Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Radeon R9 280X Gigabyte 3GB OC Edition Radeon HD 7790 DirectCU II OC Edition
Red Dead Redemption 2 40% 191%
Call of Duty: Modern Warfare 40% 191%
Zombieland: Double Tap - Road Trip 30% 172%
Cyberpunk 2077 92% 300%
Microsoft Flight Simulator 92% 300%
Borderlands 3 47% 207%
The Outer Worlds 28% 167%
FIFA 20 26% 55%
Fortnite: Chapter 2 36% 33%
eFootball PES 2020 5% 99%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 280X Gigabyte 3GB OC Edition are massively better than the AMD Radeon HD 7790 DirectCU II OC Edition.

The HD 7790 has a 75 MHz higher core clock speed than the R9 280X, but the R9 280X has 72 more Texture Mapping Units than the HD 7790. As a result, the R9 280X exhibits a 67.8 GTexel/s better Texture Fill Rate than the HD 7790. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The HD 7790 has a 75 MHz higher core clock speed than the R9 280X, but the R9 280X has 16 more Render Output Units than the HD 7790. As a result, the R9 280X exhibits a 14.8 GPixel/s better Pixel Fill Rate than the HD 7790. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The R9 280X was released less than a year after the HD 7790, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The R9 280X has 2048 MB more video memory than the HD 7790, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the R9 280X also has superior memory performance overall.

The R9 280X has 185.6 GB/sec greater memory bandwidth than the HD 7790, which means that the memory performance of the R9 280X is massively better than the HD 7790.

The Radeon R9 280X Gigabyte 3GB OC Edition has 2048 Shader Processing Units and the Radeon HD 7790 DirectCU II OC Edition has 896. However, the actual shader performance of the R9 280X is 1915 and the actual shader performance of the HD 7790 is 963. The R9 280X having 952 better shader performance and an altogether better performance when taking into account other relevant data means that the R9 280X delivers a massively smoother and more efficient experience when processing graphical data than the HD 7790.

The Radeon R9 280X Gigabyte 3GB OC Edition requires 250 Watts to run but there is no entry for the Radeon HD 7790 DirectCU II OC Edition. We would recommend a PSU with at least 600 Watts for the R9 280X.

GPU Architecture

Core Speed1000 MHzvs1075 MHz
Boost Clock1100 MHzvs-
ArchitectureGCN 1.0 Tahiti XTLGCN 1.0 Bonaire XT
OC Potential Poor vs Poor
Driver Support Great vs -
Release Date09 Oct 2013vs22 Mar 2013
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
10
green tick vs
7.9
1920x1080
8.7
green tick vs
6
2560x1440
6.5
green tick vs
4.3
3840x2160
5
green tick vs
2.6

GPU Memory

Memory3072 MBvs1024 MB
Memory Speed1500 MHzvs1600 MHz
Memory Bus384 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth288GB/secvs102.4GB/sec
L2 Cache 768 KB green tick vs 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units2048vs896
Actual Shader Performance92%vs46%
Technology28nmvs28nm
Texture Mapping Units128vs56
Texture Rate128 GTexel/svs60.2 GTexel/s
Render Output Units32vs16
Pixel Rate32 GPixel/svs17.2 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections0vs0
DVI Connections1vs2
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power250 Watts-
Recommended PSU600 Watts-

GPU Features

DirectX12.0vs11.1
Shader Model5.0vs5.0
Open GL4.4vs4.2
Open CL-vs-
Notebook GPUnono
SLI/Crossfireyesvsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3570K 3.4GHzvsIntel Core i3-3250 3.5GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon R9 280X Gigabyte 3GB OC Edition is a special edition of the high-end Radeon R9 280X.
This edition comes with a custom cooling system called "WindForce", which reduces the card's temperature under load, significantly and comes overclocked out of the box in the central unit that was increased from 850MHz to 1000MHz, while the Boost clock is now of 1100MHz.
Benchmarks indicate a 5% performance boost over the standard edition and so this card offers the same performance a GeForce GTX 770 does.
Radeon HD 7790 DirectCU II OC Edition is a special edition of the performance Radeon HD 7790.
This edition comes with a cooling solution called DirectCU II, which achieves 20% lower temps and vastly quieter performance than reference with direct-contact copper heatpipes and dual fans, according to Asus. It also comes overclocked out of the box in the core-clock to 1075MHz and on the memory clock to 1600MHz, though the latter might prove useless, as this card might not benefit from extra bandwidth.
Benchmarks indicate a 5% performance boost when compared to the reference card.
Recommended CPU
Possible GPU Upgrades
-
GPU Variants
-
-

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