Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 6870 Sapphire Dirt3 Edition Radeon HD 7770 Sapphire GHz OC Edition
Red Dead Redemption 2 186% 260%
Call of Duty: Modern Warfare 186% 260%
Cyberpunk 2077 293% 395%
Zombieland: Double Tap - Road Trip 168% 237%
Borderlands 3 202% 280%
FIFA 20 53% 92%
Microsoft Flight Simulator 293% 395%
Ghost Recon Breakpoint 334% 445%
eFootball PES 2020 95% 146%
The Outer Worlds 162% 230%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 6870 Sapphire Dirt3 Edition are noticeably better than the AMD Radeon HD 7770 Sapphire GHz OC Edition.

The HD 7770 has a 230 MHz higher core clock speed than the HD 6870, but the HD 6870 has 16 more Texture Mapping Units than the HD 7770. As a result, the HD 6870 exhibits a 5.5 GTexel/s better Texture Fill Rate than the HD 7770. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The HD 7770 has a 230 MHz higher core clock speed than the HD 6870, but the HD 6870 has 16 more Render Output Units than the HD 7770. As a result, the HD 6870 exhibits a 11 GPixel/s better Pixel Fill Rate than the HD 7770. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The HD 7770 was released over a year more recently than the HD 6870, and so the HD 7770 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the HD 6870.

The Radeon HD 6870 Sapphire Dirt3 Edition and the Radeon HD 7770 Sapphire GHz OC Edition have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The HD 6870 has 54.4 GB/sec greater memory bandwidth than the HD 7770, which means that the memory performance of the HD 6870 is much better than the HD 7770.

The Radeon HD 6870 Sapphire Dirt3 Edition has 1120 Shader Processing Units and the Radeon HD 7770 Sapphire GHz OC Edition has 640. However, the actual shader performance of the HD 6870 is 515 and the actual shader performance of the HD 7770 is 626. The HD 7770 having 111 better shader performance is not particularly notable, as altogether the HD 6870 performs better when taking into account other relevant data.

The HD 7770 transistor size technology is 12 nm (nanometers) smaller than the HD 6870. This means that the HD 7770 is expected to run slightly cooler and achieve higher clock frequencies than the HD 6870.

The Radeon HD 6870 Sapphire Dirt3 Edition requires 251 Watts to run and the Radeon HD 7770 Sapphire GHz OC Edition requires 80 Watts. We would recommend a PSU with at least 500 Watts for the HD 6870 and a PSU with at least 450 Watts for the HD 7770. The HD 6870 requires 171 Watts more than the HD 7770 to run. The difference is significant enough that the HD 6870 may have an adverse affect on your yearly electricity bills in comparison to the HD 7770.

GPU Architecture

Core Speed920 MHzvs1150 MHz
Boost Clock-vs-
ArchitectureTerascale 2 Barts XTGCN 1.0 Cape Verde XT
OC Potential Poor vs Poor
Driver Support Poor vs Good
Release Date01 Oct 2010vs16 Feb 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
8
green tick vs
7.1
1920x1080
6.1
green tick vs
5.4
2560x1440
4.3
green tick vs
3.8
3840x2160 - vs green tick
2.4

GPU Memory

Memory1024 MBvs1024 MB
Memory Speed1050 MHzvs1250 MHz
Memory Bus256 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth134.4GB/secvs80GB/sec
L2 Cache 512 KB green tick vs green tick 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units1120vs640
Actual Shader Performance25%vs30%
Technology40nmvs28nm
Texture Mapping Units56vs40
Texture Rate51.5 GTexel/svs46 GTexel/s
Render Output Units32vs16
Pixel Rate29.4 GPixel/svs18.4 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs0
DVI Connections2vs1
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power251 Wattsvs80 Watts
Recommended PSU500 Wattsvs450 Watts

GPU Features

DirectX11.0vs12.0
Shader Model5.0vs5.0
Open GL4.3vs4.4
Open CL-vs-
Notebook GPUnono
SLI/Crossfireyesvsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-760 2.8GHzvsIntel Core i3-3240 3.4GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon HD 6870 Sapphire Dirt3 Edition is a special edition of the high-end Radeon HD 6870 that features a small increase in the core-clock and a new cooling system called WindForce 3X.
The GPU runs cooler but the performance boost is of only 1% according to most benchmarks.
Radeon HD 7770 Sapphire GHz OC Edition is a special edition of the fast-middle-class Radeon HD 7770. See the standard version for more information about it.
The differences include increased memory and core clocks, from 1125MHz to 1250MHz and from 1000MHz to 1150MHz, respectively. A new quiet and efficient cooling system is also available.
Benchmarks indicate a 9,5% performance boost when compared to the standard Radeon HD 7770.
Benchmarks indicate that the most demanding games (e.g. Metro 2033) will run at the highest settings but not at extreme resolutions (due to the limited memory size).
Recommended CPU
Possible GPU Upgrades
GPU Variants
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