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GPU Comparison
ATI Radeon HD 4870 X2 vs NVIDIA GeForce GT 640 OEM Rebrand
ATI Radeon HD 4870 X2 vs NVIDIA GeForce GT 640 OEM Rebrand
VS
ATI Radeon HD 4870 X2
NVIDIA GeForce GT 640 OEM Rebrand
We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 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
ATI Radeon HD 4870 X2 's Advantages
Larger VRAM bandwidth (115.2GB/s vs 38.40GB/s)
656 additional rendering cores
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Released 3 years and 8 months late
More VRAM (1536GB vs 1024GB)
Lower TDP (75W vs 286W)
Score
Benchmark
FP32 (float)
Radeon HD 4870 X2
+189%
1.2 TFLOPS
GeForce GT 640 OEM Rebrand
0.415 TFLOPS
Radeon HD 4870 X2
VS
GeForce GT 640 OEM Rebrand
Graphics Card
Aug 2008
Release Date
Apr 2012
Radeon R700
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
900 MHz
Memory Clock
800 MHz
Memory
1024MB
Memory Size
1536MB
GDDR5
Memory Type
DDR3
256bit
Memory Bus
192bit
115.2GB/s
Bandwidth
38.40GB/s
Render Config
-
SM Count
3
10
Compute Units
-
800
Shading Units
144
40
TMUs
24
16
ROPs
24
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
64 KB (per SM)
256 KB
L2 Cache
384 KB
Theoretical Performance
12.00 GPixel/s
Pixel Rate
4.320 GPixel/s
30.00 GTexel/s
Texture Rate
17.28 GTexel/s
-
FP16 (half)
-
1200 GFLOPS
FP32 (float)
414.7 GFLOPS
240.0 GFLOPS
FP64 (double)
34.56 GFLOPS
Graphics Processor
R700
GPU Name
GF116
R700 XT (215-0669045)
GPU Variant
GF116-150-A1
TeraScale
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
55 nm
Process Size
40 nm
0.956 billion
Transistors
1.17 billion
256 mm²
Die Size
238 mm²
Board Design
286W
TDP
75W
600 W
Suggested PSU
250 W
2x DVI 1x S-Video
Outputs
2x DVI 1x mini-HDMI 1.3a
1x 6-pin + 1x 8-pin
Power Connectors
None
Graphics Features
10.1 (10_1)
DirectX
12 (11_0)
3.3
OpenGL
4.6
1.1
OpenCL
1.1
N/A
Vulkan
N/A
-
CUDA
2.1
4.1
Shader Model
5.1
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