T400 4 GB vs Radeon HD 6850 X2

Place in the ranking	568	458
Place by popularity	not in top-100	not in top-100
Power efficiency	1.77	22.40
Architecture	TeraScale 2 (2009−2015)	Turing (2018−2022)
GPU code name	Barts	TU117
Market segment	Desktop	Workstation
Release date	19 September 2011 (13 years ago)	6 May 2021 (3 years ago)

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	960	384
Core clock speed	800 MHz	420 MHz
Boost clock speed	no data	1425 MHz
Number of transistors	1,700 million	4,700 million
Manufacturing process technology	40 nm	12 nm
Power consumption (TDP)	254 Watt	30 Watt
Texture fill rate	38.40	34.20
Floating-point processing power	1.536 TFLOPS	1.094 TFLOPS
ROPs	32	16
TMUs	48	24

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
Width	2-slot	1-slot
Supplementary power connectors	2x 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	GDDR6
Maximum RAM amount	2 GB	4 GB
Memory bus width	256 Bit	64 Bit
Memory clock speed	1050 MHz	1250 MHz
Memory bandwidth	134.4 GB/s	80 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 HDMI, 1x DisplayPort	3x mini-DisplayPort
HDMI	+	-

API compatibility

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

DirectX	11.2 (11_0)	12 (12_1)
Shader Model	5.0	6.6
OpenGL	4.4	4.6
OpenCL	1.2	3.0
Vulkan	N/A	1.2
CUDA	-	7.5

Synthetic benchmark performance

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

Combined synthetic benchmark score

This is our combined benchmark 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 6850 X2 6.58

T400 4 GB 9.81
+49.1%

Passmark

This is the most ubiquitous GPU benchmark. 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.

HD 6850 X2 2534

T400 4 GB 3781
+49.2%

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	6.58	9.81
Recency	19 September 2011	6 May 2021
Maximum RAM amount	2 GB	4 GB
Chip lithography	40 nm	12 nm
Power consumption (TDP)	254 Watt	30 Watt

T400 4 GB has a 49.1% higher aggregate performance score, an age advantage of 9 years, a 100% higher maximum VRAM amount, a 233.3% more advanced lithography process, and 746.7% lower power consumption.

The T400 4 GB is our recommended choice as it beats the Radeon HD 6850 X2 in performance tests.

Be aware that Radeon HD 6850 X2 is a desktop card while T400 4 GB is a workstation one.

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