GeForce RTX 4070
Mobility Radeon HD 3870 X2
GeForce RTX 4070 vs Mobility Radeon HD 3870 X2 Performance Spectrum
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.
GeForce RTX 4070 vs Mobility Radeon HD 3870 X2 FPS Benchmarks
Predicted gaming performance across popular games. Tested paired with Ryzen 7 9800X3D to isolate GPU performance.
Search any supported game below to compare 1080p FPS for both components.
Path of Exile 2
Counter-Strike 2
League of Legends
GeForce RTX 4070 vs Mobility Radeon HD 3870 X2: Pros, Cons & Final Verdict
See where each GPU makes more sense in practice: raw FPS, VRAM, features, power draw, pricing, and long-term headroom.
GeForce RTX 4070
2023Why buy it
- ✅+5531.6% higher PassMark G3D performance.
- ✅Delivers 4121.3% more G3D Mark for each dollar spent, at 44.9 vs 1.1 G3D/$ ($599 MSRP vs $449 MSRP).
- ✅Access to a newer frame-generation stack with DLSS 3.5 + Frame Generation (2023).
- ✅599900% more VRAM for high-resolution textures and newer games (12 GB vs 2 MB).
- ✅Better long-term bet: Ada Lovelace (2022−2024) on 5nm gives it a newer hardware base for upcoming games.
Trade-offs
- ❌81.8% higher power demand at 200W vs 110W.
- ❌30300% longer card at 304mm vs 1mm.
Mobility Radeon HD 3870 X2
2008Why buy it
- ✅Costs $150 less on MSRP ($449 MSRP vs $599 MSRP).
- ✅Draws 110W instead of 200W, a 90W reduction.
- ✅Measures 1mm instead of 304mm, a 303mm shorter card that is more SFF-friendly.
Trade-offs
- ❌Lower PassMark G3D performance (478 vs 26,919).
- ❌Less VRAM, with 2 MB vs 12 GB for high-resolution textures and newer games.
- ❌No equivalent frame-generation stack like DLSS 3.5 + Frame Generation (2023).
- ❌2008 hardware with 2 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
- ❌Lower G3D Mark per dollar, at 1.1 vs 44.9 G3D/$ ($449 MSRP vs $599 MSRP).
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GeForce RTX 4070 vs Mobility Radeon HD 3870 X2 Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
GeForce RTX 4070
The GeForce RTX 4070 is manufactured by NVIDIA. It was released in April 12 2023. It features the Ada Lovelace architecture. The core clock ranges from 1920 MHz to 2475 MHz. It has 5888 shading units. The thermal design power (TDP) is 200W. Manufactured using 5 nm process technology. It features 46 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 26,919 points. Launch price was $599.
Mobility Radeon HD 3870 X2
The Mobility Radeon HD 3870 X2 is manufactured by AMD. It was released in September 1 2008. It features the TeraScale architecture. The core clock speed is 660 MHz. It has 320 ×2 shading units. The thermal design power (TDP) is 110W. Manufactured using 55 nm process technology. G3D Mark benchmark score: 478 points.
Graphics Performance
In G3D Mark, the GeForce RTX 4070 scores 26,919 versus the Mobility Radeon HD 3870 X2's 478 — the GeForce RTX 4070 leads by 5531.6%. The GeForce RTX 4070 is built on Ada Lovelace while the Mobility Radeon HD 3870 X2 uses TeraScale, both on 5 nm vs 55 nm. Shader units: 5,888 (GeForce RTX 4070) vs 320 (Mobility Radeon HD 3870 X2). Raw compute: 29.15 TFLOPS (GeForce RTX 4070) vs 0.4224 TFLOPS ×2 (Mobility Radeon HD 3870 X2).
| Feature | GeForce RTX 4070 | Mobility Radeon HD 3870 X2 |
|---|---|---|
| G3D Mark Score | 26,919+5532% | 478 |
| Architecture | Ada Lovelace | TeraScale |
| Process Node | 5 nm | 55 nm |
| Shading Units | 5888+1740% | 320 ×2 |
| Compute (TFLOPS) | 29.15 TFLOPS+6801% | 0.4224 TFLOPS ×2 |
| ROPs | 64+300% | 16 ×2 |
| TMUs | 184+1050% | 16 ×2 |
| L2 Cache | 36 MB+14300% | 0.25 MB |
Advanced Features (DLSS/FSR)
The clearest feature edge for the GeForce RTX 4070 is support for DLSS 3.5 + Frame Generation. In games that support it, that can smooth out motion and lift perceived FPS. The Mobility Radeon HD 3870 X2 does not have comparable native support in the same tier.The GeForce RTX 4070 gets NVIDIA DLSS, which still tends to look cleaner in motion. The Mobility Radeon HD 3870 X2 leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.
