GeForce 8400M GT vs GT 640 OEM
Aggregate performance score
We've compared GeForce GT 640 OEM with GeForce 8400M GT, including specs and performance data.
640 OEM outperforms 8400M by a whopping 869% based on our aggregate benchmark results.
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1002 | 1476 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 2.38 | 0.88 |
| Architecture | Kepler (2012−2018) | Tesla (2006−2010) |
| GPU code name | GK107 | G86 |
| Market segment | Desktop | Laptop |
| Release date | 24 April 2012 (13 years ago) | 9 May 2007 (18 years ago) |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 384 | 16 |
| Core clock speed | 797 MHz | 450 MHz |
| Number of transistors | 1,270 million | 210 million |
| Manufacturing process technology | 28 nm | 80 nm |
| Power consumption (TDP) | 50 Watt | 14 Watt |
| Texture fill rate | 25.50 | 3.600 |
| Floating-point processing power | 0.6121 TFLOPS | 0.0288 TFLOPS |
| ROPs | 16 | 4 |
| TMUs | 32 | 8 |
| L1 Cache | 32 KB | no data |
| L2 Cache | 256 KB | 32 KB |
Form factor & 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 3.0 x16 | PCIe 1.0 x16 |
| Length | 145 mm | no data |
| Width | 1-slot | no data |
| Supplementary power connectors | None | no data |
VRAM capacity and type
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 | DDR3 | GDDR3 |
| Maximum RAM amount | 2 GB | 512 MB |
| Memory bus width | 128 Bit | 128 Bit |
| Memory clock speed | 891 MHz | 600 MHz |
| Memory bandwidth | 28.51 GB/s | 19.2 GB/s |
| Shared memory | no data | - |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | 1x DVI, 1x HDMI, 1x DisplayPort | No outputs |
| HDMI | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 11.1 (10_0) |
| Shader Model | 5.1 | 4.0 |
| OpenGL | 4.6 | 3.3 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | 1.1.126 | N/A |
| CUDA | 3.0 | 1.1 |
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
FPS performance in popular games
Full HD
Low
| Cyberpunk 2077 | 1−2
+0%
|
1−2
+0%
|
| Hogwarts Legacy | 5−6
+0%
|
5−6
+0%
|
Full HD
Medium
| Cyberpunk 2077 | 1−2
+0%
|
1−2
+0%
|
| Forza Horizon 4 | 3−4
+0%
|
3−4
+0%
|
| Hogwarts Legacy | 5−6
+0%
|
5−6
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 7−8
+0%
|
7−8
+0%
|
| Valorant | 24−27
+0%
|
24−27
+0%
|
Full HD
High
| Counter-Strike: Global Offensive | 10−12
+0%
|
10−12
+0%
|
| Cyberpunk 2077 | 1−2
+0%
|
1−2
+0%
|
| Dota 2 | 8−9
+0%
|
8−9
+0%
|
| Forza Horizon 4 | 3−4
+0%
|
3−4
+0%
|
| Hogwarts Legacy | 5−6
+0%
|
5−6
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 7−8
+0%
|
7−8
+0%
|
| The Witcher 3: Wild Hunt | 5−6
+0%
|
5−6
+0%
|
| Valorant | 24−27
+0%
|
24−27
+0%
|
Full HD
Ultra
| Cyberpunk 2077 | 1−2
+0%
|
1−2
+0%
|
| Dota 2 | 8−9
+0%
|
8−9
+0%
|
| Forza Horizon 4 | 3−4
+0%
|
3−4
+0%
|
| Hogwarts Legacy | 5−6
+0%
|
5−6
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 7−8
+0%
|
7−8
+0%
|
| The Witcher 3: Wild Hunt | 5−6
+0%
|
5−6
+0%
|
| Valorant | 24−27
+0%
|
24−27
+0%
|
1440p
High
| Counter-Strike 2 | 2−3
+0%
|
2−3
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 2−3
+0%
|
2−3
+0%
|
1440p
Ultra
| Forza Horizon 4 | 1−2
+0%
|
1−2
+0%
|
| The Witcher 3: Wild Hunt | 1−2
+0%
|
1−2
+0%
|
4K
High
| Grand Theft Auto V | 14−16
+0%
|
14−16
+0%
|
| Valorant | 1−2
+0%
|
1−2
+0%
|
4K
Ultra
| PLAYERUNKNOWN'S BATTLEGROUNDS | 1−2
+0%
|
1−2
+0%
|
4K
Epic
| Fortnite | 2−3
+0%
|
2−3
+0%
|
All in all, in popular games:
- there's a draw in 30 tests (100%)
Pros & cons summary
| Performance score | 1.55 | 0.16 |
| Recency | 24 April 2012 | 9 May 2007 |
| Maximum RAM amount | 2 GB | 512 MB |
| Chip lithography | 28 nm | 80 nm |
| Power consumption (TDP) | 50 Watt | 14 Watt |
GT 640 OEM has a 868.8% higher aggregate performance score, an age advantage of 4 years, a 300% higher maximum VRAM amount, and a 185.7% more advanced lithography process.
8400M GT, on the other hand, has 257.1% lower power consumption.
The GeForce GT 640 OEM is our recommended choice as it beats the GeForce 8400M GT in performance tests.
Be aware that GeForce GT 640 OEM is a desktop graphics card while GeForce 8400M GT is a notebook one.
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