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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7870 PCS+ Vortex II Edition Radeon HD 4830 512MB
Cyberpunk 2077 103% 606%
Assassins Creed: Valhalla 86% 546%
Call of Duty: Black Ops Cold War 80% 525%
FIFA 21 2% 256%
Microsoft Flight Simulator 80% 525%
Watch Dogs Legion 96% 581%
World of Warcraft: Shadowlands 191% 913%
Grand Theft Auto VI 186% 894%
Genshin Impact 103% 606%
Horizon: Zero Dawn 92% 569%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7870 PCS+ Vortex II Edition are massively better than the AMD Radeon HD 4830 512MB.

The HD 7870 has a 575 MHz higher core clock speed and 48 more Texture Mapping Units than the HD 4830. This results in the HD 7870 providing 73.6 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 7870 has a 575 MHz higher core clock speed and 16 more Render Output Units than the HD 4830. This results in the HD 7870 providing 27.6 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 7870 was released over three years more recently than the HD 4830, and so the HD 7870 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the HD 4830 when running the latest games.

The HD 7870 has 1536 MB more video memory than the HD 4830, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the HD 7870 also has superior memory performance overall.

The HD 7870 has 102.4 GB/sec greater memory bandwidth than the HD 4830, which means that the memory performance of the HD 7870 is massively better than the HD 4830.

The Radeon HD 7870 PCS+ Vortex II Edition has 1280 Shader Processing Units and the Radeon HD 4830 512MB has 640. However, the actual shader performance of the HD 7870 is 1251 and the actual shader performance of the HD 4830 is 258. The HD 7870 having 993 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7870 delivers a massively smoother and more efficient experience when processing graphical data than the HD 4830.

The HD 7870 transistor size technology is 27 nm (nanometers) smaller than the HD 4830. This means that the HD 7870 is expected to run slightly cooler and achieve higher clock frequencies than the HD 4830.

The Radeon HD 4830 512MB requires 95 Watts to run but there is no entry for the HD 7870. We would recommend a PSU with at least 500 Watts for the HD 7870 and a PSU with at least 450 Watts for the HD 4830. The HD 7870 has been recommended a PSU with 50 Watts more than the HD 4830. The difference is significant enough that the HD 7870 may have a slight adverse affect on your yearly electricity bills in comparison to the HD 4830.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1150 MHzvs575 MHz
Boost Clock-vs-
ArchitectureGCN 1.0 Pitcairn XTR700 RV790 LE
OC Potential Poor vs Fair
Driver Support Good vs Poor
Release Date01 Sep 2012vs21 Oct 2008
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
9.5
green tick vs
5.1
1920x1080
7.5
green tick vs
3.7
2560x1440
5.5
green tick vs
2.5
3840x2160
3.9
green tick vs
1.7

GPU Memory

Memory2048 MBvs512 MB
Memory Speed1250 MHzvs900 MHz
Memory Bus256 Bitvs256 Bit
Memory TypeGDDR5vsGDDR3
Memory Bandwidth160GB/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%
Comparison

GPU Display

Shader Processing Units1280vs640
Actual Shader Performance60%vs12%
Technology28nmvs55nm
Texture Mapping Units80vs32
Texture Rate92 GTexel/svs18.4 GTexel/s
Render Output Units32vs16
Pixel Rate36.8 GPixel/svs9.2 GPixel/s
Comparison

GPU Outputs

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

GPU Power Requirements

Max Power-95 Watts
Recommended PSU500 Wattsvs450 Watts & 33 Amps

GPU Features

DirectX12.0vs10.1
Shader Model5.0vs4.1
Open GL4.4vs3.3
Open CL-vs-
Notebook GPUnono
SLI/Crossfireyesvsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3570K 3.4GHzvsIntel Core 2 Duo E8400 3.0GHz
Recommended RAM8 GBvs4 GB
Maximum Recommended Gaming Resolution1920x1080vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon HD 7870 PCS+ Vortex II Edition is a special edition of Radeon HD 7870.
This is one of today's most powerful editions of the reference as it features increases in both the core and memory clocks that went from 1000MHz to 1150MHz and from 1200MHz to 1250MHz.
Benchmarks indicate the performance boost is quite extreme and around 8% when compared to the reference Radeon HD 7870.
Radeon HD 4830 is a high-end GPU based on the 55nm, third unified shader architecture, R700.
It's based on the RV790 LE Core (related to Radeon HD 4860) and offers 640 Shader Processing Units, 32 TMUs and 16 ROPs a 256-bit memory interface of standard GDDR3. The central unit runs at 575MHz and the memory clock runs at up to 900MHz.
It performs much worse when compared to Radeon HD 4850/Radeon HD 4870 due to being paired with standard GDDR3, featuring less Shading Units & TMUs and being relatively underclocked. However, it's expected to consume only up to 95 Watt.
Some of today's modern games should run fluently at high settings but with modest resolutions. DirectX 11 games aren't supported.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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