
FirePro V7800 vs GeForce GT 645

FirePro V7800
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GeForce GT 645
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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 FirePro V7800 is positioned at rank 257 and the GeForce GT 645 is on rank 242, 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 FirePro V7800
Performance Per Dollar GeForce GT 645
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The FirePro V7800 is the superior choice for raw performance. It leads with a 1.1% higher G3D Mark score and 100% more VRAM (4 GB vs 2 GB). This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the GeForce GT 645.
| Insight | FirePro V7800 | GeForce GT 645 |
|---|---|---|
| Performance | ✅Leading raw performance (+1.1%) | ❌Lower raw frame rates (-1.1%) |
| Longevity | 🛑Obsolete Architecture (2011 / TeraScale 3 (2010−2013)) | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ✅ More VRAM (+100%) | ❌ Less VRAM capacity |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| Case Fit | Standard Size (254mm) | 📏 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 $96), it costs 84% less, resulting in a 533.1% higher cost efficiency score.
| Insight | FirePro V7800 | GeForce GT 645 |
|---|---|---|
| Cost Efficiency | ❌Lower cost efficiency | ✅Better overall value (+533.1%) |
| Upfront Cost | ⚠️Higher upfront cost ($96) | ✅More affordable ($15) |
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 FirePro V7800 and GeForce GT 645

FirePro V7800
The FirePro V7800 is manufactured by AMD. It was released in May 24 2011. It features the TeraScale 3 architecture. The core clock speed is 725 MHz. It has 1280 shading units. The thermal design power (TDP) is 150W. Manufactured using 40 nm process technology. G3D Mark benchmark score: 2,028 points.

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.
Graphics Performance
The FirePro V7800 scores 2,028 and the GeForce GT 645 reaches 2,006 in the G3D Mark benchmark — just a 1.1% difference, making them near-identical in rasterization performance. The FirePro V7800 is built on TeraScale 3 while the GeForce GT 645 uses Kepler, both on 40 nm vs 28 nm. Shader units: 1,280 (FirePro V7800) vs 384 (GeForce GT 645). Raw compute: 1.856 TFLOPS (FirePro V7800) vs 0.5445 TFLOPS (GeForce GT 645).
| Feature | FirePro V7800 | GeForce GT 645 |
|---|---|---|
| G3D Mark Score | 2,028+1% | 2,006 |
| Architecture | TeraScale 3 | Kepler |
| Process Node | 40 nm | 28 nm |
| Shading Units | 1280+233% | 384 |
| Compute (TFLOPS) | 1.856 TFLOPS+241% | 0.5445 TFLOPS |
| ROPs | 32+100% | 16 |
| TMUs | 80+150% | 32 |
| L1 Cache | 320 KB+900% | 32 KB |
| L2 Cache | 512 KB+100% | 256 KB |
Advanced Features (DLSS/FSR)
| Feature | FirePro V7800 | GeForce GT 645 |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 1.0 (Software) |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | Standard | Standard |
Video Memory (VRAM)
The FirePro V7800 comes with 4 GB of VRAM, while the GeForce GT 645 has 2 GB. The FirePro V7800 offers 100% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 64-bit vs 128-bit. L2 Cache: 512 KB (FirePro V7800) vs 256 KB (GeForce GT 645) — the FirePro V7800 has significantly larger on-die cache to reduce VRAM reliance.
| Feature | FirePro V7800 | GeForce GT 645 |
|---|---|---|
| VRAM Capacity | 4 GB+100% | 2 GB |
| Memory Type | GDDR5 | GDDR5 |
| Bus Width | 64-bit | 128-bit+100% |
| L2 Cache | 512 KB+100% | 256 KB |
Display & API Support
DirectX support: 11.2 (FirePro V7800) vs 12 (11_0) (GeForce GT 645). Vulkan: None vs 1.2. OpenGL: 4.4 vs 4.6. Maximum simultaneous displays: 3 vs 3.
| Feature | FirePro V7800 | GeForce GT 645 |
|---|---|---|
| DirectX | 11.2 | 12 (11_0)+7% |
| Vulkan | None | 1.2 |
| OpenGL | 4.4 | 4.6+5% |
| Max Displays | 3 | 3 |
Media & Encoding
Hardware encoder: None (FirePro V7800) vs NVENC (1st Gen) (GeForce GT 645). Decoder: UVD 2.3 vs NVDEC (1st Gen). Supported codecs: H.264,VC-1,MPEG-2 (FirePro V7800) vs H.264,MPEG-2,VC-1 (GeForce GT 645).
| Feature | FirePro V7800 | GeForce GT 645 |
|---|---|---|
| Encoder | None | NVENC (1st Gen) |
| Decoder | UVD 2.3 | NVDEC (1st Gen) |
| Codecs | H.264,VC-1,MPEG-2 | H.264,MPEG-2,VC-1 |
Power & Dimensions
The FirePro V7800 draws 150W versus the GeForce GT 645's 32W — a 129.7% difference. The GeForce GT 645 is more power-efficient. Recommended PSU: 350W (FirePro V7800) vs 350W (GeForce GT 645). Power connectors: PCIe-powered vs PCIe-powered. Card length: 254mm vs 145mm, occupying 1 vs 1 slots. Typical load temperature: 85°C vs 80.
| Feature | FirePro V7800 | GeForce GT 645 |
|---|---|---|
| TDP | 150W | 32W-79% |
| Recommended PSU | 350W | 350W |
| Power Connector | PCIe-powered | PCIe-powered |
| Length | 254mm | 145mm |
| Height | 111mm | 111mm |
| Slots | 1 | 1 |
| Temp (Load) | 85°C | 80-6% |
| Perf/Watt | 13.5 | 62.7+364% |
Value Analysis
The FirePro V7800 launched at $759 MSRP and currently averages $96, while the GeForce GT 645 launched at $99 and now averages $15. The GeForce GT 645 costs 84.4% less ($81 savings) at current market prices. Performance per dollar (G3D Mark / price): 21.1 (FirePro V7800) vs 133.7 (GeForce GT 645) — the GeForce GT 645 offers 533.6% better value. The GeForce GT 645 is the newer GPU (2012 vs 2011).
| Feature | FirePro V7800 | GeForce GT 645 |
|---|---|---|
| MSRP | $759 | $99-87% |
| Avg Price (30d) | $96 | $15-84% |
| Performance per Dollar | 21.1 | 133.7+534% |
| Codename | Cayman | GK107 |
| Release | May 24 2011 | October 1 2012 |
| Ranking | #656 | #903 |
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