GeForce 7900 GT vs 820A

Place in the ranking	995	1183
Place by popularity	not in top-100	not in top-100
Power efficiency	6.58	0.96
Architecture	Fermi 2.0 (2010−2014)	Curie (2003−2013)
GPU code name	GF117	G71
Market segment	Laptop	Desktop
Release date	17 March 2014 (10 years ago)	9 March 2006 (18 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	96	no data
Core clock speed	775 MHz	450 MHz
Number of transistors	585 million	278 million
Manufacturing process technology	28 nm	90 nm
Power consumption (TDP)	15 Watt	48 Watt
Texture fill rate	12.40	10.80
Floating-point processing power	0.2976 TFLOPS	no data
ROPs	8	16
TMUs	16	24

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).

Interface	PCIe 2.0 x16	PCIe 1.0 x16
Width	no data	1-slot
Supplementary power connectors	no data	1x 6-pin

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	DDR3	GDDR3
Maximum RAM amount	1 GB	256 MB
Memory bus width	64 Bit	256 Bit
Memory clock speed	900 MHz	660 MHz
Memory bandwidth	14.4 GB/s	42.24 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

No outputs

2x DVI, 1x S-Video

API compatibility

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

DirectX	12 (11_0)	9.0c (9_3)
Shader Model	5.1	3.0
OpenGL	4.6	2.1
OpenCL	1.1	N/A
Vulkan	N/A	N/A
CUDA	2.1	-

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.

GeForce 820A 1.44
+115%

7900 GT 0.67

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.

GeForce 820A 555
+115%

7900 GT 258

Gaming performance

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

Pros & cons summary

Performance score	1.44	0.67
Recency	17 March 2014	9 March 2006
Maximum RAM amount	1 GB	256 MB
Chip lithography	28 nm	90 nm
Power consumption (TDP)	15 Watt	48 Watt

GeForce 820A has a 114.9% higher aggregate performance score, an age advantage of 8 years, a 300% higher maximum VRAM amount, a 221.4% more advanced lithography process, and 220% lower power consumption.

The GeForce 820A is our recommended choice as it beats the GeForce 7900 GT in performance tests.

Be aware that GeForce 820A is a notebook card while GeForce 7900 GT is a desktop one.

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