GeForce GT 820M vs Radeon HD 3870 X2

Place in performance ranking	873	937
Place by popularity	not in top-100	not in top-100
Value for money	0.04	0.02
Architecture	TeraScale (2005−2013)	Fermi 2.0 (2010−2014)
GPU code name	R680	GF117
Market segment	Desktop	Desktop
Release date	26 January 2008 (16 years old)	27 November 2013 (10 years old)
Launch price (MSRP)	$449	no data
Current price	$254 (0.6x MSRP)	$310

Value for money

Performance to price ratio. The higher, the better.

ATI HD 3870 X2 has 100% better value for money than GT 820M.

Technical specs

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	320	96
Core clock speed	825 MHz	775 MHz
Number of transistors	666 million	585 million
Manufacturing process technology	55 nm	28 nm
Power consumption (TDP)	165 Watt	15 Watt
Texture fill rate	13.20	12.40
Floating-point performance	2x 528.0 gflops	297.6 gflops

Size and 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).

Interface	PCIe 2.0 x16	PCIe 2.0 x16
Length	267 mm	no data
Width	2-slot	no data
Supplementary power connectors	1x 6-pin + 1x 8-pin	no data

Memory

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	GDDR3	DDR3
Maximum RAM amount	512 MB	1 GB
Memory bus width	256 Bit	64 Bit
Memory clock speed	1802 MHz	1800 MHz
Memory bandwidth	57.66 GB/s	14.4 GB/s

Video outputs and ports

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 S-Video

No outputs

API support

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

DirectX	10.1 (10_1)	12 (11_0)
Shader Model	4.1	5.1
OpenGL	3.3	4.6
OpenCL	N/A	1.1
Vulkan	N/A	N/A
CUDA	no data	2.1

Synthetic benchmark performance

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

Combined synthetic benchmark score

This is our combined benchmark performance 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.

ATI HD 3870 X2 1.83
+24.5%

GT 820M 1.47

Radeon HD 3870 X2 outperforms GeForce GT 820M by 24% based on our aggregated benchmark results.

Passmark

This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. 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.

Benchmark coverage: 25%

ATI HD 3870 X2 708
+24.2%

GT 820M 570

Radeon HD 3870 X2 outperforms GeForce GT 820M by 24% in Passmark.

Gaming performance

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

Advantages and disadvantages

Performance score	1.83	1.47
Recency	26 January 2008	27 November 2013
Maximum RAM amount	512 MB	1 GB
Chip lithography	55 nm	28 nm
Power consumption (TDP)	165 Watt	15 Watt