Radeon HD 6990 vs Radeon HD 8470 OEM
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 1024MB VRAM Radeon HD 8470 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon HD 6990 's Advantages
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (160.0GB/s vs 25.60GB/s)
1376 additional rendering cores
Radeon HD 8470 OEM 's Advantages
Released 1 years and 10 months late
Lower TDP (35W vs 375W)
Score
Benchmark
FP32 (float)
Radeon HD 6990
+928%
2550
Radeon HD 8470 OEM
248
Graphics Card
Mar 2011
Release Date
Jan 2013
Northern Islands
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1250 MHz
Memory Clock
800 MHz
Memory
2GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
64bit
160.0GB/s
Bandwidth
25.60GB/s
Render Config
24
Compute Units
2
1536
Shading Units
160
96
TMUs
8
32
ROPs
4
8 KB (per CU)
L1 Cache
8 KB (per CU)
512 KB
L2 Cache
128 KB
Theoretical Performance
26.56 GPixel/s
Pixel Rate
3.100 GPixel/s
79.68 GTexel/s
Texture Rate
6.200 GTexel/s
2.550 TFLOPS
FP32 (float)
248.0 GFLOPS
637.4 GFLOPS
FP64 (double)
-
Board Design
375W
TDP
35W
750 W
Suggested PSU
200 W
1x DVI
4x mini-DisplayPort 1.2
Outputs
1x DVI
1x HDMI 1.3a
2x 8-pin
Power Connectors
None
Graphics Processor
Antilles
GPU Name
Caicos
Antilles XT
(215-0807027)
GPU Variant
Caicos XT
(215-0804070)
TeraScale 3
Architecture
TeraScale 2
TSMC
Foundry
TSMC
40 nm
Process Size
40 nm
2.64 billion
Transistors
0.37 billion
389 mm²
Die Size
67 mm²
Graphics Features
11.2 (11_0)
DirectX
11.2 (11_0)
4.4
OpenGL
4.4
1.2
OpenCL
1.2
N/A
Vulkan
N/A
5.0
Shader Model
5.0
