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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 6990 Crossfire GeForce GTX 670 PNY 2GB Edition
Red Dead Redemption 2 26% 65%
Cyberpunk 2077 73% 126%
Doom Eternal 8% 42%
Dragon Ball Z Kakarot 22% 2%
Call of Duty: Modern Warfare 26% 65%
Microsoft Flight Simulator 73% 126%
FIFA 20 33% 12%
Grand Theft Auto VI 92% 152%
Star Wars: Jedi - Fallen Order 73% 126%
Need For Speed Heat 26% 65%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 6990 Crossfire are noticeably better than the Nvidia GeForce GTX 670 PNY 2GB Edition.

The GTX 670 has a 85 MHz higher core clock speed than the HD 6990, but the HD 6990 has 272 more Texture Mapping Units than the GTX 670. As a result, the HD 6990 exhibits a 216.2 GTexel/s better Texture Fill Rate than the GTX 670. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GTX 670 has a 85 MHz higher core clock speed than the HD 6990, but the HD 6990 has 96 more Render Output Units than the GTX 670. As a result, the HD 6990 exhibits a 76.9 GPixel/s better Pixel Fill Rate than the GTX 670. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 670 was released over a year more recently than the HD 6990, and so the GTX 670 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the HD 6990.

Both GPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings.

The HD 6990 has 6144 MB more video memory than the GTX 670, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the HD 6990 also has superior memory performance overall.

The HD 6990 has 447.7 GB/sec greater memory bandwidth than the GTX 670, which means that the memory performance of the HD 6990 is massively better than the GTX 670.

The Radeon HD 6990 Crossfire has 6144 Shader Processing Units and the GeForce GTX 670 PNY 2GB Edition has 1344. However, the actual shader performance of the HD 6990 is 5100 and the actual shader performance of the GTX 670 is 1317. The HD 6990 having 3783 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 6990 delivers a massively smoother and more efficient experience when processing graphical data than the GTX 670.

The GTX 670 transistor size technology is 12 nm (nanometers) smaller than the HD 6990. This means that the GTX 670 is expected to run slightly cooler and achieve higher clock frequencies than the HD 6990.

The Radeon HD 6990 Crossfire requires 750 Watts to run and the GeForce GTX 670 PNY 2GB Edition requires 170 Watts. We would recommend a PSU with at least 1000 Watts for the HD 6990 and a PSU with at least 500 Watts for the GTX 670. The HD 6990 requires 580 Watts more than the GTX 670 to run. The difference is significant enough that the HD 6990 may have an adverse affect on your yearly electricity bills in comparison to the GTX 670.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed830 MHzvs915 MHz
Boost Clock-vs980 MHz
ArchitectureTerascale 2 Antilles (x2)Kepler GK104-325-A2
OC Potential Poor vs Good
Driver Support - vs Good
Release Date01 Mar 2011vs01 May 2012
GPU LinkGD LinkGD Link

Resolution Performance

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

GPU Memory

Memory8192 MBvs2048 MB
Memory Speed1250 MHzvs1502 MHz
Memory Bus1024 Bitvs256 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth640GB/secvs192.3GB/sec
L2 Cache 2048 KB green tick vs 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units6144vs1344
Actual Shader Performance100%vs63%
Texture Mapping Units384vs112
Texture Rate318.7 GTexel/svs102.5 GTexel/s
Render Output Units128vs32
Pixel Rate106.2 GPixel/svs29.3 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs0
DVI Connections4vs2
HDMI Connections2vs1
DisplayPort Connections-vs-

GPU Power Requirements

Max Power750 Wattsvs170 Watts
Recommended PSU1000 Wattsvs500 Watts & 30 Amps

GPU Features

Shader Model5.0vs5.0
Open GL4.1vs4.5
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-2600K 4-Core 3.40GHzvsIntel Core i5-3570K 3.4GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon HD 6990 Crossfire is a solution of two Radeon HD 6990 put together using AMD'S Crossfire technology.
Check the page of Radeon HD 6990 to know more about its chip.
Crossfire 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, is only up to 10% better than a single Radeon HD 6990 performing by itself but it might be worse (depending on whether or not the 3D game supports crossfire or in the graphics driver) than a single Radeon HD 6990. Expect this combination to draw up to 750 Watt though the average power consumption should be slightly lower.
Even the most demanding games will run at the highest settings.
GeForce GTX 670 PNY 2GB Edition is a renamed GeForce GTX 670 with no new features - not even a new cooling system. Its performance is exactly like the reference card.
Recommended CPU
Possible GPU Upgrades
GPU Variants