Radeon RX 640 OEM vs HD 7970

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking	380	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	2.45	no data
Power efficiency	3.73	no data
Architecture	GCN 1.0 (2011−2020)	GCN 4.0 (2016−2020)
GPU code name	Tahiti	Polaris 23
Market segment	Desktop	Desktop
Design	reference	no data
Release date	22 December 2011 (12 years ago)	9 April 2020 (4 years ago)
Launch price (MSRP)	$549	no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

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	2048	640
Core clock speed	no data	1295 MHz
Boost clock speed	925 MHz	no data
Number of transistors	4,313 million	2,200 million
Manufacturing process technology	28 nm	14 nm
Power consumption (TDP)	300 Watt	50 Watt
Texture fill rate	118.4	51.80
Floating-point processing power	3.789 TFLOPS	1.658 TFLOPS
ROPs	32	16
TMUs	128	40

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).

Bus support	PCIe 2.1 x16	no data
Interface	PCIe 3.0 x16	PCIe 3.0 x8
Length	274 mm	no data
Width	2-slot	1-slot
Supplementary power connectors	1x 6-pin + 1x 8-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	GDDR5
Maximum RAM amount	6 GB	4 GB
Memory bus width	384 Bit	128 Bit
Memory clock speed	1375 MHz	1500 MHz
Memory bandwidth	264 GB/s	96 GB/s
Shared memory	-	-

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, 1x HDMI, 2x mini-DisplayPort	1x DisplayPort 1.4a, 2x mini-DisplayPort 1.4a
Eyefinity	+	-
HDMI	+	-

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

CrossFire	+	-
FreeSync	+	-

API compatibility

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

DirectX	DirectX® 11	12 (12_0)
Shader Model	5.1	6.7 (6.4)
OpenGL	4.6	4.6
OpenCL	1.2	2.1
Vulkan	-	1.3

Pros & cons summary

---

Recency	22 December 2011	9 April 2020
Maximum RAM amount	6 GB	4 GB
Chip lithography	28 nm	14 nm
Power consumption (TDP)	300 Watt	50 Watt

---

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

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite graphics card.

---