GPU Comparison
RADEON
AMD Radeon HD 7790
CORE STATE
Bonaire
VRAM
1024 MB
CLOCK SPEED
—
TDP
85 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 2.0
PROCESS
28 nm
LAUNCH DATE
2013
VS
RADEON
Radeon HD 8790M
CORE STATE
Mars
VRAM
2 GB
CLOCK SPEED
900 MHz
TDP
—
BUS WIDTH
128 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_metal
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
HD 7790
HD 8790M
Core Specs
Shading Units
896
384
-57.1%
Shaders
896
384
-57.1%
TMUs
56
24
-57.1%
ROPs
16
8
-50.0%
Compute Units
14
6
-57.1%
Clocks
Base Clock
—
850 MHz
Boost Clock
—
900 MHz
GPU Clock
1000 MHz
—
Memory Clock
1500 MHz
6 Gbps effective
1000 MHz
4 Gbps effective
Memory
Memory Size
1024 MB
2 GB
VRAM (MB)
1,024
2,048
+100.0%
Memory Type
GDDR5
GDDR5
Memory Bus
128 bit
128 bit
Bandwidth
96.00 GB/s
64.00 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
256 KB
256 KB
Performance
Pixel Rate
16.00 GPixel/s
7.200 GPixel/s
Texture Rate
56.00 GTexel/s
21.60 GTexel/s
FP32 (TFLOPS)
1.792 TFLOPS
691.2 GFLOPS
FP64 (TFLOPS)
112.0 GFLOPS (1:16)
43.20 GFLOPS (1:16)
Power
TDP
85 W
—
TDP (W)
85
—
Suggested PSU
250 W
—
Power Connectors
1x 6-pin
None
Architecture
Architecture
GCN 2.0
GCN 1.0
GPU Name
Bonaire
Mars
Generation
Southern Islands
(HD 7700)
Solar System
(HD 8700M)
Process Size
28 nm
28 nm
Transistors
2,080 million
950 million
Die Size
160 mm²
77 mm²
Foundry
TSMC
TSMC
Density
13.0M / mm²
12.3M / mm²
API Support
DirectX
12 (12_0)
12 (11_1)
OpenGL
4.6
4.6
Vulkan
1.2.170
1.2.170
OpenCL
2.1
2.1 (1.2)
Shader Model
6.5
6.5 (5.1)
Physical
Slot Width
Dual-slot
MXM Module
Length
183 mm
7.2 inches
—
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Portable Device Dependent
Bus Interface
PCIe 3.0 x16
MXM-A (3.0)
Other
Launch Price
149 USD
—
Production
End-of-life
End-of-life
Predecessor
Northern Islands
London
Successor
Sea Islands
Gem System