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Trari › Linus Tech Tips
On today's chart 791K views since yesterday

Luke's RTX 4090 memory upgrade needs a whole new board

Linus Tech Tips visits Michigan specialist Greg Sky for a delicate hardware transplant designed to run AI locally.

Channel: Linus Tech Tips Story of Trari Newsroom

No. 68 on the daily chartNo. 4 on the Tech chart

Why this story? One of the most watched videos since yesterday, with 791,333 views.

I Doubled My GPU’s Memory…I Doubled My GPU’s Memory…

Things we can learn from the video

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  1. 3:20Custom circuit boards hold memory on both sides, allowing each RTX 4090's capacity to double.
  2. 8:55Greg removes GPU cores and memory modules from the donor cards using infrared heat.
  3. 14:34Stencils position fresh solder balls across the GPU cores before reflow in an infrared oven.
  4. 20:00Optical alignment lines up the GPU core's solder connections with the replacement board.
  5. 24:05The assembled card boots into Windows and runs a Vulkan memory test for stability and bandwidth.
  6. 25:00An ultrasonic water bath removes residual flux, followed by air-drying and a twelve-hour oven bake.

Getting more memory for a graphics card usually means replacing the card. Luke heads to a Michigan workshop to try something considerably more involved: keeping its valuable chips, but giving them a new home.

In Linus Tech Tips' "I Doubled My GPU's Memory…", hardware specialist Greg Sky helps turn two RTX 4090 cards into versions with 48GB of memory each, twice their original capacity. The upload has drawn about 791,000 views since yesterday. Luke's aim is to run AI on his own hardware rather than rely on cloud subscriptions.

This isn't a matter of clicking another memory stick into a slot. Custom circuit boards accommodate memory chips on both sides, and the donor cards surrender their GPU cores and memory modules under infrared heat. Greg and Luke clean the contact pads, apply fresh solder balls and carefully position the components for their new boards.

The equipment does some extraordinarily precise work. An optical alignment system lets them line up the GPU core's solder connections before heating it into place. Luke gets hands-on throughout, moving from "I can't see anything" during an early attempt to a delighted "I got a job!" later in the process.

The finished card boots into Windows, where they run a memory test to check stability and bandwidth. There is still an unexpectedly domestic-looking finish: an ultrasonic water bath to remove flux, followed by drying and a long oven bake before shipping. The video also contains sponsored smart-ring segments.

Among the comments, viewers pick out Luke's hosting return, compare Greg's workshop to a Half-Life 2 setting and notice the IBM Model M keyboard on the test bench. Greg gives his visiting apprentice a company shirt and welcomes him to the team. Luke settles on a more modest title: "Honorary employee."

Published on Trari

Where next?

More from Linus Tech TipsOn today's chart 568K views since yesterdayLinus Tech Tips' GTA 6 question leads to Bloodborne on PCConsole-game testing turns a speculative title into a practical look at emulation, AI-assisted coding and the hardware needed to make it work.Channel: Linus Tech Tips · Story of November 2, 2026 Also in Technology reviews and gadgetsA video worth knowingGamers Nexus challenges Altman's take on the RAM in your PCSteve Burke argues that local computing has uses a global resource-allocation argument misses, including working without an internet connection.Channel: Gamers Nexus · Story of November 2, 2026 A different discovery todayA video worth knowingNileBlue's skull candy hits every taste at once, but no flavorA sweetener thousands of times stronger than sugar, a famously bitter compound and pure capsaicin go into the brass-molded drops, and the verdict surprises eve…Channel: NileBlue · Story of November 2, 2026

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The facts
Subscribers
16,900,000
Channel views, last 7 days
18,828,418
Channel views, pace per day
938,741 (on a normal day: 2,918,682)
Video published
October 31, 2026
Video views so far
791,333 (less than a day online)
Video views, pace per day
1,202,039

The numbers

The memory-upgrade video drew a substantial audience before its first full day was over. Here are its views and early responses.

subscribers
16,900,000
no significant change in the last 7 days
total views
9,954,306,210
views per day
938,741
typical day: 2,918,682
the video
views
791,333
likes
21,360
comments
1,204
days online
1
subscribers: this channel and similar channels
Unbox Therapy
25,600,000
Mrwhosetheboss
23,000,000
Marques Brownlee
21,400,000
Linus Tech Tips
16,900,000
The Q
13,100,000
CrazyRussianHacker
12,100,000
As of November 1, 2026 · Data source: Trari Social News, Trari Traffic Trends and Ranking Platform, Google YouTube
Subscriber, view, like and comment counts are YouTube's. Rates, usual days, rankings, comparisons and categories are Trari's own calculations.
Developed with YouTube

💡 Test your knowledge

Which state does Luke visit for the graphics-card upgrade?