GeForce GT 645 vs Radeon R9 M385X
GeForce GT 645
Popular choices:
Radeon R9 M385X
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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. The GeForce GT 645 is positioned at rank 242 and the Radeon R9 M385X is on rank 429, so the GeForce GT 645 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar GeForce GT 645
Performance Per Dollar Radeon R9 M385X
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The GeForce GT 645 is the superior choice for raw performance. It leads with a 0.6% higher G3D Mark score and 300% more VRAM (2 GB vs 512 MB). This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon R9 M385X.
| Insight | GeForce GT 645 | Radeon R9 M385X |
|---|---|---|
| Performance | ✅Leading raw performance (+0.6%) | ❌Lower raw frame rates (-0.6%) |
| Longevity | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) | 🛑Obsolete Architecture (2015 / GCN 2.0 (2013−2017)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ✅ More VRAM (+300%) | ❌ Less VRAM capacity |
| Efficiency | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| Case Fit | 📏 Compact / SFF Friendly | — |
💎 Value Proposition
The GeForce GT 645 offers a compelling cost-to-performance ratio. While both GPUs are considered legacy components by modern standards, the GeForce GT 645 holds the technical lead. Priced at $15 (vs $300), it costs 95% less, resulting in a 1912% higher cost efficiency score.
| Insight | GeForce GT 645 | Radeon R9 M385X |
|---|---|---|
| Cost Efficiency | ✅Better overall value (+1912%) | ❌Lower cost efficiency |
| Upfront Cost | ✅More affordable ($15) | ⚠️Higher upfront cost ($300) |
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 GeForce GT 645 and Radeon R9 M385X
GeForce GT 645
The GeForce GT 645 is manufactured by NVIDIA. It was released in October 1 2012. It features the Kepler architecture. The core clock speed is Up to 710 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 2,006 points.
Radeon R9 M385X
The Radeon R9 M385X is manufactured by AMD. It was released in May 5 2015. It features the GCN 2.0 architecture. The core clock ranges from 1000 MHz to 1100 MHz. It has 896 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,994 points.
Graphics Performance
The GeForce GT 645 scores 2,006 and the Radeon R9 M385X reaches 1,994 in the G3D Mark benchmark — just a 0.6% difference, making them near-identical in rasterization performance. The GeForce GT 645 is built on Kepler while the Radeon R9 M385X uses GCN 2.0, both on a 28 nm process. Shader units: 384 (GeForce GT 645) vs 896 (Radeon R9 M385X). Raw compute: 0.5445 TFLOPS (GeForce GT 645) vs 1.971 TFLOPS (Radeon R9 M385X).
| Feature | GeForce GT 645 | Radeon R9 M385X |
|---|---|---|
| G3D Mark Score | 2,006 | 1,994 |
| Architecture | Kepler | GCN 2.0 |
| Process Node | 28 nm | 28 nm |
| Shading Units | 384 | 896+133% |
| Compute (TFLOPS) | 0.5445 TFLOPS | 1.971 TFLOPS+262% |
| ROPs | 16 | 16 |
| TMUs | 32 | 56+75% |
| L1 Cache | 32 KB | 224 KB+600% |
| L2 Cache | 256 KB | 256 KB |
Advanced Features (DLSS/FSR)
| Feature | GeForce GT 645 | Radeon R9 M385X |
|---|---|---|
| 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 GeForce GT 645 comes with 2 GB of VRAM, while the Radeon R9 M385X has 512 MB. The GeForce GT 645 offers 300% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs 128-bit.
| Feature | GeForce GT 645 | Radeon R9 M385X |
|---|---|---|
| VRAM Capacity | 2 GB+300% | 0.5 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 128-bit | 128-bit |
| L2 Cache | 256 KB | 256 KB |
Display & API Support
DirectX support: 12 (11_0) (GeForce GT 645) vs 12 (12_0) (Radeon R9 M385X). Vulkan: 1.2 vs 1.2. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 3 vs 4.
| Feature | GeForce GT 645 | Radeon R9 M385X |
|---|---|---|
| DirectX | 12 (11_0) | 12 (12_0) |
| Vulkan | 1.2 | 1.2 |
| OpenGL | 4.6 | 4.6 |
| Max Displays | 3 | 4+33% |
Media & Encoding
Hardware encoder: NVENC (1st Gen) (GeForce GT 645) vs VCE 2.0 (Radeon R9 M385X). Decoder: NVDEC (1st Gen) vs UVD 4.2. Supported codecs: H.264,MPEG-2,VC-1 (GeForce GT 645) vs H.264,MPEG-4,VC-1,MPEG-2 (Radeon R9 M385X).
| Feature | GeForce GT 645 | Radeon R9 M385X |
|---|---|---|
| Encoder | NVENC (1st Gen) | VCE 2.0 |
| Decoder | NVDEC (1st Gen) | UVD 4.2 |
| Codecs | H.264,MPEG-2,VC-1 | H.264,MPEG-4,VC-1,MPEG-2 |
Power & Dimensions
The GeForce GT 645 draws 32W versus the Radeon R9 M385X's 75W — a 80.4% difference. The GeForce GT 645 is more power-efficient. Recommended PSU: 350W (GeForce GT 645) vs 350W (Radeon R9 M385X). Power connectors: PCIe-powered vs Mobile. Card length: 145mm vs 0mm, occupying 1 vs 0 slots. Typical load temperature: 80 vs 85.
| Feature | GeForce GT 645 | Radeon R9 M385X |
|---|---|---|
| TDP | 32W-57% | 75W |
| Recommended PSU | 350W | 350W |
| Power Connector | PCIe-powered | Mobile |
| Length | 145mm | 0mm |
| Height | 111mm | 0mm |
| Slots | 1 | 0-100% |
| Temp (Load) | 80-6% | 85 |
| Perf/Watt | 62.7+136% | 26.6 |
Value Analysis
The GeForce GT 645 launched at $99 MSRP and currently averages $15, while the Radeon R9 M385X launched at $300 and now averages $300. The GeForce GT 645 costs 95% less ($285 savings) at current market prices. Performance per dollar (G3D Mark / price): 133.7 (GeForce GT 645) vs 6.6 (Radeon R9 M385X) — the GeForce GT 645 offers 1925.8% better value. The Radeon R9 M385X is the newer GPU (2015 vs 2012).
| Feature | GeForce GT 645 | Radeon R9 M385X |
|---|---|---|
| MSRP | $99-67% | $300 |
| Avg Price (30d) | $15-95% | $300 |
| Performance per Dollar | 133.7+1926% | 6.6 |
| Codename | GK107 | Strato |
| Release | October 1 2012 | May 5 2015 |
| Ranking | #903 | #681 |
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