ATI Radeon HD 2900 XT vs AMD Radeon R9 270 1024SP
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XT and 2GB VRAM Radeon R9 270 1024SP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 270 1024SP 's Advantages
Released 7 years and 10 months late
Boost Clock925MHz
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (153.6GB/s vs 106.0GB/s)
704 additional rendering cores
Lower TDP (150W vs 215W)
Score
Benchmark
FP32 (float)
Radeon HD 2900 XT
0.476 TFLOPS
Radeon R9 270 1024SP
+297%
1.894 TFLOPS
Graphics Card
May 2007
Release Date
Mar 2015
Radeon R600
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 1.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
900 MHz
-
Boost Clock
925 MHz
828 MHz
Memory Clock
1200 MHz
Memory
512MB
Memory Size
2GB
GDDR3
Memory Type
GDDR5
512bit
Memory Bus
256bit
106.0GB/s
Bandwidth
153.6GB/s
Render Config
4
Compute Units
16
-
-
-
320
Shading Units
1024
16
TMUs
64
16
ROPs
32
-
-
-
-
-
-
-
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
512 KB
-
-
-
Theoretical Performance
11.89 GPixel/s
Pixel Rate
29.60 GPixel/s
11.89 GTexel/s
Texture Rate
59.20 GTexel/s
-
-
-
475.5 GFLOPS
FP32 (float)
1.894 TFLOPS
-
FP64 (double)
118.4 GFLOPS
Board Design
215W
TDP
150W
550 W
Suggested PSU
450 W
2x DVI
1x S-Video
Outputs
2x DVI
1x HDMI 1.4a
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 PRO
(215-0828062)
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
