Radeon HD 6450 vs GeForce GT 640 OEM

Place in the ranking	935	1232
Place by popularity	not in top-100	not in top-100
Power efficiency	2.33	1.94
Architecture	Kepler (2012−2018)	TeraScale 2 (2009−2015)
GPU code name	GK107	Caicos
Market segment	Desktop	Desktop
Design	no data	reference
Release date	24 April 2012 (12 years ago)	7 April 2011 (13 years ago)
Launch price (MSRP)	no data	$55

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

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	160
Core clock speed	797 MHz	no data
Boost clock speed	no data	750 MHz
Number of transistors	1,270 million	370 million
Manufacturing process technology	28 nm	40 nm
Power consumption (TDP)	50 Watt	30 Watt
Texture fill rate	25.50	5.000
Floating-point processing power	0.6121 TFLOPS	0.2 TFLOPS
ROPs	16	4
TMUs	32	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).

Bus support	no data	PCIe 2.0 x8
Interface	PCIe 3.0 x16	PCIe 2.0 x16
Length	145 mm	168 mm
Width	1-slot	1-slot
Supplementary power connectors	None	None

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	GDDR5
Maximum RAM amount	2 GB	1 GB
Memory bus width	128 Bit	64 Bit
Memory clock speed	891 MHz	800 MHz
Memory bandwidth	28.51 GB/s	25.6 GB/s
Memory bandwidth	no data	8.5-12.8 GB/x (DDR3) or 25.6-28.8 GB/s (GDDR5)

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	1x DVI, 1x HDMI, 1x VGA
Eyefinity	-	+
Number of Eyefinity displays	no data	4
HDMI	+	+
DisplayPort support	-	+

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

CrossFire

API compatibility

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

DirectX	12 (11_0)	DirectX® 11
Shader Model	5.1	5.0
OpenGL	4.6	4.4
OpenCL	1.2	1.2
Vulkan	1.1.126	-
CUDA	3.0	-

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	1.70	0.51
Recency	24 April 2012	7 April 2011
Maximum RAM amount	2 GB	1 GB
Chip lithography	28 nm	40 nm
Power consumption (TDP)	50 Watt	30 Watt

GT 640 OEM has a 233.3% higher aggregate performance score, an age advantage of 1 year, a 100% higher maximum VRAM amount, and a 42.9% more advanced lithography process.

HD 6450, on the other hand, has 66.7% lower power consumption.

The GeForce GT 640 OEM is our recommended choice as it beats the Radeon HD 6450 in performance tests.

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