Home GPU Comparison ATI Radeon HD 4890 vs NVIDIA GeForce GT 640 OEM

ATI Radeon HD 4890 vs NVIDIA GeForce GT 640 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4890 and 2GB VRAM GeForce GT 640 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4890 's Advantages
Larger VRAM bandwidth (124.8GB/s vs 28.51GB/s)
416 additional rendering cores
NVIDIA GeForce GT 640 OEM 's Advantages
Released 3 years late
More VRAM (2GB vs 1024GB)
Lower TDP (50W vs 190W)

Score

Benchmark

FP32 (float)
Radeon HD 4890 +122%
1.36 TFLOPS
GeForce GT 640 OEM
0.612 TFLOPS
VS

Graphics Card

Apr 2009
Release Date
Apr 2012
Radeon R700
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
-
-
-
-
-
975 MHz
Memory Clock
891 MHz

Memory

1024MB
Memory Size
2GB
GDDR5
Memory Type
DDR3
256bit
Memory Bus
128bit
124.8GB/s
Bandwidth
28.51GB/s

Render Config

10
Compute Units
-
-
-
-
800
Shading Units
384
40
TMUs
32
16
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per SMX)
256 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

13.60 GPixel/s
Pixel Rate
6.376 GPixel/s
34.00 GTexel/s
Texture Rate
25.50 GTexel/s
-
-
-
1360 GFLOPS
FP32 (float)
612.1 GFLOPS
272.0 GFLOPS
FP64 (double)
25.50 GFLOPS

Board Design

190W
TDP
50W
450 W
Suggested PSU
250 W
2x DVI 1x S-Video
Outputs
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
2x 6-pin
Power Connectors
None

Graphics Processor

RV790
GPU Name
GK107
RV790 XT (215-0758016)
GPU Variant
GK107-320-A2
TeraScale
Architecture
Kepler
TSMC
Foundry
TSMC
55 nm
Process Size
28 nm
0.959 billion
Transistors
1.27 billion
282 mm²
Die Size
118 mm²

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
3.0
4.1
Shader Model
5.1

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