ATI Radeon X850 PRO vs GeForce GTX 660M Mac Edition

Place in the ranking	968	1395
Place by popularity	not in top-100	not in top-100
Power efficiency	2.14	no data
Architecture	Kepler (2012−2018)	R400 (2004−2008)
GPU code name	GK107	R480
Market segment	Laptop	Desktop
Release date	1 April 2013 (11 years ago)	1 December 2004 (20 years ago)
Launch price (MSRP)	no data	$279

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	384	no data
Core clock speed	950 MHz	507 MHz
Number of transistors	1,270 million	160 million
Manufacturing process technology	28 nm	130 nm
Power consumption (TDP)	50 Watt	no data
Texture fill rate	30.40	6.084
Floating-point processing power	0.7296 TFLOPS	no data
ROPs	16	12
TMUs	32	12

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	MXM-B (3.0)	PCIe 1.0 x16
Width	no data	1-slot
Supplementary power connectors	None	1x 6-pin

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory type	GDDR5	GDDR3
Maximum RAM amount	512 MB	256 MB
Memory bus width	128 Bit	256 Bit
Memory clock speed	1250 MHz	520 MHz
Memory bandwidth	80 GB/s	33.28 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

No outputs

1x DVI, 1x VGA, 1x S-Video

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	12 (11_0)	9.0b (9_2)
Shader Model	5.1	no data
OpenGL	4.6	2.0
OpenCL	1.2	N/A
Vulkan	1.1.126	N/A
CUDA	3.0	-

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Pros & cons summary

Performance score	1.56	0.19
Recency	1 April 2013	1 December 2004
Maximum RAM amount	512 MB	256 MB
Chip lithography	28 nm	130 nm

GTX 660M Mac Edition has a 721.1% higher aggregate performance score, an age advantage of 8 years, a 100% higher maximum VRAM amount, and a 364.3% more advanced lithography process.

The GeForce GTX 660M Mac Edition is our recommended choice as it beats the Radeon X850 PRO in performance tests.

Be aware that GeForce GTX 660M Mac Edition is a notebook card while Radeon X850 PRO is a desktop one.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.