GeForce GT 640 OEM vs ATI Radeon HD 4870

Place in the ranking	720	935
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.31	no data
Power efficiency	1.64	2.33
Architecture	TeraScale (2005−2013)	Kepler (2012−2018)
GPU code name	RV770	GK107
Market segment	Desktop	Desktop
Release date	25 June 2008 (16 years ago)	24 April 2012 (12 years ago)
Launch price (MSRP)	$299	no data

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	800	384
Core clock speed	750 MHz	797 MHz
Number of transistors	956 million	1,270 million
Manufacturing process technology	55 nm	28 nm
Power consumption (TDP)	150 Watt	50 Watt
Texture fill rate	30.00	25.50
Floating-point processing power	1.2 TFLOPS	0.6121 TFLOPS
ROPs	16	16
TMUs	40	32

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 2.0 x16	PCIe 3.0 x16
Length	250 mm	145 mm
Width	2-slot	1-slot
Supplementary power connectors	2x 6-pin	None

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	DDR3
Maximum RAM amount	1 GB	2 GB
Memory bus width	256 Bit	128 Bit
Memory clock speed	900 MHz	891 MHz
Memory bandwidth	115.2 GB/s	28.51 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	2x DVI, 1x S-Video	1x DVI, 1x HDMI, 1x DisplayPort
HDMI	-	+

API compatibility

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

DirectX	10.1 (10_1)	12 (11_0)
Shader Model	4.1	5.1
OpenGL	3.3	4.6
OpenCL	1.1	1.2
Vulkan	N/A	1.1.126
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	3.58	1.70
Recency	25 June 2008	24 April 2012
Maximum RAM amount	1 GB	2 GB
Chip lithography	55 nm	28 nm
Power consumption (TDP)	150 Watt	50 Watt

ATI HD 4870 has a 110.6% higher aggregate performance score.

GT 640 OEM, on the other hand, has an age advantage of 3 years, a 100% higher maximum VRAM amount, a 96.4% more advanced lithography process, and 200% lower power consumption.

The Radeon HD 4870 is our recommended choice as it beats the GeForce GT 640 OEM in performance tests.

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