Radeon Instinct MI25 vs GeForce GTX 660

Place in the ranking	431	388
Place by popularity	89	not in top-100
Cost-effectiveness evaluation	3.28	no data
Power efficiency	5.44	3.16
Architecture	Kepler (2012−2018)	GCN 5.0 (2017−2020)
GPU code name	GK106	Vega 10
Market segment	Desktop	Desktop
Release date	6 September 2012 (12 years ago)	27 June 2017 (7 years ago)
Launch price (MSRP)	$229	no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	960	4096
CUDA cores	960	no data
Core clock speed	980 MHz	1400 MHz
Boost clock speed	1033 MHz	1500 MHz
Number of transistors	2,540 million	12,500 million
Manufacturing process technology	28 nm	14 nm
Power consumption (TDP)	140 Watt	300 Watt
Texture fill rate	82.56	384.0
Floating-point processing power	1.981 TFLOPS	12.29 TFLOPS
ROPs	24	64
TMUs	80	256

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Bus support	PCI Express 3.0	no data
Interface	PCIe 3.0 x16	PCIe 3.0 x16
Length	241 mm	267 mm
Height	4.376" (11.1 cm)	no data
Width	2-slot	2-slot
Supplementary power connectors	1x 6-pin	2x 8-pin
SLI options	+	-

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory type	GDDR5	HBM2
Maximum RAM amount	2 GB	16 GB
Memory bus width	192-bit GDDR5	2048 Bit
Memory clock speed	6.0 GB/s	852 MHz
Memory bandwidth	144.2 GB/s	436.2 GB/s

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors	One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort	No outputs
Multi monitor support	4 displays	no data
HDMI	+	-
HDCP	+	-
Maximum VGA resolution	2048x1536	no data
Audio input for HDMI	Internal	no data

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

3D Blu-Ray	+	-
3D Gaming	+	-
3D Vision	+	-

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	12 (11_0)	12 (12_1)
Shader Model	5.1	6.4
OpenGL	4.3	4.6
OpenCL	1.2	2.0
Vulkan	1.1.126	1.1.125
CUDA	+	-

Synthetic benchmark performance

Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

GTX 660 10.37

Instinct MI25 12.91
+24.5%

Passmark

This is the most ubiquitous GPU benchmark. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

GTX 660 3999

Instinct MI25 4978
+24.5%

GeekBench 5 OpenCL

Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses OpenCL API by Khronos Group.

GTX 660 11382

Instinct MI25 67679
+495%

GeekBench 5 Vulkan

GTX 660 11397

Instinct MI25 71503
+527%

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Average FPS across all PC games

Here are the average frames per second in a large set of popular games across different resolutions:

Full HD

−17%

55−60
+17%

Pros & cons summary

Performance score	10.37	12.91
Recency	6 September 2012	27 June 2017
Maximum RAM amount	2 GB	16 GB
Chip lithography	28 nm	14 nm
Power consumption (TDP)	140 Watt	300 Watt

GTX 660 has 114.3% lower power consumption.

Instinct MI25, on the other hand, has a 24.5% higher aggregate performance score, an age advantage of 4 years, a 700% higher maximum VRAM amount, and a 100% more advanced lithography process.

The Radeon Instinct MI25 is our recommended choice as it beats the GeForce GTX 660 in performance tests.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.