Home GPU Comparison ATI Radeon HD 4870 X2 vs NVIDIA GeForce GT 640 Rev. 2

ATI Radeon HD 4870 X2 vs NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 1024MB VRAM GeForce GT 640 Rev. 2 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 40.06GB/s)
416 additional rendering cores
NVIDIA GeForce GT 640 Rev. 2 's Advantages
Released 4 years and 9 months late
Lower TDP (49W vs 286W)

Score

Benchmark

FP32 (float)
Radeon HD 4870 X2 +49%
1.2 TFLOPS
GeForce GT 640 Rev. 2
0.803 TFLOPS
VS

Graphics Card

Aug 2008
Release Date
May 2013
Radeon R700
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x8

Clock Speeds

-
Base Clock
-
-
Boost Clock
-
900 MHz
Memory Clock
1252 MHz

Memory

1024MB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
64bit
115.2GB/s
Bandwidth
40.06GB/s

Render Config

-
SM Count
-
10
Compute Units
-
800
Shading Units
384
40
TMUs
32
16
ROPs
8
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per SMX)
256 KB
L2 Cache
512 KB

Theoretical Performance

12.00 GPixel/s
Pixel Rate
8.368 GPixel/s
30.00 GTexel/s
Texture Rate
33.47 GTexel/s
-
FP16 (half)
-
1200 GFLOPS
FP32 (float)
803.3 GFLOPS
240.0 GFLOPS
FP64 (double)
33.47 GFLOPS

Graphics Processor

R700
GPU Name
GK208
R700 XT (215-0669045)
GPU Variant
GK208-400-A1
TeraScale
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
55 nm
Process Size
28 nm
0.956 billion
Transistors
1.02 billion
256 mm²
Die Size
87 mm²

Board Design

286W
TDP
49W
600 W
Suggested PSU
200 W
2x DVI 1x S-Video
Outputs
1x DVI 1x HDMI 1.4a 1x VGA
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
3.0
N/A
Vulkan
1.1
-
CUDA
3.5
4.1
Shader Model
5.1

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