S achieves this with a dramatically lower power envelope (100 W TDP vs 210 W), making it a superior choice for any system where thermal management or battery life is a concern.

The AMD Radeon RX Vega 56 remains a viable option only in very specific scenarios. Its higher average benchmark score (37507 vs 33849) suggests that in certain legacy or API-specific workloads, particularly those relying on Metal, it may still outperform the newer card. Additionally, the Vega 56's 8 GB of HBM2 memory offers 409.6 GB/s of bandwidth, which is 42% higher than the 7700S's 288.0 GB/s. For compute tasks that are memory-bandwidth bound rather than shading-bound, this could translate to real-world advantages.

The percentile rankings are telling: the Vega 56 sits at the 81st percentile of all GPUs, while the 7700S is at the 78th percentile. This indicates that despite the 7700S winning the head-to-head test, the Vega 56 is still a formidable performer in the broader GPU landscape. The nearest rivals for the Vega 56 include the NVIDIA GeForce RTX 4070 (delta -0.4%) and the RTX 4080 Mobile (delta -1.6%), suggesting it competes with modern mid-range and upper-mobile offerings. The 7700S's nearest rivals include the AMD Radeon RX 480 (delta -0.4%) and the NVIDIA GTX 1060 5 GB (delta 0.5%), placing it in a lower performance tier overall.

The verdict is clear: choose the 7700S for modern gaming and efficiency, choose the Vega 56 if you have legacy workloads that favor its specific architecture, or if you need maximum memory bandwidth for compute tasks.

Head-to-Head Benchmarks

The only direct head-to-head benchmark in the data is 3DMark Steel Nomad DX12, and the results are stark. The AMD Radeon RX 7700S scores 2185, while the AMD Radeon RX Vega 56 scores 1501. This represents a 31.3% advantage for the newer card, a margin so large that it cannot be attributed to driver optimizations or test variance; it is a fundamental architectural superiority in rendering modern DirectX 12 scenes.

To contextualize this score, consider the Vega 56's nearest rivals. Its average score of 37507 places it just 0.3% behind the NVIDIA Tesla P4 (37628) and 0.4% behind the GeForce RTX 4070 (37648). This means the Vega 56, despite being end-of-life and launched in 2017, performs on par with a modern RTX 4070 in the aggregate benchmarks. Meanwhile, the 7700S's average score of 33849 puts it 0.3% behind the AMD Radeon HD 7950 (33951) and 0.4% behind the RX 480 (33997). This is a significant drop in overall tier, suggesting that while the 7700S wins the Steel Nomad test, its overall performance profile is closer to older mid-range cards.

The delta of -31.3% in Steel Nomad is the only quantitative comparison available, but it is highly informative. The 7700S's victory is driven by its RDNA 3.0 architecture, which features a 2500 MHz boost clock versus the Vega 56's 1471 MHz, and a higher texture rate (320.0 GTexel/s vs 329.5 GTexel/s, though the Vega 56 is marginally ahead here). The pixel rate also favors the 7700S at 160.0 GPixel/s versus 94.14 GPixel/s, a 70% advantage. These raw throughput numbers, combined with the 7700S's 32 ray tracing cores, explain why it dominates in a modern DX12 workload that likely leverages these features.

FAQ

Q: Which card has a higher benchmark score in 3DMark Steel Nomad?

A: The AMD Radeon RX 7700S scores 2185 points, while the AMD Radeon RX Vega 56 scores 1501 points, giving the 7700S a 31.3% advantage in this test.

Q: How do their average benchmark scores compare?

A: The Vega 56 has a higher average score of 37507 compared to the 7700S's 33849. However, these averages are drawn from different test suites; the Vega 56 includes a Geekbench Metal result, while the 7700S includes OpenCL and Vulkan results.

Q: What is the memory bandwidth difference?

A: The Vega 56 features 8 GB of HBM2 memory on a 2048-bit bus, delivering 409.6 GB/s of bandwidth. The 7700S has 8 GB of GDDR6 on a 128-bit bus, providing 288.0 GB/s. The Vega 56 thus offers 42% more memory bandwidth.

Q: Which card supports ray tracing?

A: Only the AMD Radeon RX 7700S has dedicated ray tracing cores (32 RT cores). The Vega 56 has no RT cores listed. The 7700S also supports DirectX 12 Ultimate (12_2), while the Vega 56 only supports DirectX 12 (12_1).

Q: How do their power requirements differ?

A: The Vega 56 has a TDP of 210 W and requires two 8-pin power connectors and a 550 W suggested PSU. The 7700S has a TDP of 100 W, uses no external power connectors, and has no suggested PSU listed, reflecting its mobile IGP form factor.

Q: What are their production and release statuses?

A: The Vega 56 was released on 2017-08-13 and is end-of-life, with its launch MSRP at 399 USD. The 7700S was released on 2023-01-03 and is still active in production.

Architecture Differences

The two cards represent fundamentally different design philosophies. The AMD Radeon RX Vega 56 is built on the Vega 10 chip using the GCN 5.0 architecture, fabricated on a 14 nm process at GlobalFoundries. This is a massive die measuring 495 mm², housing 12,500 million transistors at a density of 25.3 million per mm². The 7700S, in contrast, uses the Navi 33 chip with RDNA 3.0 architecture, fabricated on a 6 nm process at TSMC. This die is much smaller at 204 mm², but packs 13,300 million transistors, achieving a density of 65.2 million per mm² — nearly 2.6 times higher.

The shader configuration differs significantly. The Vega 56 has 3584 shading units, 224 TMUs, and 64 ROPs. The 7700S has only 2048 shading units and 128 TMUs, but retains 64 ROPs. Despite fewer shading units, the 7700S achieves higher raw throughput due to its much higher clock speeds: 1500 MHz base and 2500 MHz boost (with 2200 MHz game clock) versus 1156 MHz base and 1471 MHz boost on the Vega 56. This results in the 7700S delivering 20.48 TFLOPS FP32 versus 10.54 TFLOPS on the Vega 56, a 94% advantage.

Memory architecture is another major differentiator. The Vega 56 uses 8 GB of HBM2 on a 2048-bit bus, running at 800 MHz (1600 Mbps effective), yielding 409.6 GB/s bandwidth. The 7700S uses 8 GB of GDDR6 on a 128-bit bus, running at 2250 MHz (18 Gbps effective), yielding 288.0 GB/s. The Vega 56's memory bandwidth is superior, but the 7700S's GDDR6 is more power-efficient and cost-effective.

The cards also differ in interface and features. The Vega 56 uses PCIe 3.0 x16, while the 7700S uses PCIe 4.0 x16. The Vega 56 is a dual-slot card with 2x 8-pin power connectors, a 210 W TDP, and outputs including 1x HDMI 2.0b and 3x DisplayPort 1.4a. The 7700S is an IGP (integrated graphics processor) with no power connectors, a 100 W TDP, and display outputs that are "Portable Device Dependent." The 7700S supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Vega 56 supports DirectX 12 (12_1) and Vulkan 1.3. Both support OpenGL 4.6. The Vega 56 has no RT cores, while the 7700S has 32, marking a clear generational shift toward hardware-accelerated ray tracing.