AMD Radeon HD 8990 OEM vs AMD Radeon HD 6970
GPU Specs Compare
Graphics Card
Release Date
Apr 2013
Dec 2010
Generation
Sea Islands
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 2.0 x16
Clock Speeds
Base Clock
950 MHz
-
Boost Clock
1000 MHz
-
Memory Clock
1500 MHz
1375 MHz
Memory
Memory Size
3GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
288.0GB/s
176.0GB/s
Render Config
Compute Units
32
24
Shading Units
2048
1536
TMUs
128
96
ROPs
32
32
L1 Cache
16 KB (per CU)
8 KB (per CU)
L2 Cache
768 KB
512 KB
Theoretical Performance
Pixel Rate
32.00 GPixel/s
28.16 GPixel/s
Texture Rate
128.0 GTexel/s
84.48 GTexel/s
FP32 (float)
4.096 TFLOPS
2.703 TFLOPS
FP64 (double)
1024 GFLOPS
675.8 GFLOPS
Graphics Processor
GPU Name
Malta
Cayman
GPU Variant
Malta XT(215-0849026)
Cayman XT(215-0807007)
Architecture
GCN 1.0
TeraScale 3
Foundry
TSMC
TSMC
Process Size
28 nm
40 nm
Transistors
4.313 billion
2.64 billion
Die Size
365 mm²
389 mm²
Board Design
TDP
375W
250W
Suggested PSU
750 W
600 W
Outputs
1x DVI4x mini-DisplayPort 1.2
2x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
2x 8-pin
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
12 (11_1)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
1.2
1.2
Vulkan
1.2
N/A
Shader Model
5.1
5.0