Home GPU Comparison AMD Radeon HD 6490 vs AMD Radeon HD 7850

AMD Radeon HD 6490 vs AMD Radeon HD 7850

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6490 and 2GB VRAM Radeon HD 7850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6490 's Advantages
Lower TDP (39W vs 130W)
AMD Radeon HD 7850 's Advantages
Released 8 months late
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (153.6GB/s vs 16.00GB/s)
704 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon HD 6490
0.352 TFLOPS
Radeon HD 7850 +400%
1.761 TFLOPS
VS

Graphics Card

Jul 2011
Release Date
Mar 2012
Northern Islands
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
-
-
-
-
-
500 MHz
Memory Clock
1200 MHz

Memory

1024MB
Memory Size
2GB
DDR2
Memory Type
GDDR5
128bit
Memory Bus
256bit
16.00GB/s
Bandwidth
153.6GB/s

Render Config

4
Compute Units
16
-
-
-
320
Shading Units
1024
16
TMUs
64
8
ROPs
32
-
-
-
-
-
-
8 KB (per CU)
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
512 KB
-
-
-

Theoretical Performance

4.400 GPixel/s
Pixel Rate
27.52 GPixel/s
8.800 GTexel/s
Texture Rate
55.04 GTexel/s
-
-
-
352.0 GFLOPS
FP32 (float)
1.761 TFLOPS
-
FP64 (double)
110.1 GFLOPS

Board Design

39W
TDP
130W
200 W
Suggested PSU
300 W
1x DVI 1x HDMI 1.3a 1x VGA
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
None
Power Connectors
1x 6-pin

Graphics Processor

Redwood
GPU Name
Pitcairn
Redwood LE
GPU Variant
Pitcairn PRO (215-0828062)
TeraScale 2
Architecture
GCN 1.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
0.627 billion
Transistors
2.8 billion
104 mm²
Die Size
212 mm²

Graphics Features

11.2 (11_0)
DirectX
12 (11_1)
4.4
OpenGL
4.6
1.2
OpenCL
1.2
N/A
Vulkan
1.2
-
-
-
5.0
Shader Model
5.1

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