
GRID P4-8Q vs Radeon HD 8990

GRID P4-8Q
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Radeon HD 8990
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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. The GRID P4-8Q is positioned at rank #261 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. 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 GRID P4-8Q
Performance Per Dollar
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The GRID P4-8Q is the superior choice for raw performance. It leads with a 1.3% higher G3D Mark score and 33.3% more VRAM (4 GB vs 3 GB). This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon HD 8990.
| Insight | GRID P4-8Q | Radeon HD 8990 |
|---|---|---|
| Performance | ✅Leading raw performance (+1.3%) | ❌Lower raw frame rates (-1.3%) |
| Longevity | 🛑Obsolete Architecture (2015 / Maxwell 2.0 (2014−2019)) | 🛑Obsolete Architecture (2013 / GCN 1.0 (2012−2020)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ✅ More VRAM (+33.3%) | ❌ Less VRAM capacity |
| Efficiency | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| Case Fit | — | — |
💎 Value Proposition
The GRID P4-8Q offers a compelling cost-to-performance ratio. While both GPUs are considered legacy components by modern standards, the GRID P4-8Q holds the technical lead. Priced at $200 (vs $999), it costs 80% less, resulting in a 406.1% higher cost efficiency score.
| Insight | GRID P4-8Q | Radeon HD 8990 |
|---|---|---|
| Cost Efficiency | ✅Better overall value (+406.1%) | ❌Lower cost efficiency |
| Upfront Cost | ✅More affordable ($200) | ⚠️Higher upfront cost ($999) |
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 GRID P4-8Q and Radeon HD 8990

GRID P4-8Q
The GRID P4-8Q is manufactured by NVIDIA. It was released in August 30 2015. It features the Maxwell 2.0 architecture. The core clock speed is 722 MHz. It has 1536 shading units. The thermal design power (TDP) is 100W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 5,283 points.

Radeon HD 8990
The Radeon HD 8990 is manufactured by AMD. It was released in April 24 2013. It features the GCN 1.0 architecture. The core clock ranges from 950 MHz to 1000 MHz. It has 2048 ×2 shading units. The thermal design power (TDP) is 375W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 5,214 points. Launch price was $999.
Graphics Performance
The GRID P4-8Q scores 5,283 and the Radeon HD 8990 reaches 5,214 in the G3D Mark benchmark — just a 1.3% difference, making them near-identical in rasterization performance. The GRID P4-8Q is built on Maxwell 2.0 while the Radeon HD 8990 uses GCN 1.0, both on a 28 nm process. Shader units: 1,536 (GRID P4-8Q) vs 2,048 (Radeon HD 8990). Raw compute: 2.218 TFLOPS (GRID P4-8Q) vs 4.096 TFLOPS ×2 (Radeon HD 8990).
| Feature | GRID P4-8Q | Radeon HD 8990 |
|---|---|---|
| G3D Mark Score | 5,283+1% | 5,214 |
| Architecture | Maxwell 2.0 | GCN 1.0 |
| Process Node | 28 nm | 28 nm |
| Shading Units | 1536 | 2048 ×2+33% |
| Compute (TFLOPS) | 2.218 TFLOPS | 4.096 TFLOPS ×2+85% |
| ROPs | 64+100% | 32 ×2 |
| TMUs | 96 | 128 ×2+33% |
| L1 Cache | 576 KB+13% | 512 KB |
| L2 Cache | 2 MB+167% | 0.75 MB |
Advanced Features (DLSS/FSR)
| Feature | GRID P4-8Q | Radeon HD 8990 |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 1.0 (Software) |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | Standard | AMD Anti-Lag |
Video Memory (VRAM)
The GRID P4-8Q comes with 4 GB of VRAM, while the Radeon HD 8990 has 3 GB. The GRID P4-8Q offers 33.3% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs 384-bit x2. L2 Cache: 2 MB (GRID P4-8Q) vs 0.75 MB (Radeon HD 8990) — the GRID P4-8Q has significantly larger on-die cache to reduce VRAM reliance.
| Feature | GRID P4-8Q | Radeon HD 8990 |
|---|---|---|
| VRAM Capacity | 4 GB+33% | 3 GB |
| Memory Type | GDDR6 | GDDR5 |
| Bus Width | 128-bit | 384-bit x2+200% |
| L2 Cache | 2 MB+167% | 0.75 MB |
Power & Dimensions
The GRID P4-8Q draws 100W versus the Radeon HD 8990's 375W — a 115.8% difference. The GRID P4-8Q is more power-efficient. Recommended PSU: 350W (GRID P4-8Q) vs 750W (Radeon HD 8990). Power connectors: PCIe-powered vs 2x 8-pin.
| Feature | GRID P4-8Q | Radeon HD 8990 |
|---|---|---|
| TDP | 100W-73% | 375W |
| Recommended PSU | 350W-53% | 750W |
| Power Connector | PCIe-powered | 2x 8-pin |
| Perf/Watt | 52.8+280% | 13.9 |
Value Analysis
The GRID P4-8Q launched at $2000 MSRP and currently averages $200, while the Radeon HD 8990 launched at $999 and now averages $999. The GRID P4-8Q costs 80% less ($799 savings) at current market prices. Performance per dollar (G3D Mark / price): 26.4 (GRID P4-8Q) vs 5.2 (Radeon HD 8990) — the GRID P4-8Q offers 407.7% better value. The GRID P4-8Q is the newer GPU (2015 vs 2013).
| Feature | GRID P4-8Q | Radeon HD 8990 |
|---|---|---|
| MSRP | $2000 | $999-50% |
| Avg Price (30d) | $200-80% | $999 |
| Performance per Dollar | 26.4+408% | 5.2 |
| Codename | GM204 | Malta |
| Release | August 30 2015 | April 24 2013 |
| Ranking | #535 | #412 |
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