GeForce 7900 GT vs Radeon HD 8400E

Place in the ranking	1161	1176
Place by popularity	not in top-100	not in top-100
Power efficiency	1.97	0.97
Architecture	GCN 2.0 (2013−2017)	Curie (2003−2013)
GPU code name	Kalindi	G71
Market segment	Desktop	Desktop
Release date	23 April 2013 (11 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	128	no data
Core clock speed	600 MHz	450 MHz
Number of transistors	1,178 million	278 million
Manufacturing process technology	28 nm	90 nm
Power consumption (TDP)	25 Watt	48 Watt
Texture fill rate	4.800	10.80
Floating-point processing power	0.1536 TFLOPS	no data
ROPs	4	16
TMUs	8	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	IGP	PCIe 1.0 x16
Width	IGP	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	System Shared	GDDR3
Maximum RAM amount	System Shared	256 MB
Memory bus width	System Shared	256 Bit
Memory clock speed	System Shared	660 MHz
Memory bandwidth	no data	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 (12_0)	9.0c (9_3)
Shader Model	6.3	3.0
OpenGL	4.6	2.1
OpenCL	2.0	N/A
Vulkan	1.2.131	N/A

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.

HD 8400E 0.71
+6%

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.

HD 8400E 275
+6.6%

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	0.71	0.67
Recency	23 April 2013	9 March 2006
Chip lithography	28 nm	90 nm
Power consumption (TDP)	25 Watt	48 Watt

HD 8400E has a 6% higher aggregate performance score, an age advantage of 7 years, a 221.4% more advanced lithography process, and 92% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Radeon HD 8400E and GeForce 7900 GT.

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