Radeon RX 6600 vs GeForce GT 645 OEM

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Primary details

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

Place in the rankingnot rated110
Place by popularitynot in top-10015
Cost-effectiveness evaluationno data67.86
Power efficiencyno data20.75
ArchitectureFermi 2.0 (2010−2014)RDNA 2.0 (2020−2024)
GPU code nameGF114Navi 23
Market segmentDesktopDesktop
Release date24 April 2012 (12 years ago)13 October 2021 (3 years ago)
Launch price (MSRP)no data$329

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 cores2881792
Core clock speed776 MHz1626 MHz
Boost clock speedno data2491 MHz
Number of transistors1,950 million11,060 million
Manufacturing process technology40 nm7 nm
Power consumption (TDP)102 Watt132 Watt
Texture fill rate37.25279.0
Floating-point processing power0.894 TFLOPS8.928 TFLOPS
ROPs2464
TMUs48112
Ray Tracing Coresno data28

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).

InterfacePCIe 2.0 x16PCIe 4.0 x8
Length210 mm190 mm
Width2-slot2-slot
Supplementary power connectorsno data1x 8-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 typeGDDR5GDDR6
Maximum RAM amount1 GB8 GB
Memory bus width192 Bit128 Bit
Memory clock speed957 MHz1750 MHz
Memory bandwidth91.87 GB/s224.0 GB/s
Shared memory--

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 Connectors2x DVI, 1x mini-HDMI1x HDMI, 3x DisplayPort
HDMI++

API compatibility

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

DirectX12 (11_0)12.0 Ultimate (12_2)
Shader Model5.16.5
OpenGL4.64.6
OpenCL1.12.1
VulkanN/A1.2
CUDA2.1-

Pros & cons summary


Recency 24 April 2012 13 October 2021
Maximum RAM amount 1 GB 8 GB
Chip lithography 40 nm 7 nm
Power consumption (TDP) 102 Watt 132 Watt

GT 645 OEM has 29.4% lower power consumption.

RX 6600, on the other hand, has an age advantage of 9 years, a 700% higher maximum VRAM amount, and a 471.4% more advanced lithography process.

We couldn't decide between GeForce GT 645 OEM and Radeon RX 6600. We've got no test results to judge.


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

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NVIDIA GeForce GT 645 OEM
GeForce GT 645 OEM
AMD Radeon RX 6600
Radeon RX 6600

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Community ratings

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Questions & comments

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