Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 6950 Crossfire Radeon HD 7950 Vapor-X OC Edition
Star Wars: Battlefront 39% 48%
Fallout 4 32% 40%
Assassins Creed: Syndicate 32% 40%
FIFA 16 52% 48%
Call of Duty: Black Ops 3 14% 8%
Metal Gear Solid V: The Phantom Pain 9% 3%
Pro Evolution Soccer 2016 97% 97%
NBA 2K16 42% 39%
Batman: Arkham Knight 48% 58%
Mad Max 9% 3%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 6950 Crossfire are very slightly better than the AMD Radeon HD 7950 Vapor-X OC Edition.

The HD 7950 has a 100 MHz higher core clock speed than the HD 6950, but the HD 6950 has 64 more Texture Mapping Units than the HD 7950. As a result, the HD 6950 exhibits a 40 GTexel/s better Texture Fill Rate than the HD 7950. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The HD 7950 has a 100 MHz higher core clock speed than the HD 6950, but the HD 6950 has 32 more Render Output Units than the HD 7950. As a result, the HD 6950 exhibits a 22.4 GPixel/s better Pixel Fill Rate than the HD 7950. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The HD 7950 was released over a year more recently than the HD 6950, and so the HD 7950 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the HD 6950.

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 6950 has 1024 MB more video memory than the HD 7950, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the HD 6950 also has superior memory performance overall.

The HD 6950 has 80 GB/sec greater memory bandwidth than the HD 7950, which means that the memory performance of the HD 6950 is much better than the HD 7950.

The Radeon HD 6950 Crossfire has 2016 Shader Processing Units and the Radeon HD 7950 Vapor-X OC Edition has 1792. However, the actual shader performance of the HD 6950 is 1048 and the actual shader performance of the HD 7950 is 1371. The HD 7950 having 323 better shader performance is not particularly notable, as altogether the HD 6950 performs better when taking into account other relevant data.

The HD 7950 transistor size technology is 12 nm (nanometers) smaller than the HD 6950. This means that the HD 7950 is expected to run slightly cooler and achieve higher clock frequencies than the HD 6950.

The Radeon HD 6950 Crossfire requires 400 Watts to run but there is no entry for the Radeon HD 7950 Vapor-X OC Edition. We would recommend a PSU with at least 500 Watts for the HD 7950, but we do not have a recommended PSU wattage for the HD 6950.

Can I Run It

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GPU Architecture

Core Speed800 MHzvs900 MHz
Boost Clock-vs-
ArchitectureCayman Pro GCN 1.0 Tahiti PRO
OC Potential Poor vs Poor
Driver Support - vs Good
Release Date01 Oct 2010vs01 Aug 2012
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - green tick vs green tick -
1600x900 - vs green tick
green tick vs
2560x1440 - vs green tick
3840x2160 - vs green tick

GPU Memory

Memory4096 MBvs3072 MB
Memory Speed1250 MHzvs1250 MHz
Memory Bus512 Bitvs384 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth320GB/secvs240GB/sec
L2 Cache - vs green tick 768 KB
Delta Color Compression no vs no
Memory Performance 100% green tick vs 83%

GPU Display

Shader Processing Units2016vs1792
Actual Shader Performance50%vs66%
Texture Mapping Units176vs112
Texture Rate140.8 GTexel/svs100.8 GTexel/s
Render Output Units64vs32
Pixel Rate51.2 GPixel/svs28.8 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs0
DVI Connections0vs2
HDMI Connections0vs1
DisplayPort Connections-vs-

GPU Power Requirements

Max Power400 Watts-
Recommended PSU-500 Watts

GPU Features

Shader Model5.0vs5.0
Open GL4.2vs4.4
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-960 Quad 3.2GHzvsIntel Core i5-3570K 3.4GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon HD 6950 Crossfire is a solution of two Radeon HD 6950 put together using AMD'S Crossfire technology.
Check the page of Radeon HD 6950 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 up to x% better than a single Radeon HD 6950 performing by itself it might be worse (depending on whether or not the 3D game supports crossfire or in the graphics driver) than a single Radeon HD 6950. Expect this combination to draw up to 400 Watt though the average power consumption should be slightly lower.
Even the most demanding games will run at the highest settings.
Radeon HD 7950 Vapor-X OC Edition is a special edition of the Radeon HD 7950. See the standard's version page to know more about it.
The new features include a core-clock raise from 800MHz to 850MHz (900MHz in Turbo Boost) which can be of 950MHz in "lethal mode" (via BIOS). A new cooling system called Vapor-X was installed which should keep Radeon HD 7950's temperatures low under extreme loading.
The performance boost is around 4% and 7% when compared to standard Radeon HD 7950 in normal and lethal modes, respectively.
Recommended CPUAMD Phenom II X6 1035T
AMD FX-8100
Intel Core i5-4570T 2.9GHz
Intel Core i3-4370 3.8GHz
AMD Phenom II X4 980
Intel Core i7-4785T 4-Core 2.2GHz
Intel Xeon E5-2407 v2
Intel Core i5-4570 3.2GHz
Intel Core i5-4670S 3.1GHz
Intel Xeon Processor W3670
Possible GPU UpgradesGeForce GTX 770 Galaxy GC 2GB Edition
Radeon R9 280X Sapphire Toxic 3GB OC Edition
Radeon R9 280X XFX Double D Black Edition
Radeon R9 280X Matrix Platinum 3GB Edition
Radeon R9 280X DirectCU II TOP 3GB Edition
Radeon R9 390 Sapphire Nitro w/ Back Plate 8GB Edition
Radeon R9 390 Asus DirectCU III OC Strix Gaming 8GB Edition
Radeon R9 290X PowerColor PCS+ 4GB Edition
Radeon R9 290X Asus ROG Matrix Platinum Edition
Radeon R9 290X Asus DirectCU II OC Edition
GPU Variants--