Radeon HD 6450A vs GeForce 7900 GT

Place in the ranking	1179	1175
Place by popularity	not in top-100	not in top-100
Power efficiency	0.96	1.85
Architecture	Curie (2003−2013)	TeraScale 2 (2009−2015)
GPU code name	G71	Caicos
Market segment	Desktop	Laptop
Release date	9 March 2006 (18 years ago)	7 April 2011 (13 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	no data	160
Core clock speed	450 MHz	625 MHz
Number of transistors	278 million	370 million
Manufacturing process technology	90 nm	40 nm
Power consumption (TDP)	48 Watt	25 Watt
Texture fill rate	10.80	5.000
Floating-point processing power	no data	0.2 TFLOPS
ROPs	16	4
TMUs	24	8

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 1.0 x16	MXM-A (3.0)
Width	1-slot	no data
Supplementary power connectors	1x 6-pin	no data

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	GDDR3	DDR3
Maximum RAM amount	256 MB	512 MB
Memory bus width	256 Bit	64 Bit
Memory clock speed	660 MHz	533 MHz
Memory bandwidth	42.24 GB/s	8.528 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

2x DVI, 1x S-Video

No outputs

API compatibility

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

DirectX	9.0c (9_3)	11.2 (11_0)
Shader Model	3.0	5.0
OpenGL	2.1	4.4
OpenCL	N/A	1.2
Vulkan	N/A	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.

7900 GT 0.67

HD 6450A 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.

7900 GT 258

HD 6450A 260
+0.8%

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

Recency	9 March 2006	7 April 2011
Maximum RAM amount	256 MB	512 MB
Chip lithography	90 nm	40 nm
Power consumption (TDP)	48 Watt	25 Watt

HD 6450A has an age advantage of 5 years, a 100% higher maximum VRAM amount, a 125% more advanced lithography process, and 92% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between GeForce 7900 GT and Radeon HD 6450A.

Be aware that GeForce 7900 GT is a desktop card while Radeon HD 6450A is a notebook one.

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