Radeon HD 6790 vs Radeon R9 295X2
We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6790 and 4GB VRAM Radeon R9 295X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon HD 6790 Advantages
Lower TDP (150W vs 500W)
Radeon R9 295X2 Advantages
Released 3 years late
More VRAM (4GB vs 1024GB)
Larger VRAM bandwidth (320.0GB/s vs 134.4GB/s)
2016 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 6790
1344
Radeon R9 295X2
+326%
5733
Graphics Card
Apr 2011
Release Date
Apr 2014
Northern Islands
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1050 MHz
Memory Clock
1250 MHz
Memory
1024MB
Memory Size
4GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
512bit
134.4GB/s
Bandwidth
320.0GB/s
Render Config
10
Compute Units
44
800
Shading Units
2816
40
TMUs
176
16
ROPs
64
8 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
1024 KB
Theoretical Performance
13.44 GPixel/s
Pixel Rate
65.15 GPixel/s
33.60 GTexel/s
Texture Rate
179.2 GTexel/s
1344 GFLOPS
FP32 (float)
5.733 TFLOPS
-
FP64 (double)
716.7 GFLOPS
Board Design
150W
TDP
500W
450 W
Suggested PSU
900 W
2x DVI
1x HDMI 1.3a
1x DisplayPort 1.1
1x HDMI 1.3a
1x DisplayPort 1.1
Outputs
1x DVI
4x mini-DisplayPort 1.2
4x mini-DisplayPort 1.2
2x 6-pin
Power Connectors
2x 8-pin
Graphics Processor
Barts
GPU Name
Vesuvius
Barts LE
(215-0798002)
(215-0798002)
GPU Variant
Vesuvius XT
(215-0852022)
(215-0852022)
TeraScale 2
Architecture
GCN 2.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
1.7 billion
Transistors
6.2 billion
255 mm²
Die Size
438 mm²
Graphics Features
11.2 (11_0)
DirectX
12 (12_0)
4.4
OpenGL
4.6
1.2
OpenCL
2.0
N/A
Vulkan
1.2
5.0
Shader Model
6.3
