AMD Radeon R9 255 OEM vs AMD Radeon R9 M365X

Edit	AMD Radeon R9 255 OEM Check Price	AMD Radeon R9 M365X Check Price

Table of Contents

Graphics Processor
Graphics Card
Clocks
Memory Configuration
Render Configuration
Performance
Dimensions & Outputs
API Support & Features
Other Features
Mobile graphics

Graphics Processor

GPU model	Cape Verde	Tropo
GPU variant	Cape Verde PRX	Tropo XT
Architecture	GCN 1.0	GCN 1.0
Foundry	TSMC	TSMC
Manufacturing process	28 nm	28 nm
Number of transistors	1,500 million	1,500 million
Die size	123 mm²	123 mm²

Graphics Card

Release date	Dec 21st, 2013	—
Generation	Volcanic Islands	—
Production	End-of-life	—
Interface	PCIe 3.0 x16	—
Predecessor	Sea Islands	—
Successor	Pirate Islands	—

Clocks

Base clock	900 MHz	900 MHz
Boost clock	930 MHz	925 MHz
Memory clock	1150 MHz 4.6 Gbps effective	1125 MHz 4.5 Gbps effective

Memory Configuration

Memory size	2 GB	4 GB
Memory type	GDDR5	GDDR5
Memory bus width	128 bit	128 bit
Bandwidth	73.60 GB/s	72.00 GB/s

Render Configuration

Shading units	512	640
TMUs	32	40
ROPs	16	16
Compute units	8	10
Cache L1	16 KB (per CU)	16 KB (per CU)
Cache L2	256 KB	256 KB

Performance

Pixel rate	14.88 GPixel/s	14.80 GPixel/s
Texture rate	29.76 GTexel/s	37.00 GTexel/s
FP32 (float) performance	952.3 GFLOPS	1,184 GFLOPS
FP64 (double) performance	59.52 GFLOPS (1:16)	74.00 GFLOPS (1:16)

Dimensions & Outputs

Slot width	Dual-slot	—
TDP	65 W	unknown
Suggested PSU	250 W	—
Outputs	No outputs	No outputs
Power connectors	1x 6-pin	—
Board number	C750	—

API Support & Features

DirectX	12 (11_1)	12 (11_1)
OpenGL	4.6	4.6
OpenCL	1.2	1.2
Vulkan	1.2	1.2
Shader model	5.1	5.1

Other Features

Mobile graphics

Release date	—	May 5th, 2015
Generation	—	Crystal System (R9 M300)
Production	—	End-of-life
Interface	—	PCIe 3.0 x16
Predecessor	—	Solar System
Successor	—	Mobility Radeon

Compare