AMD Radeon HD 7990 vs AMD Radeon HD 7790
GPU Specs Compare
Graphics Card
Release Date
Apr 2013
Mar 2013
Generation
Southern Islands
Southern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
950 MHz
-
Boost Clock
1000 MHz
-
Memory Clock
1500 MHz
1500 MHz
Memory
Memory Size
3GB
1024MB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
128bit
Bandwidth
288.0GB/s
96.00GB/s
Render Config
Compute Units
32
14
Shading Units
2048
896
TMUs
128
56
ROPs
32
16
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
256 KB
Theoretical Performance
Pixel Rate
32.00 GPixel/s
16.00 GPixel/s
Texture Rate
128.0 GTexel/s
56.00 GTexel/s
FP32 (float)
4.096 TFLOPS
1.792 TFLOPS
FP64 (double)
1024 GFLOPS
112.0 GFLOPS
Graphics Processor
GPU Name
Malta
Bonaire
GPU Variant
Malta XT(215-0849026)
Bonaire XT(215-0839039)
Architecture
GCN 1.0
GCN 2.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
4.313 billion
2.08 billion
Die Size
365 mm²
160 mm²
Board Design
TDP
375W
85W
Suggested PSU
750 W
250 W
Outputs
1x DVI4x mini-DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
2x 8-pin
1x 6-pin
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
1.2
2.0
Vulkan
1.2
1.2
Shader Model
5.1
6.3
📊 Benchmark
3DMark Time Spy
-
1,307
3DMark Time Spy Extreme
-
409