Radeon HD 6990 vs HD 7990

Place in performance ranking	333	486
Place by popularity	not in top-100	not in top-100
Cost-Effectiveness Evaluation	1.64	1.57
Architecture	GCN 1.0 (2012−2020)	TeraScale 3 (2010−2013)
GPU code name	Malta	Antilles
Market segment	Desktop	Desktop
Release date	24 April 2013 (11 years ago)	8 March 2011 (13 years ago)
Launch price (MSRP)	$999	$699
Current price	$486 (0.5x MSRP)	$144 (0.2x MSRP)

Cost-Effectiveness Evaluation

Performance to price ratio. The higher, the better.

HD 7990 has 4% better value for money than HD 6990.

Detailed Specifications

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	2048	1536
Core clock speed	950 MHz	830 MHz
Boost clock speed	1000 MHz	no data
Number of transistors	4,313 million	2,640 million
Manufacturing process technology	28 nm	40 nm
Power consumption (TDP)	375 Watt	375 Watt
Texture fill rate	128.0	79.68
Floating-point performance	2x 4,096 gflops	2x 2,549.8 gflops

Form Factor & Compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Interface	PCIe 3.0 x16	PCIe 2.0 x16
Length	307 mm	295 mm
Width	2-slot	2-slot
Supplementary power connectors	2x 8-pin	2x 8-pin

Memory type	GDDR5	GDDR5
Maximum RAM amount	3 GB	2 GB
Memory bus width	384 Bit	256 Bit
Memory clock speed	6000 MHz	5000 MHz
Memory bandwidth	288.0 GB/s	160.0 GB/s

Connectivity and Outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors

1x DVI, 4x mini-DisplayPort

API Compatibility

List of supported graphics and general-purpose computing APIs, including their specific versions.

DirectX	12 (11_1)	11.2 (11_0)
Shader Model	5.1	5.0
OpenGL	4.6	4.4
OpenCL	1.2	1.2
Vulkan	1.2.131	N/A

Synthetic benchmark performance

Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

HD 7990 14.38
+84.8%

HD 6990 7.78

HD 7990 outperforms HD 6990 by 85% based on our aggregated benchmark results.

Passmark

This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

Benchmark coverage: 25%

HD 7990 5565
+84.7%

HD 6990 3013

HD 7990 outperforms HD 6990 by 85% in Passmark.

3DMark Fire Strike Graphics

Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.

Benchmark coverage: 14%

HD 7990 15540
+167%

HD 6990 5830

HD 7990 outperforms HD 6990 by 167% in 3DMark Fire Strike Graphics.