ATI Mobility Radeon HD 3870 vs GeForce GTX 660 OEM

Place in the ranking	736	1006
Place by popularity	not in top-100	not in top-100
Power efficiency	1.80	1.76
Architecture	Kepler (2012−2018)	TeraScale (2005−2013)
GPU code name	GK104	M88
Market segment	Desktop	Laptop
Release date	22 August 2012 (12 years ago)	4 June 2008 (16 years ago)

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	1152	320
Core clock speed	823 MHz	660 MHz
Boost clock speed	888 MHz	no data
Number of transistors	3,540 million	666 million
Manufacturing process technology	28 nm	55 nm
Power consumption (TDP)	130 Watt	55 Watt
Texture fill rate	85.25	10.56
Floating-point processing power	2.046 TFLOPS	0.4224 TFLOPS
ROPs	32	16
TMUs	96	16

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).

Laptop size	no data	large
Interface	PCIe 3.0 x16	PCIe 2.0 x16
Length	241 mm	no data
Width	2-slot	no data
Supplementary power connectors	1x 6-pin	no data

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	GDDR3
Maximum RAM amount	2 GB	512 MB
Memory bus width	256 Bit	256 Bit
Memory clock speed	1400 MHz	850 MHz
Memory bandwidth	179.2 GB/s	54.4 GB/s
Shared memory	-	-

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	2x DVI, 1x HDMI, 1x DisplayPort	No outputs
HDMI	+	-

API compatibility

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

DirectX	12 (11_0)	10.1 (10_1)
Shader Model	5.1	4.1
OpenGL	4.6	3.3
OpenCL	1.2	N/A
Vulkan	1.1.126	N/A
CUDA	3.0	-

Gaming performance

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

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

4−5

+0%

4−5

+0%

Full HD
Medium Preset

Assassin's Creed Odyssey	6−7 +0%	6−7 +0%
Call of Duty: Modern Warfare	4−5 +0%	4−5 +0%
Cyberpunk 2077	4−5 +0%	4−5 +0%
Far Cry 5	1−2 +0%	1−2 +0%
Far Cry New Dawn	3−4 +0%	3−4 +0%
Forza Horizon 4	3−4 +0%	3−4 +0%
Hitman 3	6−7 +0%	6−7 +0%
Horizon Zero Dawn	14−16 +0%	14−16 +0%
Red Dead Redemption 2	2−3 +0%	2−3 +0%
Shadow of the Tomb Raider	8−9 +0%	8−9 +0%
Watch Dogs: Legion	30−35 +0%	30−35 +0%

Full HD
High Preset

Assassin's Creed Odyssey	6−7 +0%	6−7 +0%
Call of Duty: Modern Warfare	4−5 +0%	4−5 +0%
Cyberpunk 2077	4−5 +0%	4−5 +0%
Far Cry 5	1−2 +0%	1−2 +0%
Far Cry New Dawn	3−4 +0%	3−4 +0%
Forza Horizon 4	3−4 +0%	3−4 +0%
Hitman 3	6−7 +0%	6−7 +0%
Horizon Zero Dawn	14−16 +0%	14−16 +0%
Red Dead Redemption 2	2−3 +0%	2−3 +0%
Shadow of the Tomb Raider	8−9 +0%	8−9 +0%
The Witcher 3: Wild Hunt	10−12 +0%	10−12 +0%
Watch Dogs: Legion	30−35 +0%	30−35 +0%

Full HD
Ultra Preset

Assassin's Creed Odyssey	6−7 +0%	6−7 +0%
Call of Duty: Modern Warfare	4−5 +0%	4−5 +0%
Cyberpunk 2077	4−5 +0%	4−5 +0%
Far Cry 5	1−2 +0%	1−2 +0%
Forza Horizon 4	3−4 +0%	3−4 +0%
Hitman 3	6−7 +0%	6−7 +0%
Horizon Zero Dawn	14−16 +0%	14−16 +0%
Shadow of the Tomb Raider	8−9 +0%	8−9 +0%
The Witcher 3: Wild Hunt	10−12 +0%	10−12 +0%
Watch Dogs: Legion	30−35 +0%	30−35 +0%

Full HD
Epic Preset

Red Dead Redemption 2

2−3

+0%

2−3

+0%

1440p
High Preset

Battlefield 5	1−2 +0%	1−2 +0%
Far Cry New Dawn	2−3 +0%	2−3 +0%

1440p
Ultra Preset

Assassin's Creed Odyssey	1−2 +0%	1−2 +0%
Call of Duty: Modern Warfare	0−1	0−1
Cyberpunk 2077	1−2 +0%	1−2 +0%
Far Cry 5	1−2 +0%	1−2 +0%
Hitman 3	7−8 +0%	7−8 +0%
Horizon Zero Dawn	5−6 +0%	5−6 +0%
The Witcher 3: Wild Hunt	1−2 +0%	1−2 +0%
Watch Dogs: Legion	6−7 +0%	6−7 +0%

1440p
Epic Preset

Red Dead Redemption 2

4−5

+0%

4−5

+0%

4K
High Preset

Far Cry New Dawn

0−1

4K
Ultra Preset

Assassin's Creed Odyssey	1−2 +0%	1−2 +0%
Assassin's Creed Valhalla	1−2 +0%	1−2 +0%
Call of Duty: Modern Warfare	0−1	0−1
Far Cry 5	0−1	0−1

4K
Epic Preset

Red Dead Redemption 2

3−4

+0%

3−4

+0%

All in all, in popular games:

there's a draw in 48 tests (100%)

Pros & cons summary

Performance score	3.36	1.39
Recency	22 August 2012	4 June 2008
Maximum RAM amount	2 GB	512 MB
Chip lithography	28 nm	55 nm
Power consumption (TDP)	130 Watt	55 Watt

GTX 660 OEM has a 141.7% higher aggregate performance score, an age advantage of 4 years, a 300% higher maximum VRAM amount, and a 96.4% more advanced lithography process.

ATI Mobility HD 3870, on the other hand, has 136.4% lower power consumption.

The GeForce GTX 660 OEM is our recommended choice as it beats the Mobility Radeon HD 3870 in performance tests.

Be aware that GeForce GTX 660 OEM is a desktop card while Mobility Radeon HD 3870 is a notebook one.

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