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GPU Comparison
AMD Radeon R9 390 vs ATI Radeon HD 2900 GT
AMD Radeon R9 390 vs ATI Radeon HD 2900 GT
VS
AMD Radeon R9 390
ATI Radeon HD 2900 GT
We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 and 256MB VRAM Radeon HD 2900 GT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 390 's Advantages
Released 7 years and 7 months late
More VRAM (8GB vs 256GB)
Larger VRAM bandwidth (384.0GB/s vs 51.20GB/s)
2320 additional rendering cores
ATI Radeon HD 2900 GT 's Advantages
Lower TDP (150W vs 275W)
Score
Benchmark
FP32 (float)
Radeon R9 390
+1677%
5.12 TFLOPS
Radeon HD 2900 GT
0.288 TFLOPS
Radeon R9 390
VS
Radeon HD 2900 GT
Graphics Card
Jun 2015
Release Date
Nov 2007
Pirate Islands
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 1.0 x16
Clock Speeds
-
-
-
-
-
-
1500 MHz
Memory Clock
800 MHz
Memory
8GB
Memory Size
256MB
GDDR5
Memory Type
GDDR3
512bit
Memory Bus
256bit
384.0GB/s
Bandwidth
51.20GB/s
Render Config
40
Compute Units
3
-
-
-
2560
Shading Units
240
160
TMUs
12
64
ROPs
12
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
-
1024 KB
L2 Cache
128 KB
-
-
-
Theoretical Performance
64.00 GPixel/s
Pixel Rate
7.212 GPixel/s
160.0 GTexel/s
Texture Rate
7.212 GTexel/s
-
-
-
5.120 TFLOPS
FP32 (float)
288.5 GFLOPS
640.0 GFLOPS
FP64 (double)
-
Board Design
275W
TDP
150W
600 W
Suggested PSU
450 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x S-Video
1x 6-pin + 1x 8-pin
Power Connectors
1x 8-pin
Graphics Processor
Grenada
GPU Name
R600
Grenada PRO (215-0880030)
GPU Variant
R600 GT (215RGFDKA13FG)
GCN 2.0
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
80 nm
6.2 billion
Transistors
0.72 billion
438 mm²
Die Size
420 mm²
Graphics Features
12 (12_0)
DirectX
10.0 (10_0)
4.6
OpenGL
3.3 (full) 4.0 (partial)
2.0
OpenCL
N/A
1.2
Vulkan
N/A
-
-
-
6.3
Shader Model
4.0
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