NVIDIA

NVIDIA GeForce GTX 1070 SLI

Expert rating3.3 / 10

GPU Brand:: NVIDIA
VRAM:: 2x 8GB GDDR5 (16GB total, 8GB usable)
Memory Type:: GDDR5
TDP:: ~300W combined

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Manufacturer: NVIDIA Last updated: 2026-09-12

NVIDIA GeForce GTX 1070 SLI Review

People search for GTX 1070 SLI setups when they're trying to decide whether reviving an old dual-GPU build is worth the hassle in 2026, usually after finding two cards cheap secondhand.

The honest answer is almost never - SLI support was already fading by the time these cards launched, and most modern games either ignore the second GPU entirely or run worse than a single card would, since developers stopped optimizing for multi-GPU rendering years ago.

The SLI Reality Check

Two GTX 1070s in SLI could theoretically combine 3840 CUDA cores and push serious frame rates in the handful of titles that supported it well back in 2016-2017, but VRAM doesn't pool in SLI, so you're still capped at roughly 8GB of usable memory despite having 16GB installed across both cards. Modern game engines have largely abandoned explicit multi-GPU support, meaning a second 1070 today is often dead weight, adding heat and power draw without a corresponding performance gain.

Comparison to Alternatives

A single NVIDIA GeForce GTX 1080 Ti from the same era matches or beats a GTX 1070 SLI pair in the vast majority of modern titles, while using less power, less case space, and none of SLI's driver-profile headaches. The laptop-side equivalent, NVIDIA GeForce GTX 1070 SLI Mobile, faced the same scaling problems in high-end gaming laptops of that generation, which is part of why manufacturers largely abandoned mobile SLI afterward.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating3.3 / 10

A legacy curiosity, not a practical setup - SLI support has withered enough that a single modern-generation GPU beats it with far less complexity.

Best for

Retro PC builders recreating a specific 2016-2017 dual-GPU rig
Enthusiasts experimenting with legacy SLI-supported titles specifically
Compute workloads in the few applications that still split work across multiple GPUs explicitly

Not for

Anyone wanting reliable gaming performance in modern titles
Buyers hoping VRAM pools across both cards (it doesn't)
Practical builds - a single modern GPU is simpler and usually faster

Specifications

What these specs mean

Platform

GPU Brand	NVIDIA
Board Partner	Varies (2x matched AIB cards + SLI bridge)

Identity and type

Series	GeForce GTX 10
Tier	High-End Multi-GPU (2016, legacy)

Performance

VRAM	2x 8GB GDDR5 (not pooled; ~8GB effective)
Memory Type	GDDR5
Boost Clock	1683 MHz
Ray Tracing Support	No

Physical & Power

TDP	~300W combined (150W per card)
Card Length	267 mm
Slot Width	4

Silicon

Architecture	Pascal
Shader Units	3840

Memory

Memory Bus Width	256 bit
Memory Bandwidth	256 GB/s

Host interface

PCIe Generation	PCIe 3.0 x16 per card + SLI bridge

Market and workstation

Launch Date	2016-06

FAQs

What are the key specifications of the NVIDIA GeForce GTX 1070 SLI?

Key specs for the NVIDIA GeForce GTX 1070 SLI: VRAM 2x 8GB GDDR5 (not pooled; ~8GB effective), Memory Bandwidth 256 GB/s, Boost Clock 1683 MHz, TDP ~300W combined (150W per card), PCIe Interface PCIe 3.0 x16 per card + SLI bridge, Card Length 267 mm.

Who is the NVIDIA GeForce GTX 1070 SLI best suited to?

Best suited to: Retro PC builders recreating a specific 2016-2017 dual-GPU rig; Enthusiasts experimenting with legacy SLI-supported titles specifically; Compute workloads in the few applications that still split work across multiple GPUs explicitly.

What are the drawbacks of the NVIDIA GeForce GTX 1070 SLI?

Not the best fit for: Anyone wanting reliable gaming performance in modern titles; Buyers hoping VRAM pools across both cards (it doesn't); Practical builds - a single modern GPU is simpler and usually faster.