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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7850 XFX Ultra OC Edition Radeon HD 3870 X2
Cyberpunk 2077 154% 631%
Assassins Creed: Valhalla 133% 569%
Call of Duty: Black Ops Cold War 125% 547%
Grand Theft Auto VI 258% 929%
FIFA 21 28% 269%
Genshin Impact 154% 631%
Far Cry 6 268% 958%
Hitman 3 231% 851%
Watch Dogs Legion 145% 606%
World of Warcraft: Shadowlands 265% 949%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7850 XFX Ultra OC Edition are massively better than the AMD Radeon HD 3870 X2.

The HD 7850 has a 150 MHz higher core clock speed and 48 more Texture Mapping Units than the HD 3870. This results in the HD 7850 providing 49.2 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The HD 7850 has a 150 MHz higher core clock speed and 16 more Render Output Units than the HD 3870. This results in the HD 7850 providing 18 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The HD 7850 was released over three years more recently than the HD 3870, and so the HD 7850 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the HD 3870 when running the latest games.

The Radeon HD 7850 XFX Ultra OC Edition and the Radeon HD 3870 X2 have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The HD 7850 has 96 GB/sec greater memory bandwidth than the HD 3870, which means that the memory performance of the HD 7850 is massively better than the HD 3870.

The Radeon HD 7850 XFX Ultra OC Edition has 1024 Shader Processing Units and the Radeon HD 3870 X2 has 640. However, the actual shader performance of the HD 7850 is 849 and the actual shader performance of the HD 3870 is 528. The HD 7850 having 321 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7850 delivers a massively smoother and more efficient experience when processing graphical data than the HD 3870.

The HD 7850 transistor size technology is 27 nm (nanometers) smaller than the HD 3870. This means that the HD 7850 is expected to run slightly cooler and achieve higher clock frequencies than the HD 3870.

The Radeon HD 3870 X2 requires 165 Watts to run but there is no entry for the HD 7850. We would recommend a PSU with at least 500 Watts for the HD 7850 and a PSU with at least 550 Watts for the HD 3870. The HD 3870 has been recommended a PSU with 50 Watts more than the HD 7850. The difference is significant enough that the HD 3870 may have a slight adverse affect on your yearly electricity bills in comparison to the HD 7850.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed975 MHzvs825 MHz
Boost Clock-vs-
ArchitectureGCN 1.0 Pitcairn PROR600 RV670 XT
OC Potential Fair vs Poor
Driver Support Good vs Discontinued
Release Date01 Jun 2012vs28 Jan 2008
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - green tick vs green tick -
green tick vs -
green tick vs -
green tick vs -
green tick vs -

GPU Memory

Memory1024 MBvs1024 MB
Memory Speed1200 MHzvs900 MHz
Memory Bus256 Bitvs256 Bit
Memory TypeGDDR5vsGDDR4
Memory Bandwidth153.6GB/secvs57.6GB/sec
L2 Cache 512 KB green tick vs 0 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units1024vs640
Actual Shader Performance41%vs25%
Texture Mapping Units64vs16
Texture Rate62.4 GTexel/svs13.2 GTexel/s
Render Output Units32vs16
Pixel Rate31.2 GPixel/svs13.2 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections0vs0
DVI Connections2vs2
HDMI Connections1vs0
DisplayPort Connections-vs-

GPU Power Requirements

Max Power-165 Watts
Recommended PSU500 Wattsvs550 Watts & 30 Amps

GPU Features

Shader Model5.0vs4.1
Open GL4.4vs3.3
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3330 3.0GHzvsIntel Core 2 Duo E6850 3.0GHz
Recommended RAM8 GBvs4 GB
Maximum Recommended Gaming Resolution1920x1080vs1440x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon HD 7850 XFX Ultra OC Edition is a special edition of the powerful Radeon HD 7850. See the standard version for more information about it.
The differences include an increase on the core-clock that went from 860MHz to 975MHz.
Benchmarks indicate a 7% boost when compared to the standard edition.
Radeon HD 3870 X2 (not Crossfire) is a dual-graphics solution of two Radeon HD 3870.
This combination is expected to offer almost the same performance as Radeon HD 3870 Crossfired while consuming up to 25% less power. However, and just like Crossfire, its performance also relies a lot on proper driver support.
Today's modern demanding games will have to be played using the medium preset but with fluent frame rates. However, DirectX 11 games aren't supported.
Recommended CPU
Possible GPU Upgrades
GPU Variants