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

Graphics Processor

GPU model Curacao GK104
GPU variant Curacao PRO (215-0848000)
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 Nov 13th, 2013 Sep 13th, 2014
Generation Volcanic Islands GeForce 600
Production End-of-life End-of-life
Launch price 179 USD
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 1400 MHz 5.6 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 179.2 GB/s 144.2 GB/s

Render Configuration

Shading units 1280 960
TMUs 80 80
ROPs 32 24
Compute units 20
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 74.00 GTexel/s 82.56 GTexel/s
FP32 (float) performance 2.368 TFLOPS 1.981 TFLOPS
FP64 (double) performance 148.0 GFLOPS (1:16) 82.56 GFLOPS (1:24)

Dimensions & Outputs

Slot width Dual-slot Dual-slot
Length 210 mm 8.3 inches 241 mm 9.5 inches
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 C630, C631, C632 P2004 SKU 11

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

Compare

Sysrqmts browser extension icon
Stop overpaying for PC games!
See cheapest prices in Steam store with our browser extension.