NVIDIA · Kepler (derived from codename prefix) · 2013
GeForce GT 640 Rev. 2
GeForce GT 640 Rev. 2: 1 GB GDDR5, 49 W, 384 CUDA cores. Launched May 29, 2013 at $89.
- Memory
- 1 GB
- Power
- 49 W
- Bus width
- 64 bit
Memory1 GB
34 of 94 in GeForce GT
Power49 W
39 of 91 by higher draw in GeForce GT
CUDA cores384
1 of 104 in GeForce GT
Launch price$89
4 of 23 in GeForce GT
Current market
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Specifications
Memory
- Capacity
- 1 GB
- Memory type
- GDDR5
- Bus width
- 64 bit
- Memory clock
- 1,252 MHz
- Bandwidth
- 40.06 GB/s
Compute
- CUDA cores
- 384
- SM count
- 2
- TMUs
- 32
- ROPs
- 8
- FP32
- 803.328 GFLOPS
- FP64
- 33.472 GFLOPS
- Pixel fill rate
- 16.74 GP/s
- Texture fill rate
- 33.47 GT/s
Clocks
- Boost clock
- 1,046 MHz
Board
- TDP
- 49 W
- Bus interface
- PCIe 2.0 x8
- External power required
- No
- Form factor
- desktop
- Launch MSRP
- 89 USD
Physical
- Architecture
- Kepler (derived from codename prefix)
- Codename
- GK208-400-A1
- Process
- 28 nm
- Transistors
- 1.02 billion
- Die size
- 87 mm²
- Series
- GeForce GT
- Launch date
- May 29, 2013
Not recorded by the source: generation and base clock.
Die figure
Silicon, made visible
Die area is drawn against the largest recorded die in the catalog. Shader dots use a labeled, card-specific ratio so both early and modern GPUs remain legible.
Catalog context
Within its series, the GeForce GT 640 Rev. 2 ranks 5th of 54 for FP32 throughput and 34th of 94 for memory capacity. Its 49 W TDP is within the 75 W PCIe slot-power ceiling.
Source: Wikipedia, revision 1369488585 · catalog loaded 2026-08-16