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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 6450 Sapphire OC 512MB Edition GeForce 6800 Ultra
Red Dead Redemption 2 1648% 2157%
Halo: Reach 456% 617%
Cyberpunk 2077 2302% 3001%
Call of Duty: Modern Warfare 1648% 2157%
Doom Eternal 1403% 1841%
Microsoft Flight Simulator 2302% 3001%
Grand Theft Auto VI 2572% 3349%
Dragon Ball Z Kakarot 978% 1292%
Star Wars: Jedi - Fallen Order 2302% 3001%
Need For Speed Heat 1648% 2157%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 6450 Sapphire OC 512MB Edition are noticeably better than the Nvidia GeForce 6800 Ultra.

The HD 6450 was released over three years more recently than the GeForce 6800 Ultra, and so the HD 6450 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce 6800 Ultra when running the latest games.

The HD 6450 has 256 MB more video memory than the GeForce 6800 Ultra, so is likely to be slightly better at displaying game textures at higher resolutions. This is supported by the fact that the HD 6450 also has superior memory performance overall.

The GeForce 6800 Ultra has 9.6 GB/sec greater memory bandwidth than the HD 6450, which means that the memory performance of the GeForce 6800 Ultra is marginally better than the HD 6450.

The Radeon HD 6450 Sapphire OC 512MB Edition has 160 Shader Processing Units and the GeForce 6800 Ultra has 22. However, the actual shader performance of the HD 6450 is 60 and the actual shader performance of the GeForce 6800 Ultra is 9. The HD 6450 having 51 better shader performance is not particularly notable, as altogether the GeForce 6800 Ultra performs better when taking into account other relevant data.

The Radeon HD 6450 Sapphire OC 512MB Edition requires 18 Watts to run and the GeForce 6800 Ultra requires 124 Watts. We would recommend a PSU with at least 300 Watts for the HD 6450. The GeForce 6800 Ultra requires 106 Watts more than the HD 6450 to run. The difference is significant enough that the GeForce 6800 Ultra may have an adverse affect on your yearly electricity bills in comparison to the HD 6450.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed750 MHzvs400 MHz
Boost Clock-vs-
ArchitectureTerascale 2 Caicos PRONV40/NV45
OC Potential Poor vs -
Driver Support Poor vs -
Release Date07 Apr 2011vs01 Mar 2005
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - green tick vs green tick -
green tick vs -
green tick vs -
green tick vs -
3840x2160 - green tick vs green tick -

GPU Memory

Memory512 MBvs256 MB
Memory Speed800 MHzvs550 MHz
Memory Bus64 Bitvs256 Bit
Memory TypeGDDR5vsGDDR3
Memory Bandwidth25.6GB/secvs35.2GB/sec
L2 Cache 128 KB green tick vs -
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units160vs22
Actual Shader Performance3%vs0%
Texture Mapping Units8vs-
Texture Rate6 GTexel/svs-
Render Output Units4vs-
Pixel Rate3 GPixel/svs-

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs2560x1600
VGA Connections1vs0
DVI Connections1vs2
HDMI Connections0vs0
DisplayPort Connections-vs-

GPU Power Requirements

Max Power18 Wattsvs124 Watts
Recommended PSU300 Watts & 22 Amps-

GPU Features

Shader Model5.0vs3.0
Open GL4.3vs1.5
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Celeron G440 1.6GHz-
Recommended RAM4 GB-
Maximum Recommended Gaming Resolution1366x768-

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
Radeon HD 6450 Sapphire OC 512MB Edition is a special edition of AMD's Entry-Level Radeon HD 6450, created by Sapphire.

Overclock: Central Unit
The Central Unit now runs at 750MHz, instead of 625MHz.

Overclock: Memory Clock
The Operating Memory Clock and the Frame Buffer both remain the same.

Cooling Solution
The Cooling System remains the same.

Benchmarks indicate a 11% performance over the reference Radeon HD 6450.
The groundbreaking new NVIDIA GeForce 6800 graphics processing units (GPUs) and their revolutionary technologies power worlds where reality and fantasy meet; worlds in which new standards are set for visual realism and quality, performance, and video functionality. The GeForce 6800 GPUs deliver powerful, elegant graphics to drench your senses, immersing you in unparalleled worlds of visual effects for the ultimate PC experience.
Recommended CPU
Possible GPU Upgrades
GPU Variants