Now Reading
Sapphire HD7770 GHz Edition Vapor-X Review

Sapphire HD7770 GHz Edition Vapor-X Review

by Sam ChenMay 18, 2012

Meet the New Vapor-X

AMD undoubtedly earned its place again in the history of computer graphics when they introduced the first graphics card with a 28nm GPU, the HD7970, in December of last year. Engineered with AMD’s ground breaking GCN (Graphics Core Next) Architecture, it brought features such as PCIe 3.0, advanced power management, Eyefinity 2.0, and most importantly, unparalleled performance.

Of course, as expected of cutting edge, high end computer hardware, you’ll have to expect to pay a premium. A reference design 7970 these days will set you back $550, which isn’t exactly chump change. So what about the people who don’t need all the muscle or simply don’t have the dough, but still want access to some of the features the new silicone brings? This is where the 7700 series comes in.

Code named Cape Verde XT, the 7700 series was designed for lower powered PCs but still retains the features of the GCN. Manufactured using the same 28nm manufacturing process used for the 7900 series, the 7700 series is designed to be a more budget friendly line of graphics cards yet still powerful enough to suit the needs of most casual gamers. For more information about the AMD HD 7700 series, check out our review of the HIS HD7750 iCooler graphics card.

HD7750 HD7770
Fabrication 28nm 28nm
Transistor Count 1.5 Billion 1.5Billion
Core Clock 800MHz 1000MHz
Stream Processors 512 640
Texture Units 40 40
ROPs 16 16
Buffer Size 1GB GDDR5 1GB GDDR5
Memory Interface 128-bit 128-bit
Memory Bandwidth 72GB/s 83.2GB/s
Memory Frequency 1.15GHz(4.5 GHz Effective) 1.15GHz(4.5 GHz Effective)

Today we’ll be taking a look at the Sapphire HD 7770 GHz Edition Vapor-X graphics card. Aside from being overclocked 10% higher than the reference design, this card also comes with the Vapor-X cooler. Ever since its introduction a couple years back, Sapphire has been hard at work refining the Vapor-X to perfection. The Vapor-X cooler we’ll be looking at today is the newest iteration which should provide even better performance.


Model Name Sapphire HD 7770 GHz Edition Vapor-X
Chipset Radeon HD 7770 PCIe Series
ASIC RadeonTM HD 7770 GPU
Manu. Process (Micron) 28nm
Memory Size (MB) 1024MB
Memory Type GDDR5
Engine CLK (MHz) 1100MHz
Memory CLK (Gbps) 4.5Gbps
Memory Interface (bit) 128bit
Power Supply Requirement 400 Watt or greater power 
Bus Interface PCI Express 3.0 x16
Display Port 1xDisplay Port 1.2
HDMI 1xHDMI 1.4a
DVI 1xDual Link DVI1xSingle Link DVI
About The Author
Sam Chen
Hardware and Technology Enthusiast. SSD Evangelist. Editor-in-Chief. You can find Sam's full biography here