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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7770M 2GB GeForce GTX 675M SLI
Halo: Reach 119% 37%
Cyberpunk 2077 848% 172%
Red Dead Redemption 2 590% 98%
Dragon Ball Z Kakarot 326% 22%
Call of Duty: Modern Warfare 590% 98%
Doom Eternal 494% 70%
Microsoft Flight Simulator 848% 172%
Grand Theft Auto VI 955% 203%
FIFA 20 268% 6%
Need For Speed Heat 590% 98%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 675M SLI are massively better than the AMD Radeon HD 7770M 2GB.

The HD 7770M has a 55 MHz higher core clock speed than the GTX 675M, but the GTX 675M has 96 more Texture Mapping Units than the HD 7770M. As a result, the GTX 675M exhibits a 57.8 GTexel/s better Texture Fill Rate than the HD 7770M. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The HD 7770M has a 55 MHz higher core clock speed than the GTX 675M, but the GTX 675M has 48 more Render Output Units than the HD 7770M. As a result, the GTX 675M exhibits a 28.9 GPixel/s better Pixel Fill Rate than the HD 7770M. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The HD 7770M was released less than a year after the GTX 675M, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The GTX 675M has 2048 MB more video memory than the HD 7770M, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GTX 675M also has superior memory performance overall.

The GTX 675M has 128 GB/sec greater memory bandwidth than the HD 7770M, which means that the memory performance of the GTX 675M is massively better than the HD 7770M.

The Radeon HD 7770M 2GB has 512 Shader Processing Units and the GeForce GTX 675M SLI has 768. However, the actual shader performance of the HD 7770M is 294 and the actual shader performance of the GTX 675M is 952. The GTX 675M having 658 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 675M delivers a massively smoother and more efficient experience when processing graphical data than the HD 7770M.

The HD 7770M transistor size technology is 12 nm (nanometers) smaller than the GTX 675M. This means that the HD 7770M is expected to run slightly cooler and achieve higher clock frequencies than the GTX 675M.

The Radeon HD 7770M 2GB requires 32 Watts to run and the GeForce GTX 675M SLI requires 200 Watts. The GTX 675M requires 168 Watts more than the HD 7770M to run. The difference is significant enough that the GTX 675M may have an adverse affect on your yearly electricity bills in comparison to the HD 7770M.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed675 MHzvs620 MHz
Boost Clock-vs-
ArchitectureGCN 1.0 Chelsea XTFermi GF114 (x2)
OC Potential Fair vs None
Driver Support Good vs -
Release Date24 Apr 2012vs22 Mar 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
6.5
green tick vs -
1600x900
5.1
vs green tick
9.3
1920x1080
3.6
vs green tick
7.3
2560x1440
2.5
vs green tick
5.3
3840x2160
1.7
green tick vs -

GPU Memory

Memory2048 MBvs4096 MB
Memory Speed1000 MHzvs750 MHz
Memory Bus128 Bitvs512 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth64GB/secvs192GB/sec
L2 Cache 256 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 Units512vs768
Actual Shader Performance14%vs46%
Technology28nmvs40nm
Texture Mapping Units32vs128
Texture Rate21.6 GTexel/svs79.4 GTexel/s
Render Output Units16vs64
Pixel Rate10.8 GPixel/svs39.7 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs2560x1600
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power32 Wattsvs200 Watts
Recommended PSU--

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3210M 2.5GHzvsIntel Core i7-3610QM 4-Core 2.3GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1600x900vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
Radeon HD 7770M 2GB is a Fast-Middle-Class Mobile Graphics Card based on the First revision of the GCN Architecture.

Architecture
The GCN Architecture succeeds the 40nm Terascale Architecture. In addition to being produced with a 28nm Technology, the GCN Architecture adds other Technologies that allow for energy efficiency. For example, ZeroCore Power, a long idle power saving technology, allows the Graphics Cards to shut down by itself when the Monitor is turned off.
GCN also adds Improved Anisotropic Filtering, DirectX 11 Tessellation and the Partially Resident Textures (PRT) Technology, which enables future games to utilize ultra-high resolution textures with the same performance as today's small and often repetitive textures.

GPU
It equips a GPU codenamed Chelsea XT which has 8 Compute Units activated and thus offers 512 Shader Processing Units, 32 TMUs and 16 ROPs. The Central Unit Operates at 675MHz.

Memory
The GPU accesses a 2GB frame buffer of fast GDDR5, through a 128-bit memory interface. The size of the frame buffer is exaggerated and in no way benefits the GPU. The memory clock operates at 1000MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for Crossfire, PowerTune Technology, Eyefinity, App Acceleration, HD3D, ZeroCore Power and other technologies.

Power Consumption
With a rated board TDP of 32W, it is suited for 15" or larger laptops.

Performance
Gaming benchmarks put its on average with NVIDIA's GeForce GT 650M.

System Suggestions
We recommend a Decent Processor (Intel Core i5 Mobile) and 8GB of RAM for a system with Radeon HD 7770M 2GB.
GeForce GTX 675M SLI is a solution of two GeForce GTX 675M put together using NVIDIA'S SLI technology.
Check the page of GeForce GTX 675M to know more about its chip.
As usual, SLI relies a lot on proper driver support and may suffer from micro-stuttering in lower frame rates (below 30). Benchmarks indicate the performance is overall, about 35% better than a single GeForce GTX 675M performing by itself but at times (depending whether or not the 3D game supports SLI or in the graphics driver) it performed worse than a single GeForce GTX 675M.
Even the most demanding games will run at the highest settings.
Recommended CPU
Possible GPU Upgrades
N/A
N/A
GPU Variants
-
-

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