Radeon HD 8400 vs GeForce 7900 GT

Place in performance ranking	1140	1134
Place by popularity	not in top-100	not in top-100
Value for money	no data	0.08
Architecture	Curie (2003−2013)	GCN (2011−2017)
GPU code name	G71	Kabini
Market segment	Desktop	Laptop
Release date	9 March 2006 (18 years ago)	23 May 2013 (10 years ago)
Current price	$241	$78

Value for money

Performance to price ratio. The higher, the better.

7900 GT and HD 8400 have a nearly equal value for money.

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	no data	128
Core clock speed	450 MHz	600 MHz
Number of transistors	278 million	1,178 million
Manufacturing process technology	90 nm	28 nm
Power consumption (TDP)	48 Watt	25 Watt
Texture fill rate	10.80	3.200

Size and compatibility

Information on GeForce 7900 GT and Radeon HD 8400 compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.

Interface	PCIe 1.0 x16	IGP
Width	1-slot	no data
Supplementary power connectors	1x 6-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	System Shared
Maximum RAM amount	256 MB	System Shared
Memory bus width	256 Bit	System Shared
Memory clock speed	1320 MHz	System Shared
Memory bandwidth	42.24 GB/s	no data
Shared memory	no data	+

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	9.0c (9_3)	12 (12_0)
Shader Model	3.0	6.3
OpenGL	2.1	4.6
OpenCL	N/A	2.0
Vulkan	N/A	1.2.131

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.

7900 GT 0.67

HD 8400 0.67

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%

7900 GT 258

HD 8400 261
+1.2%

Radeon HD 8400 outperforms GeForce 7900 GT by 1% in Passmark.