ATI Radeon HD 2900 XT vs AMD Radeon Sky 500
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XT and 4GB VRAM Radeon Sky 500 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon Sky 500 's Advantages
Released 5 years and 10 months late
More VRAM (4GB vs 512GB)
Larger VRAM bandwidth (153.6GB/s vs 106.0GB/s)
960 additional rendering cores
Lower TDP (150W vs 215W)
Score
Benchmark
FP32 (float)
Radeon HD 2900 XT
0.476 TFLOPS
Radeon Sky 500
+410%
2.432 TFLOPS
Graphics Card
May 2007
Release Date
Mar 2013
Radeon R600
Generation
Radeon Sky
Desktop
Type
Desktop
PCIe 1.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
-
-
-
-
-
828 MHz
Memory Clock
1200 MHz
Memory
512MB
Memory Size
4GB
GDDR3
Memory Type
GDDR5
512bit
Memory Bus
256bit
106.0GB/s
Bandwidth
153.6GB/s
Render Config
4
Compute Units
20
-
-
-
320
Shading Units
1280
16
TMUs
80
16
ROPs
32
-
-
-
-
-
-
-
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
512 KB
-
-
-
Theoretical Performance
11.89 GPixel/s
Pixel Rate
30.40 GPixel/s
11.89 GTexel/s
Texture Rate
76.00 GTexel/s
-
-
-
475.5 GFLOPS
FP32 (float)
2.432 TFLOPS
-
FP64 (double)
152.0 GFLOPS
Board Design
215W
TDP
150W
550 W
Suggested PSU
450 W
2x DVI
1x S-Video
Outputs
1x DisplayPort 1.2
1x 6-pin + 1x 8-pin
Power Connectors
1x 6-pin
Graphics Processor
R600
GPU Name
Pitcairn
R600 XT
(215RGMDKA13FG)
GPU Variant
Pitcairn XT GL
(215-0828073)
TeraScale
Architecture
GCN 1.0
TSMC
Foundry
TSMC
80 nm
Process Size
28 nm
0.72 billion
Transistors
2.8 billion
420 mm²
Die Size
212 mm²
Graphics Features
10.0 (10_0)
DirectX
12 (11_1)
3.3 (full)
4.0 (partial)
OpenGL
4.6
N/A
OpenCL
1.2
N/A
Vulkan
1.2
-
-
-
4.0
Shader Model
5.1
