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GPU Comparison
ATI Radeon HD 4850 X2 vs AMD Radeon HD 6990
ATI Radeon HD 4850 X2 vs AMD Radeon HD 6990
VS
ATI Radeon HD 4850 X2
AMD Radeon HD 6990
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4850 X2 and 2GB VRAM Radeon HD 6990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
ATI Radeon HD 4850 X2 's Advantages
Lower TDP (250W vs 375W)
AMD Radeon HD 6990 's Advantages
Released 2 years and 4 months late
Larger VRAM bandwidth (160.0GB/s vs 63.68GB/s)
736 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 4850 X2
1 TFLOPS
Radeon HD 6990
+155%
2.55 TFLOPS
Radeon HD 4850 X2
VS
Radeon HD 6990
Graphics Card
Nov 2008
Release Date
Mar 2011
Radeon R700
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
995 MHz
Memory Clock
1250 MHz
Memory
512MB
Memory Size
2GB
GDDR3
Memory Type
GDDR5
256bit
Memory Bus
256bit
63.68GB/s
Bandwidth
160.0GB/s
Render Config
-
SM Count
-
10
Compute Units
24
800
Shading Units
1536
40
TMUs
96
16
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
256 KB
L2 Cache
512 KB
Theoretical Performance
10.00 GPixel/s
Pixel Rate
26.56 GPixel/s
25.00 GTexel/s
Texture Rate
79.68 GTexel/s
-
FP16 (half)
-
1000 GFLOPS
FP32 (float)
2.550 TFLOPS
200.0 GFLOPS
FP64 (double)
637.4 GFLOPS
Graphics Processor
R700
GPU Name
Antilles
R700 PRO (215-0669065)
GPU Variant
Antilles XT (215-0807027)
TeraScale
Architecture
TeraScale 3
TSMC
Foundry
TSMC
55 nm
Process Size
40 nm
0.956 billion
Transistors
2.64 billion
256 mm²
Die Size
389 mm²
Board Design
250W
TDP
375W
600 W
Suggested PSU
750 W
4x DVI 1x S-Video
Outputs
1x DVI 4x mini-DisplayPort 1.2
1x 6-pin + 1x 8-pin
Power Connectors
2x 8-pin
Graphics Features
10.1 (10_1)
DirectX
11.2 (11_0)
3.3
OpenGL
4.4
1.1
OpenCL
1.2
N/A
Vulkan
N/A
-
CUDA
-
4.1
Shader Model
5.0
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