AMD Radeon HD 7990 vs AMD Radeon HD 6750
We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 and 1024MB VRAM Radeon HD 6750 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 7990 's Advantages
Released 2 years and 3 months late
Boost Clock1000MHz
More VRAM (3GB vs 1024GB)
Larger VRAM bandwidth (288.0GB/s vs 73.60GB/s)
1328 additional rendering cores
AMD Radeon HD 6750 's Advantages
Lower TDP (86W vs 375W)
Score
Benchmark
FP32 (float)
Radeon HD 7990
+306%
4.096 TFLOPS
Radeon HD 6750
1.008 TFLOPS
Graphics Card
Apr 2013
Release Date
Jan 2011
Southern Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
950 MHz
Base Clock
-
1000 MHz
Boost Clock
-
1500 MHz
Memory Clock
1150 MHz
Memory
3GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
128bit
288.0GB/s
Bandwidth
73.60GB/s
Render Config
32
Compute Units
9
-
-
-
2048
Shading Units
720
128
TMUs
36
32
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
768 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
32.00 GPixel/s
Pixel Rate
11.20 GPixel/s
128.0 GTexel/s
Texture Rate
25.20 GTexel/s
-
-
-
4.096 TFLOPS
FP32 (float)
1008 GFLOPS
1024 GFLOPS
FP64 (double)
-
Board Design
375W
TDP
86W
750 W
Suggested PSU
250 W
1x DVI
4x mini-DisplayPort 1.2
Outputs
2x DVI
1x HDMI 1.3a
2x mini-DisplayPort 1.1
2x 8-pin
Power Connectors
1x 6-pin
Graphics Processor
Malta
GPU Name
Juniper
Malta XT
(215-0849026)
GPU Variant
Juniper LE
(215-0754009)
GCN 1.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
4.313 billion
Transistors
1.04 billion
365 mm²
Die Size
166 mm²
Graphics Features
12 (11_1)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
1.2
OpenCL
1.2
1.2
Vulkan
N/A
-
-
-
5.1
Shader Model
5.0
