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GPU Comparison
AMD Radeon HD 6870 vs NVIDIA GeForce GT 640 OEM Rebrand
AMD Radeon HD 6870 vs NVIDIA GeForce GT 640 OEM Rebrand
VS
AMD Radeon HD 6870
NVIDIA GeForce GT 640 OEM Rebrand
We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6870 's Advantages
Larger VRAM bandwidth (134.4GB/s vs 38.40GB/s)
976 additional rendering cores
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Released 1 years and 6 months late
More VRAM (1536GB vs 1024GB)
Lower TDP (75W vs 151W)
Score
Benchmark
FP32 (float)
Radeon HD 6870
+385%
2.016 TFLOPS
GeForce GT 640 OEM Rebrand
0.415 TFLOPS
Radeon HD 6870
VS
GeForce GT 640 OEM Rebrand
Graphics Card
Oct 2010
Release Date
Apr 2012
Northern Islands
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1050 MHz
Memory Clock
800 MHz
Memory
1024MB
Memory Size
1536MB
GDDR5
Memory Type
DDR3
256bit
Memory Bus
192bit
134.4GB/s
Bandwidth
38.40GB/s
Render Config
-
SM Count
3
14
Compute Units
-
1120
Shading Units
144
56
TMUs
24
32
ROPs
24
-
Tensor Cores
-
-
RT Cores
-
8 KB (per CU)
L1 Cache
64 KB (per SM)
512 KB
L2 Cache
384 KB
Theoretical Performance
28.80 GPixel/s
Pixel Rate
4.320 GPixel/s
50.40 GTexel/s
Texture Rate
17.28 GTexel/s
-
FP16 (half)
-
2.016 TFLOPS
FP32 (float)
414.7 GFLOPS
-
FP64 (double)
34.56 GFLOPS
Graphics Processor
Barts
GPU Name
GF116
Barts XT (215-0798000)
GPU Variant
GF116-150-A1
TeraScale 2
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
40 nm
Process Size
40 nm
1.7 billion
Transistors
1.17 billion
255 mm²
Die Size
238 mm²
Board Design
151W
TDP
75W
450 W
Suggested PSU
250 W
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
Outputs
2x DVI 1x mini-HDMI 1.3a
2x 6-pin
Power Connectors
None
Graphics Features
11.2 (11_0)
DirectX
12 (11_0)
4.4
OpenGL
4.6
1.2
OpenCL
1.1
N/A
Vulkan
N/A
-
CUDA
2.1
5.0
Shader Model
5.1
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