ATI Radeon X1800 XT vs HD 8790M

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Primary details

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

Place in the ranking733not rated
Place by popularitynot in top-100not in top-100
ArchitectureGCN 1.0 (2011−2020)R500 (2005−2007)
GPU code nameMarsR520
Market segmentLaptopDesktop
Release date1 April 2013 (11 years ago)1 October 2005 (19 years ago)
Launch price (MSRP)no data$549

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 cores384no data
Core clock speed850 MHz600 MHz
Boost clock speed900 MHzno data
Number of transistors950 million321 million
Manufacturing process technology28 nm90 nm
Power consumption (TDP)unknown113 Watt
Texture fill rate21.609.600
Floating-point processing power0.6912 TFLOPSno data
ROPs816
TMUs2416

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).

Laptop sizemedium sizedno data
InterfaceMXM-A (3.0)PCIe 1.0 x16
Widthno data2-slot
Supplementary power connectorsNone1x 6-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 typeGDDR5GDDR3
Maximum RAM amount2 GB512 MB
Memory bus width128 Bit256 Bit
Memory clock speed1000 MHz700 MHz
Memory bandwidth64 GB/s44.8 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 ConnectorsNo outputs2x DVI, 1x S-Video

API compatibility

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

DirectX12 (11_1)9.0c (9_3)
Shader Model5.13.0
OpenGL4.62.0
OpenCL1.2N/A
Vulkan1.2.131N/A

Pros & cons summary


Recency 1 April 2013 1 October 2005
Maximum RAM amount 2 GB 512 MB
Chip lithography 28 nm 90 nm

HD 8790M has an age advantage of 7 years, a 300% higher maximum VRAM amount, and a 221.4% more advanced lithography process.

We couldn't decide between Radeon HD 8790M and Radeon X1800 XT. We've got no test results to judge.

Be aware that Radeon HD 8790M is a notebook card while Radeon X1800 XT is a desktop 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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AMD Radeon HD 8790M
Radeon HD 8790M
ATI Radeon X1800 XT
Radeon X1800 XT

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Community ratings

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3.3 337 votes

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3.8 12 votes

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Questions & comments

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