GeForce 7950 GT vs GT 640

Place in the ranking	767	1123
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.20	0.05
Power efficiency	3.27	0.97
Architecture	Kepler (2012−2018)	Curie (2003−2013)
GPU code name	GK107	G71
Market segment	Desktop	Desktop
Release date	5 June 2012 (12 years ago)	6 August 2006 (18 years ago)
Launch price (MSRP)	$99	$114.95

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

GT 640 has 300% better value for money than 7950 GT.

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	384	no data
Core clock speed	902 MHz	550 MHz
Number of transistors	1,270 million	278 million
Manufacturing process technology	28 nm	90 nm
Power consumption (TDP)	65 Watt	65 Watt
Texture fill rate	28.86	13.20
Floating-point processing power	0.6927 TFLOPS	no data
ROPs	16	16
TMUs	32	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 3.0 x16	PCIe 1.0 x16
Length	145 mm	no data
Width	1-slot	1-slot
Supplementary power connectors	None	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	2 GB	512 MB
Memory bus width	128 Bit	256 Bit
Memory clock speed	891 MHz	700 MHz
Memory bandwidth	28.51 GB/s	44.8 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	1x DVI, 1x HDMI, 1x DisplayPort	2x DVI, 1x S-Video
HDMI	+	-

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	1.2	N/A
Vulkan	1.1.126	N/A
CUDA	3.0	-

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.

GT 640 3.05
+239%

7950 GT 0.90

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.

GT 640 1176
+239%

7950 GT 347

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	3.05	0.90
Recency	5 June 2012	6 August 2006
Maximum RAM amount	2 GB	512 MB
Chip lithography	28 nm	90 nm

GT 640 has a 238.9% higher aggregate performance score, an age advantage of 5 years, a 300% higher maximum VRAM amount, and a 221.4% more advanced lithography process.

The GeForce GT 640 is our recommended choice as it beats the GeForce 7950 GT in performance tests.

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