Radeon HD 6650A vs GeForce 7900 GTX

Place in the ranking	1105	862
Place by popularity	not in top-100	not in top-100
Power efficiency	0.82	3.31
Architecture	Curie (2003−2013)	TeraScale 2 (2009−2015)
GPU code name	G71	Onega
Market segment	Desktop	Laptop
Release date	9 March 2006 (18 years ago)	19 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	480
Core clock speed	650 MHz	600 MHz
Number of transistors	278 million	716 million
Manufacturing process technology	90 nm	40 nm
Power consumption (TDP)	84 Watt	45 Watt
Texture fill rate	15.60	14.40
Floating-point processing power	no data	0.576 TFLOPS
ROPs	16	8
TMUs	24	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 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	512 MB	1 GB
Memory bus width	256 Bit	128 Bit
Memory clock speed	800 MHz	900 MHz
Memory bandwidth	51.2 GB/s	28.8 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 GTX 1.00

HD 6650A 2.17
+117%

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 GTX 387

HD 6650A 835
+116%

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	1.00	2.17
Recency	9 March 2006	19 April 2011
Maximum RAM amount	512 MB	1 GB
Chip lithography	90 nm	40 nm
Power consumption (TDP)	84 Watt	45 Watt

HD 6650A has a 117% higher aggregate performance score, an age advantage of 5 years, a 100% higher maximum VRAM amount, a 125% more advanced lithography process, and 86.7% lower power consumption.

The Radeon HD 6650A is our recommended choice as it beats the GeForce 7900 GTX in performance tests.

Be aware that GeForce 7900 GTX is a desktop card while Radeon HD 6650A is a notebook one.

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