Home GPU Comparison ATI Radeon HD 2900 XTX vs AMD Radeon HD 6390

ATI Radeon HD 2900 XTX vs AMD Radeon HD 6390

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XTX and 1024MB VRAM Radeon HD 6390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 2900 XTX 's Advantages
Larger VRAM bandwidth (106.0GB/s vs 16.00GB/s)
AMD Radeon HD 6390 's Advantages
More VRAM (1024GB vs 512GB)
Lower TDP (39W vs 240W)

Score

Benchmark

FP32 (float)
Radeon HD 2900 XTX +35%
0.476 TFLOPS
Radeon HD 6390
0.352 TFLOPS
VS

Graphics Card

Unknown
Release Date
Jul 2011
Radeon R600
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 1.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
828 MHz
Memory Clock
500 MHz

Memory

512MB
Memory Size
1024MB
GDDR3
Memory Type
DDR2
512bit
Memory Bus
128bit
106.0GB/s
Bandwidth
16.00GB/s

Render Config

4
Compute Units
4
-
-
-
320
Shading Units
320
16
TMUs
16
16
ROPs
8
-
-
-
-
-
-
-
L1 Cache
8 KB (per CU)
256 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

11.89 GPixel/s
Pixel Rate
4.400 GPixel/s
11.89 GTexel/s
Texture Rate
8.800 GTexel/s
-
-
-
475.5 GFLOPS
FP32 (float)
352.0 GFLOPS
-
-
-

Board Design

240W
TDP
39W
550 W
Suggested PSU
200 W
2x DVI 1x S-Video
Outputs
1x DVI 1x HDMI 1.3a 1x VGA
2x 6-pin
Power Connectors
None

Graphics Processor

R600
GPU Name
Redwood
R600 XTX A11 (215RGMDKA11FG)
GPU Variant
Redwood LE
TeraScale
Architecture
TeraScale 2
TSMC
Foundry
TSMC
80 nm
Process Size
40 nm
0.72 billion
Transistors
0.627 billion
420 mm²
Die Size
104 mm²

Graphics Features

10.0 (10_0)
DirectX
11.2 (11_0)
3.3 (full) 4.0 (partial)
OpenGL
4.4
N/A
OpenCL
1.2
N/A
Vulkan
N/A
-
-
-
4.0
Shader Model
5.0

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