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GPU Comparison
AMD Radeon HD 6990 vs ATI Radeon HD 4750
AMD Radeon HD 6990 vs ATI Radeon HD 4750
VS
AMD Radeon HD 6990
ATI Radeon HD 4750
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 512MB VRAM Radeon HD 4750 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6990 's Advantages
Released 1 years and 6 months late
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (160.0GB/s vs 51.20GB/s)
896 additional rendering cores
ATI Radeon HD 4750 's Advantages
Lower TDP (100W vs 375W)
Score
Benchmark
FP32 (float)
Radeon HD 6990
+173%
2.55 TFLOPS
Radeon HD 4750
0.934 TFLOPS
Radeon HD 6990
VS
Radeon HD 4750
Graphics Card
Mar 2011
Release Date
Sep 2009
Northern Islands
Generation
Radeon R700
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
512MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
160.0GB/s
Bandwidth
51.20GB/s
Render Config
24
Compute Units
8
-
-
-
1536
Shading Units
640
96
TMUs
32
32
ROPs
16
-
-
-
-
-
-
8 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
128 KB
-
-
-
Theoretical Performance
26.56 GPixel/s
Pixel Rate
11.68 GPixel/s
79.68 GTexel/s
Texture Rate
23.36 GTexel/s
-
-
-
2.550 TFLOPS
FP32 (float)
934.4 GFLOPS
637.4 GFLOPS
FP64 (double)
186.9 GFLOPS
Board Design
375W
TDP
100W
750 W
Suggested PSU
300 W
1x DVI 4x mini-DisplayPort 1.2
Outputs
2x DVI 1x S-Video
2x 8-pin
Power Connectors
1x 6-pin
Graphics Processor
Antilles
GPU Name
RV740
Antilles XT (215-0807027)
GPU Variant
RV740 PRO
TeraScale 3
Architecture
TeraScale
TSMC
Foundry
TSMC
40 nm
Process Size
40 nm
2.64 billion
Transistors
0.826 billion
389 mm²
Die Size
137 mm²
Graphics Features
11.2 (11_0)
DirectX
10.1 (10_1)
4.4
OpenGL
3.3
1.2
OpenCL
1.1
N/A
Vulkan
N/A
-
-
-
5.0
Shader Model
4.1
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