GeForce GT 640 Rev. 2 vs Radeon HD 4870
Aggregated performance score
General info
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 681 | 682 |
| Place by popularity | not in top-100 | not in top-100 |
| Value for money | 0.26 | 0.18 |
| Architecture | TeraScale (2005−2013) | Kepler 2.0 (2013−2015) |
| GPU code name | RV770 | GK208 |
| Market segment | Desktop | Desktop |
| Release date | 25 June 2008 (15 years ago) | 29 May 2013 (10 years ago) |
| Launch price (MSRP) | $299 | $89 |
| Current price | $162 (0.5x MSRP) | $230 (2.6x MSRP) |
Value for money
Performance to price ratio. The higher, the better.
ATI HD 4870 has 44% better value for money than GT 640 Rev. 2.
Technical specs
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 800 | 384 |
| Core clock speed | 750 MHz | 1046 MHz |
| Number of transistors | 956 million | 915 million |
| Manufacturing process technology | 55 nm | 28 nm |
| Power consumption (TDP) | 150 Watt | 49 Watt |
| Texture fill rate | 30.00 | 33.47 |
| Floating-point performance | 1,200.0 gflops | 803.3 gflops |
Size and compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 2.0 x16 | PCIe 2.0 x8 |
| Length | 250 mm | 145 mm |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | 2x 6-pin | None |
Memory
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR5 | GDDR5 |
| Maximum RAM amount | 1 GB | 1 GB |
| Memory bus width | 256 Bit | 64 Bit |
| Memory clock speed | 3600 MHz | 5008 MHz |
| Memory bandwidth | 115.2 GB/s | 40.06 GB/s |
Video outputs and ports
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | 2x DVI, 1x S-Video | 1x DVI, 1x HDMI, 1x VGA |
| HDMI | no data | + |
API support
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 10.1 (10_1) | 12 (11_0) |
| Shader Model | 4.1 | 5.1 |
| OpenGL | 3.3 | 4.6 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | N/A | 1.1.126 |
| CUDA | no data | 3.5 |
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Advantages and disadvantages
| Performance score | 3.53 | 3.52 |
| Recency | 25 June 2008 | 29 May 2013 |
| Cost | $299 | $89 |
| Chip lithography | 55 nm | 28 nm |
| Power consumption (TDP) | 150 Watt | 49 Watt |
Given the minimal performance differences, no clear winner can be declared between Radeon HD 4870 and GeForce GT 640 Rev. 2.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
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