ATI Radeon HD 4250 IGP vs GeForce GTX 645 OEM

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Architecture	Kepler (2012−2018)	TeraScale (2005−2013)
GPU code name	GK106	RS880
Market segment	Desktop	Desktop
Release date	22 April 2013 (12 years ago)	1 March 2010 (15 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	576	40
Core clock speed	824 MHz	498 MHz
Boost clock speed	no data	560 MHz
Number of transistors	2,540 million	181 million
Manufacturing process technology	28 nm	55 nm
Power consumption (TDP)	65 Watt	no data
Texture fill rate	39.55	2.240
Floating-point processing power	0.9492 TFLOPS	0.0448 TFLOPS
ROPs	16	4
TMUs	48	4
L1 Cache	48 KB	no data
L2 Cache	256 KB	no data

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	147 mm	no data
Width	1-slot	IGP
Supplementary power connectors	None	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	GDDR5	System Shared
Maximum RAM amount	1 GB	System Shared
Memory bus width	128 Bit	System Shared
Memory clock speed	1000 MHz	System Shared
Memory bandwidth	64 GB/s	no data
Shared memory	-	+

Connectivity and outputs

This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.

Display Connectors	1x DVI, 1x HDMI, 1x DisplayPort	No outputs
HDMI	+	-

API and SDK support

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

DirectX	12 (11_0)	10.1 (10_1)
Shader Model	5.1	4.1
OpenGL	4.6	3.3
OpenCL	1.2	1.0
Vulkan	1.1.126	N/A
CUDA	3.0	-

Pros & cons summary

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Recency	22 April 2013	1 March 2010
Chip lithography	28 nm	55 nm

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