ATI Radeon DDR MAXX vs GeForce GT 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	Fermi 2.0 (2010−2014)	Rage 6 (2000−2007)
GPU code name	GF114	Rage 6
Market segment	Desktop	Desktop
Release date	24 April 2012 (13 years ago)	1 June 2000 (25 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	288	no data
Core clock speed	776 MHz	148 MHz
Number of transistors	1,950 million	30 million
Manufacturing process technology	40 nm	180 nm
Power consumption (TDP)	102 Watt	no data
Texture fill rate	37.25	0.89 ×2
Floating-point processing power	0.894 TFLOPS	no data
ROPs	24	2 ×2
TMUs	48	6 ×2
L1 Cache	384 KB	no data
L2 Cache	384 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 2.0 x16	AGP 2x
Length	210 mm	no data
Width	2-slot	1-slot
Supplementary power connectors	no data	1x Molex

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	DDR
Maximum RAM amount	1 GB	32 MB ×2
Memory bus width	192 Bit	128 Bit ×2
Memory clock speed	957 MHz	148 MHz
Memory bandwidth	91.87 GB/s	4.736 GB/s ×2

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	2x DVI, 1x mini-HDMI	2x VGA
HDMI	+	-

API and SDK support

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

DirectX	12 (11_0)	7.0
Shader Model	5.1	no data
OpenGL	4.6	1.3
OpenCL	1.1	N/A
Vulkan	N/A	N/A
CUDA	2.1	-

Pros & cons summary

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Recency	24 April 2012	1 June 2000
Maximum RAM amount	1 GB	32 MB
Chip lithography	40 nm	180 nm

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