Iris Plus Graphics 645 vs GeForce 8800 GTS 640

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Primary details

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

Place in the rankingnot rated664
Place by popularitynot in top-100not in top-100
Power efficiencyno data20.65
ArchitectureTesla (2006−2010)Generation 9.5 (2016−2020)
GPU code nameG80Coffee Lake GT3e
Market segmentDesktopLaptop
Release date8 November 2006 (18 years ago)7 October 2019 (5 years ago)
Launch price (MSRP)$449 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 cores96384
Core clock speed513 MHz300 MHz
Boost clock speedno data1050 MHz
Number of transistors681 millionno data
Manufacturing process technology90 nm14 nm+++
Power consumption (TDP)143 Watt15 Watt
Texture fill rate24.6250.40
Floating-point processing power0.2281 TFLOPS0.8064 TFLOPS
ROPs206
TMUs2448

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 1.0 x16Ring Bus
Length267 mmno data
Width2-slotno data
Supplementary power connectors1x 6-pinno 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 typeGDDR3System Shared
Maximum RAM amount640 MBSystem Shared
Memory bus width320 BitSystem Shared
Memory clock speed792 MHzSystem Shared
Memory bandwidth63.36 GB/sno data
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 S-VideoPortable Device Dependent

Supported technologies

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

Quick Syncno data+

API compatibility

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

DirectX11.1 (10_0)12 (12_1)
Shader Model4.06.4
OpenGL3.34.6
OpenCL1.13.0
VulkanN/A1.3
CUDA+-

Pros & cons summary


Recency 8 November 2006 7 October 2019
Chip lithography 90 nm 14 nm
Power consumption (TDP) 143 Watt 15 Watt

Iris Plus Graphics 645 has an age advantage of 12 years, a 542.9% more advanced lithography process, and 853.3% lower power consumption.

We couldn't decide between GeForce 8800 GTS 640 and Iris Plus Graphics 645. We've got no test results to judge.

Be aware that GeForce 8800 GTS 640 is a desktop card while Iris Plus Graphics 645 is a notebook one.


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 8800 GTS 640
GeForce 8800 GTS 640
Intel Iris Plus Graphics 645
Iris Plus Graphics 645

Comparisons with similar GPUs

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Community ratings

Here you can see the user ratings of the compared graphics cards, as well as rate them yourself.


3.6 45 votes

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2.9 121 vote

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Questions & comments

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