AMD Radeon R9 270 1024SP vs NVIDIA GeForce GTX 660 Rev. 2

Edit	AMD Radeon R9 270 1024SP Check Price	NVIDIA GeForce GTX 660 Rev. 2 Check Price

Table of Contents

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

Graphics Processor

GPU model	Pitcairn	GK104
GPU variant	Pitcairn PRO (215-0828062)	—
Architecture	GCN 1.0	Kepler
Foundry	TSMC	TSMC
Manufacturing process	28 nm	28 nm
Number of transistors	2,800 million	3,540 million
Die size	212 mm²	294 mm²

Graphics Card

Release date	Mar 13th, 2015	Sep 13th, 2014
Generation	Volcanic Islands	GeForce 600
Production	End-of-life	End-of-life
Interface	PCIe 3.0 x16	PCIe 3.0 x16
Reviews	32 in our database	77 in our database
Predecessor	Sea Islands	GeForce 500
Successor	Pirate Islands	GeForce 700

Clocks

Base clock	900 MHz	980 MHz
Boost clock	925 MHz	1032 MHz
Memory clock	1200 MHz 4.8 Gbps effective	1502 MHz 6 Gbps effective

Memory Configuration

Memory size	2 GB	2 GB
Memory type	GDDR5	GDDR5
Memory bus width	256 bit	192 bit
Bandwidth	153.6 GB/s	144.2 GB/s

Render Configuration

Shading units	1024	960
TMUs	64	80
ROPs	32	24
Compute units	16	—
Cache L1	16 KB (per CU)	16 KB (per SMX)
Cache L2	512 KB	384 KB
SMX count	—	5

Performance

Pixel rate	29.60 GPixel/s	20.64 GPixel/s
Texture rate	59.20 GTexel/s	82.56 GTexel/s
FP32 (float) performance	1.894 TFLOPS	1.981 TFLOPS
FP64 (double) performance	118.4 GFLOPS (1:16)	82.56 GFLOPS (1:24)

Dimensions & Outputs

Slot width	Dual-slot	Dual-slot
TDP	150 W	140 W
Suggested PSU	450 W	300 W
Outputs	2x DVI1x HDMI1x DisplayPort	2x DVI1x HDMI1x DisplayPort
Power connectors	1x 6-pin	1x 6-pin
Board number	C403	P2004 SKU 11
Length	—	241 mm 9.5 inches

API Support & Features

DirectX	12 (11_1)	12 (11_0)
OpenGL	4.6	4.6
OpenCL	1.2	3.0
Vulkan	1.2	1.1
Shader model	5.1	5.1
CUDA	—	3.0

Other Features

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