ATI Mobility Radeon HD 3870 vs GeForce 845M

Place in the ranking	696	1008
Place by popularity	not in top-100	not in top-100
Power efficiency	8.21	1.75
Architecture	Maxwell (2014−2017)	TeraScale (2005−2013)
GPU code name	GM108	M88
Market segment	Laptop	Laptop
Release date	26 August 2015 (9 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	384	320
Core clock speed	1071 MHz	660 MHz
Boost clock speed	1176 MHz	no data
Number of transistors	1,870 million	666 million
Manufacturing process technology	28 nm	55 nm
Power consumption (TDP)	45 Watt	55 Watt
Texture fill rate	37.63	10.56
Floating-point processing power	0.9032 TFLOPS	0.4224 TFLOPS
ROPs	16	16
TMUs	32	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	medium sized	large
Interface	PCIe 3.0 x8	PCIe 2.0 x16

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	64 Bit	256 Bit
Memory clock speed	1253 MHz	850 MHz
Memory bandwidth	40.1 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

No outputs

Supported technologies

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

Optimus

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	+	-

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

21
+200%

7−8

−200%

FPS performance in popular games

Full HD
Low Preset

Cyberpunk 2077

7−8
+75%

4−5

−75%

Full HD
Medium Preset

Assassin's Creed Odyssey	10−12 +83.3%	6−7 −83.3%
Assassin's Creed Valhalla	3−4 +200%	1−2 −200%
Battlefield 5	9−10 +200%	3−4 −200%
Call of Duty: Modern Warfare	9−10 +125%	4−5 −125%
Cyberpunk 2077	7−8 +75%	4−5 −75%
Far Cry 5	8−9 +700%	1−2 −700%
Far Cry New Dawn	10−12 +267%	3−4 −267%
Forza Horizon 4	21−24 +667%	3−4 −667%
Hitman 3	9−10 +50%	6−7 −50%
Horizon Zero Dawn	27−30 +92.9%	14−16 −92.9%
Metro Exodus	7−8 +250%	2−3 −250%
Red Dead Redemption 2	10−11 +400%	2−3 −400%
Shadow of the Tomb Raider	14−16 +87.5%	8−9 −87.5%
Watch Dogs: Legion	40−45 +30.3%	30−35 −30.3%

Full HD
High Preset

Assassin's Creed Odyssey	10−12 +83.3%	6−7 −83.3%
Assassin's Creed Valhalla	3−4 +200%	1−2 −200%
Battlefield 5	9−10 +200%	3−4 −200%
Call of Duty: Modern Warfare	9−10 +125%	4−5 −125%
Cyberpunk 2077	7−8 +75%	4−5 −75%
Far Cry 5	8−9 +700%	1−2 −700%
Far Cry New Dawn	10−12 +267%	3−4 −267%
Forza Horizon 4	21−24 +667%	3−4 −667%
Hitman 3	9−10 +50%	6−7 −50%
Horizon Zero Dawn	27−30 +92.9%	14−16 −92.9%
Metro Exodus	7−8 +250%	2−3 −250%
Red Dead Redemption 2	10−11 +400%	2−3 −400%
Shadow of the Tomb Raider	14−16 +87.5%	8−9 −87.5%
The Witcher 3: Wild Hunt	16−18 +45.5%	10−12 −45.5%
Watch Dogs: Legion	40−45 +30.3%	30−35 −30.3%

Full HD
Ultra Preset

Assassin's Creed Odyssey	10−12 +83.3%	6−7 −83.3%
Assassin's Creed Valhalla	3−4 +200%	1−2 −200%
Call of Duty: Modern Warfare	9−10 +125%	4−5 −125%
Cyberpunk 2077	7−8 +75%	4−5 −75%
Far Cry 5	8−9 +700%	1−2 −700%
Forza Horizon 4	21−24 +667%	3−4 −667%
Hitman 3	9−10 +50%	6−7 −50%
Horizon Zero Dawn	27−30 +92.9%	14−16 −92.9%
Shadow of the Tomb Raider	14−16 +87.5%	8−9 −87.5%
The Witcher 3: Wild Hunt	16−18 +45.5%	10−12 −45.5%
Watch Dogs: Legion	40−45 +30.3%	30−35 −30.3%

Full HD
Epic Preset

Red Dead Redemption 2

10−11
+400%

2−3

−400%

1440p
High Preset

Battlefield 5	7−8 +600%	1−2 −600%
Far Cry New Dawn	6−7 +200%	2−3 −200%

1440p
Ultra Preset

Assassin's Creed Odyssey	4−5 +300%	1−2 −300%
Call of Duty: Modern Warfare	3−4	0−1
Cyberpunk 2077	2−3 +100%	1−2 −100%
Far Cry 5	4−5 +300%	1−2 −300%
Forza Horizon 4	4−5 +300%	1−2 −300%
Hitman 3	8−9 +14.3%	7−8 −14.3%
Horizon Zero Dawn	9−10 +80%	5−6 −80%
The Witcher 3: Wild Hunt	3−4 +200%	1−2 −200%
Watch Dogs: Legion	24−27 +300%	6−7 −300%

1440p
Epic Preset

Red Dead Redemption 2

8−9
+100%

4−5

−100%

4K
High Preset

Battlefield 5	2−3	0−1
Far Cry New Dawn	2−3	0−1
Hitman 3	0−1	0−1
Metro Exodus	0−1	0−1

4K
Ultra Preset

Assassin's Creed Odyssey	3−4 +200%	1−2 −200%
Assassin's Creed Valhalla	2−3 +100%	1−2 −100%
Call of Duty: Modern Warfare	1−2	0−1
Cyberpunk 2077	0−1	0−1
Far Cry 5	2−3	0−1
Forza Horizon 4	2−3	0−1
Watch Dogs: Legion	1−2	0−1

4K
Epic Preset

Red Dead Redemption 2

5−6
+66.7%

3−4

−66.7%

This is how GeForce 845M and ATI Mobility HD 3870 compete in popular games:

GeForce 845M is 200% faster in 1080p

Here's the range of performance differences observed across popular games:

in Far Cry 5, with 1080p resolution and the Medium Preset, the GeForce 845M is 700% faster.

All in all, in popular games:

Without exception, GeForce 845M surpassed ATI Mobility HD 3870 in all 48 of our tests.

Pros & cons summary

Performance score	3.95	1.40
Recency	26 August 2015	4 June 2008
Maximum RAM amount	2 GB	512 MB
Chip lithography	28 nm	55 nm
Power consumption (TDP)	45 Watt	55 Watt

GeForce 845M has a 182.1% higher aggregate performance score, an age advantage of 7 years, a 300% higher maximum VRAM amount, a 96.4% more advanced lithography process, and 22.2% lower power consumption.

The GeForce 845M is our recommended choice as it beats the Mobility Radeon HD 3870 in performance tests.

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