Radeon Pro 555X vs Radeon HD 6990
Radeon Pro 555X
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Radeon HD 6990
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Performance Spectrum - GPU
About G3D Mark
G3D Mark is a standard benchmark that measures graphics performance in real-world gaming scenarios. It simplifies comparing cards from different brands, where higher scores directly correlate with better fps and smoother gaming experiences.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (G3D Mark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar
Performance Per Dollar
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
⚠️ Generational Difference
The Radeon Pro 555X is significantly newer (2018 vs 2011). The Radeon Pro 555X likely supports modern features like Ray Tracing, Tensor Cores, and DLSS/FSR upscaling, which act as force multipliers for performance. The Radeon HD 6990 lacks this hardware feature set, limiting its longevity in modern titles despite any raw power similarities.
🚀 Performance Leadership
The Radeon HD 6990 is the superior choice for raw performance. It leads with a 0.5% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon Pro 555X.
| Insight | Radeon Pro 555X | Radeon HD 6990 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-0.5%) | ✅Leading raw performance (+0.5%) |
| Longevity | 🛑Obsolete Architecture (2018 / GCN 4.0 (2016−2020)) | 🛑Obsolete Architecture (2011 / TeraScale 3 (2010−2013)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+0%) |
| Efficiency | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| Case Fit | — | Standard Size (310mm) |
💎 Value Proposition
The Radeon HD 6990 offers a compelling cost-to-performance ratio. Priced at $498 versus $1,049 for the Radeon Pro 555X, it costs 53% less. While it maintains basic entry-level capabilities, this results in a 111.6% higher cost efficiency score.
| Insight | Radeon Pro 555X | Radeon HD 6990 |
|---|---|---|
| Cost Efficiency | ❌Lower cost efficiency | ✅Better overall value (+111.6%) |
| Upfront Cost | ⚠️Higher upfront cost ($1,049) | ✅More affordable ($498) |
Performance Check
Real-world benchmarks and performance projections based on comprehensive hardware analysis and comparative metrics. Values represent expected performance on High/Ultra settings at 1080p, 1440p, and 4K. Modeled using a Ryzen 7 7800X3D reference profile to minimize specific CPU bottlenecks.
Note: Performance behavior can vary per game. Specific architectures may perform better or worse depending on game engine optimizations and API implementation.
Technical Specifications
Side-by-side comparison of Radeon Pro 555X and Radeon HD 6990
Radeon Pro 555X
The Radeon Pro 555X is manufactured by AMD. It was released in July 16 2018. It features the GCN 4.0 architecture. The core clock speed is 907 MHz. It has 768 shading units. The thermal design power (TDP) is 75W. Manufactured using 14 nm process technology. G3D Mark benchmark score: 3,000 points.
Radeon HD 6990
The Radeon HD 6990 is manufactured by AMD. It was released in March 8 2011. It features the TeraScale 3 architecture. The core clock speed is 830 MHz. It has 1536 ×2 shading units. The thermal design power (TDP) is 375W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 3,014 points. Launch price was $699.
Graphics Performance
The Radeon Pro 555X scores 3,000 and the Radeon HD 6990 reaches 3,014 in the G3D Mark benchmark — just a 0.5% difference, making them near-identical in rasterization performance. The Radeon Pro 555X is built on GCN 4.0 while the Radeon HD 6990 uses TeraScale 3, both on 14 nm vs 40 nm. Shader units: 768 (Radeon Pro 555X) vs 1,536 (Radeon HD 6990). Raw compute: 1.393 TFLOPS (Radeon Pro 555X) vs 2.55 TFLOPS ×2 (Radeon HD 6990).
| Feature | Radeon Pro 555X | Radeon HD 6990 |
|---|---|---|
| G3D Mark Score | 3,000 | 3,014 |
| Architecture | GCN 4.0 | TeraScale 3 |
| Process Node | 14 nm | 40 nm |
| Shading Units | 768 | 1536 ×2+100% |
| Compute (TFLOPS) | 1.393 TFLOPS | 2.55 TFLOPS ×2+83% |
| ROPs | 16 | 32 ×2+100% |
| TMUs | 48 | 96 ×2+100% |
| L1 Cache | 192 KB | 384 KB+100% |
| L2 Cache | 1 MB+100% | 0.5 MB |
Advanced Features (DLSS/FSR)
| Feature | Radeon Pro 555X | Radeon HD 6990 |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 1.0 (Software) |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | AMD Anti-Lag | AMD Anti-Lag |
Video Memory (VRAM)
Both cards feature 2 GB of GDDR5. Bus width: 64-bit vs 128-bit. L2 Cache: 1 MB (Radeon Pro 555X) vs 0.5 MB (Radeon HD 6990) — the Radeon Pro 555X has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Radeon Pro 555X | Radeon HD 6990 |
|---|---|---|
| VRAM Capacity | 2 GB | 2 GB |
| Memory Type | GDDR5 | GDDR5 |
| Bus Width | 64-bit | 128-bit+100% |
| L2 Cache | 1 MB+100% | 0.5 MB |
Power & Dimensions
The Radeon Pro 555X draws 75W versus the Radeon HD 6990's 375W — a 133.3% difference. The Radeon Pro 555X is more power-efficient. Recommended PSU: 350W (Radeon Pro 555X) vs 750W (Radeon HD 6990). Power connectors: PCIe-powered vs 2x 8-pin.
| Feature | Radeon Pro 555X | Radeon HD 6990 |
|---|---|---|
| TDP | 75W-80% | 375W |
| Recommended PSU | 350W-53% | 750W |
| Power Connector | PCIe-powered | 2x 8-pin |
| Length | — | 310mm |
| Height | — | 115mm |
| Slots | — | 2 |
| Temp (Load) | — | 85 |
| Perf/Watt | 40.0+400% | 8.0 |
Value Analysis
The Radeon Pro 555X launched at $0 MSRP and currently averages $1049, while the Radeon HD 6990 launched at $699 and now averages $498. The Radeon HD 6990 costs 52.5% less ($551 savings) at current market prices. Performance per dollar (G3D Mark / price): 2.9 (Radeon Pro 555X) vs 6.1 (Radeon HD 6990) — the Radeon HD 6990 offers 110.3% better value. The Radeon Pro 555X is the newer GPU (2018 vs 2011).
| Feature | Radeon Pro 555X | Radeon HD 6990 |
|---|---|---|
| MSRP | $0-100% | $699 |
| Avg Price (30d) | $1049 | $498-53% |
| Performance per Dollar | 2.9 | 6.1+110% |
| Codename | Polaris 21 | Antilles |
| Release | July 16 2018 | March 8 2011 |
| Ranking | #564 | #583 |
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