| Feature | GeForce RTX 4070 | Mobility Radeon HD 3870 X2 |
|---|---|---|
| Upscaling Tech | DLSS 3.5 Super Resolution | FSR Upscaling / FSR 4 |
| Frame Generation | DLSS 3.5 + Frame Generation | Not Supported |
| Ray Reconstruction | Yes (DLSS 3.5) | No |
| Low Latency | NVIDIA Reflex | AMD Anti-Lag |
Video Memory (VRAM)
The GeForce RTX 4070 has 12 GB of VRAM, while the Mobility Radeon HD 3870 X2 carries 2 MB. GeForce RTX 4070 gives you 599900% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is 192-bit on the GeForce RTX 4070 and 64-bit on the Mobility Radeon HD 3870 X2. L2 Cache: 36 MB (GeForce RTX 4070) vs 0.25 MB (Mobility Radeon HD 3870 X2) — the GeForce RTX 4070 has significantly larger on-die cache to reduce VRAM reliance.
| Feature | GeForce RTX 4070 | Mobility Radeon HD 3870 X2 |
|---|---|---|
| VRAM Capacity | 12 GB+599900% | 0.002 GB |
| Memory Type | GDDR6X | GDDR5 |
| Memory Bandwidth | 504 GB/s | Unknown |
| Bus Width | 192-bit+200% | 64-bit |
| L2 Cache | 36 MB+14300% | 0.25 MB |
Display & API Support
DirectX support: 12.2 (GeForce RTX 4070) vs 10.1 (Mobility Radeon HD 3870 X2). Maximum simultaneous displays: 4 vs 0.
| Feature | GeForce RTX 4070 | Mobility Radeon HD 3870 X2 |
|---|---|---|
| DirectX | 12.2+21% | 10.1 |
| Max Displays | 4 | 0 |
Media & Encoding
Hardware encoder: 8th Gen NVENC (2x) (GeForce RTX 4070) vs UVD (Mobility Radeon HD 3870 X2). Decoder: 5th Gen NVDEC vs UVD.
| Feature | GeForce RTX 4070 | Mobility Radeon HD 3870 X2 |
|---|---|---|
| Encoder | 8th Gen NVENC (2x) | UVD |
| Decoder | 5th Gen NVDEC | UVD |
| Codecs | MPEG-2,H.264,HEVC,VP9,AV1 | — |
Power & Dimensions
The GeForce RTX 4070 draws 200W versus the Mobility Radeon HD 3870 X2's 110W — a 58.1% difference. The Mobility Radeon HD 3870 X2 is more power-efficient. Recommended PSU: 650W (GeForce RTX 4070) vs 350W (Mobility Radeon HD 3870 X2). Power connectors: 8-pin vs PCIe-powered. Card length: 304mm vs 1mm, occupying 3 vs 0 slots.
| Feature | GeForce RTX 4070 | Mobility Radeon HD 3870 X2 |
|---|---|---|
| TDP | 200W | 110W-45% |
| Recommended PSU | 650W | 350W-46% |
| Power Connector | 8-pin | PCIe-powered |
| Length | 304mm | 1mm |
| Height | 137mm | — |
| Slots | 3 | 0-100% |
| Temp (Load) | 80°C | — |
| Perf/Watt | 134.6+3030% | 4.3 |
Value Analysis
At launch, the GeForce RTX 4070 came in at $599, while the Mobility Radeon HD 3870 X2 launched at $449. On MSRP, Mobility Radeon HD 3870 X2 was 25% cheaper ($150 less). Performance per dollar on MSRP (G3D Mark / MSRP): 44.9 (GeForce RTX 4070) vs 1.1 (Mobility Radeon HD 3870 X2) — the GeForce RTX 4070 offers 3981.8% better value. The newer card here is GeForce RTX 4070 (2023 vs 2008).
| Feature | GeForce RTX 4070 | Mobility Radeon HD 3870 X2 |
|---|---|---|
| MSRP | $599 | $449-25% |
| Performance per Dollar | 44.9+3982% | 1.1 |
| Codename | AD104 | M88 |
| Release | April 12 2023 | September 1 2008 |
| Ranking | #32 | #919 |
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