PCI Express® or PCI Express 3.0-compliant motherboard with one dual-width x16 graphics slot. System Power Supply Minimum 400 W or greater system power supply with one 6-pin PCI Express supplementary power connectors. Thermal and Power Specs: Maximum GPU Temperature: 94 °C / 201 °F Graphics Card Power: 120 W Recommended System Power: 400 W.
Or PCI Express 2.0-compliant motherboard with one dual-width x16 graphics slot. For Quad SLI configuration, you need an SLI-ready motherboard with one dual-width x16 graphics slot for each graphics card.

Dual-width X16 Graphics Slot

Dual-width x16 graphics slot. SYSTEM REQUIREMENTS. Microsoft Windows 7 / 8 / 10 (32/64 bits) Required Power Supply. Additional Requirements.

Tags: June 25, 2019

How Many PCIe Lanes Do You Really Need?

With the new line of X570 motherboards coming up, PCIe 4.0 is finally within reach for the average consumer. With that in mind, it seemed like a good idea to talk about PCIe lanes. What are they exactly, and how many lanes do you really need?

First, a refresher: PCIe 3.0 is the current expansion bus standard used on most modern motherboards. It’s the hardware interface between devices (e.g., video cards, sound cards, M.2 drives, network cards) and the motherboard. The slots come in various sizes (x1, x2, x4, x8, and x16)¹, and the speed of a given slot is determined by the number of available PCIe lanes.

The total number of lanes for a slot are broken up into thesame numbers as above (1, 2, 4, 8, 16). However, to make things slightly
confusing, the number of lanes in a slot does not always match the physical slot length. Meaning, you can (and often do) encounter a x16 slot with only 8 lanes. Pro-tip: you can actually see this by looking for the shiny little contacts in the slot itself. If the contacts only go up halfway, that x16 slot only has 8 lanes.

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But 8 lanes are often plenty. Even though the theoretical data transfer limits of 8 and 16 lane slots are vastly different², there is currently no consumer card on the market capable of saturating the bandwidth of a PCIe 3.0 x16 slot. While the amount of data being “crunched” by a high-end video card is often above that limit, the majority of calculations related to the device are actually handled by the card’s internal processor, and therefore do not need to travel through the bus. Performance differences are mainly dependent on the card itself, and not the theoretical limits of the slot.

Motherboards are designed with various amounts of PCIe lanes, and different processors are designed with support for certain amounts of lanes. Server and enthusiast boards are typically designed with more lanes to provide more expandability, and CPU manufacturers segment their products similarly. For example, the Intel Core i7-9700K supports a maximum of 16 lanes, while the Core i9-9980XE supports a maximum of 44. But bigger is not always better—the processors are simply designed for different environments.

However, to complicate things further, there is such a thing known as a PCI Express Switch, which is a chip on some motherboards that is often said to double the number of lanes, but this is not strictly accurate. While it does not magically create more, it does alter how the CPU manages signals to the slots via signal multiplexing. In short, it changes how data is sent and received from the CPU to the PCIe slots in order to utilize the same number of lanes more dynamically across devices to achieve better performance.

Back to the topic at hand: the number of lanes you need depends on how many PCIe devices you want to use in your system, and how fast you want all those devices to run, though noticeable effects on performance usually only occur in niche configurations. A single GPU runs best with 16 lanes. When installing an additional GPU, be sure to use a x16 slot with 16 lanes, if possible. Conversely, if you are adding a x4 card and only have a x8 slot available, that will work too. All PCIe 3.0 slots are compatible with smaller form factor devices, assuming they physically fit into the slot.

Any time you dive into a technology topic, it’s easy to become overwhelmed. Luckily, BOXX has done all the research for you and designed workstations to fit any workflow. The APEXX S3, our flagship workstation, is designed for single-threaded applications that run at peak efficiency with a single high-end GPU. However, if you require that same unmatched overclocked processor (8 cores at 5.1GHz) but require more PCIe lanes, the APEXX Enigma S3 is the perfect option. Or if you need even more space, the APEXX S4 has enough lanes to run four dual-width GPUs.

Results 12th class. Those are just a few examples. Regardless of your specific needs, BOXX has a workstation with your workflow in mind. Talk to a BOXX Performance Specialist today to learn more.

¹ Technically x32 slots do exist, but they’re very rare.

² 7,880MB/s and 15,760MB/s, respectively.

HIS HD 2600XT 256MB GDDR4 PCIe

Add to Product Comparison
Product Code	H260XT256G4DD-R
Cooler	Single-Slot Cooler
GPU	2600XT
Core Clock	800 MHz
Memory Clock	2200 MHz
Memory Size	256 MB
Memory Type	GDDR4
Memory Interface	128 bit
Interface	PCI-Express x16
Availability	Discontinued

Powered by Radeon® HD 2600XT GPU - 800MHz
Superscalar unified shader architecture
120 stream processing units
256MB 128-bit GDDR4 - 2200MHz
Comprehensive DirectX® 10 support
Integrated CrossFire^TM
Built-in HDMI and 5.1 surround audio
Dynamic geometry acceleration
Game physics processing capability

CHIPSET FEATURES

390 million transistors using 65nm fabrication process
Superscalar unified shader architecture
120 stream processing units
128-bit GDDR4 memory interface
Comprehensive DirectX® 10 support
CrossFire^TM multi-GPU
High-speed 128-bit HDR lighting
Up to 24x Custom Filter Anti-Aliasing
ATI Avivo^TM HD Video and Display architecture
Built-in HDMI and 5.1 surround sound
Support for the ATI Radeon^TM DVI to HDMI adapter
Unified Video Decoder (UVD) for Blu-ray^TM and HD DVD

HIS PRODUCTS ADVANTAGE

HIS Radeon™ HD 2600 XT delivers remarkable gaming performance for Windows Vista™ and DirectX® 10
HIS Radeon™ HD 2600 XT features hardware HD video processing and HDMI with built-in 5.1 surround audio
ATI Avivo™ HD technology delivers sharp images and vibrant color fidelity from 1080p playback of Blu-ray™ and HD DVDs movies
HIS Radeon™ HD 2600 XT delivers powerful graphics performance to enhance the stunning Windows Vista™ user experience
65nm process – internal power on all skus

ACCESSORIES

SOFTWARE BUNDLED

Half-Life®2:Lost Coast, Half-Life®2: Deathmatch(OPTIONAL)
Black Box game bundle from Valve Corporation(OPTIONAL)
Driver disc

CABLE/ADAPTOR BUNDLED

HDTV Cable
S-Video Cable
DVI to VGA/D-sub Adapters
Crossfire Bridge
DVI to HDMI Dongle

Dual Width X16 Graphics Slot