03/02/2026 3:30 am
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Hey everyone! I finally managed to get my hands on an RTX 3090 Ti for my dream workstation/gaming build, but I’m hitting a bit of a wall when it comes to picking the right RAM to pair with it. Since this card is such a beast and draws a ton of power, I want to make sure I’m not creating a bottleneck elsewhere in the system. I’m planning to use this setup for some pretty heavy 4K video editing in Premiere and Davinci Resolve, along with some high-end gaming on the side, so I know I need something fast and reliable.
Currently, I'm looking at a build centered around an i9-12900K and a Z690 motherboard. I’ve been debating between sticking with high-speed DDR4 or making the jump to DDR5, though the latencies on some of the newer DDR5 kits have me a little worried. I want to ensure the memory bandwidth can actually keep up with the 24GB of VRAM on the 3090 Ti without any stuttering during heavy rendering tasks.
I’ve been eyeing a 64GB kit (either 3600MHz CL16 for DDR4 or maybe 6000MHz for DDR5), but I’m seeing a lot of conflicting info about what actually impacts performance with this specific GPU. Is it better to prioritize lower latency or raw clock speed when dealing with a card this powerful? My budget for the RAM is around $300-$400, and I’d prefer something with a clean aesthetic (RGB is fine, but not a dealbreaker).
For those of you running a 3090 Ti, what memory kits have you found provide the most stable performance, and do you think 64GB is overkill or the 'sweet spot' for a build of this caliber?
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03/02/2026 4:15 am
yo!! Im literally sooo excited for your build, that 3090 Ti is amazing!! I remember being super confused about latency vs speed too. Quick tip: for Davinci, raw bandwidth is king, so high-speed DDR5 is actually a huge win even with higher timings. Before I suggest something like the Kingston FURY Beast 64GB (2x32GB) 6000MT/s DDR5 CL36, can you clarify if you plan on using two or four sticks? It reallyyy matters for stability on Z690!!
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03/02/2026 4:05 am
Seconding the recommendation above! Honestly, I was sooo torn between DDR4 and DDR5 too, but for a beast like the 3090 Ti and an i9-12900K, you really wanna go DDR5. Even if the latencies look high on paper, the raw bandwidth is basically a requirement for heavy 4K rendering in DaVinci.
I’m currently using a 64GB kit of G.Skill Trident Z5 RGB 64GB (2 x 32GB) DDR5-6000 CL30-40-40-96 and it has been rock solid. I was worried about stuttering during playback, but 64GB is definitely the sweet spot—it’s not overkill at all for workstation tasks! If you want something a bit cleaner without too much flash, the Kingston FURY Renegade DDR5 64GB 6000MT/s CL32 is a great alternative that fits right in your budget. The higher clock speed really helps keep the CPU fed while that GPU is chewing through exports. I'm super satisfied with the performance so far, no complaints here! gl with the build dude!
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03/02/2026 4:05 am
For your situation, I would suggest going DDR5 to avoid bottlenecks. Honestly, 64GB isn't overkill for 4K editing—it's actually pretty SAFE to prevent crashes during heavy exports.
* DDR4: Might limit that 3090 Ti bandwidth.
* DDR5: Much smoother for Davinci rendering.
Just go with a reliable brand like Kingston or maybe Crucial. I've found their stuff way more stable for workstation tasks than the super overclocked kits. gl!
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03/02/2026 3:31 am
> I’ve been debating between sticking with high-speed DDR4 or making the jump to DDR5, though the latencies on some of the newer DDR5 kits have me a little worried.
Sooo I went through this exact same struggle with my 3090 Ti build and honestly? I was kinda disappointed with DDR4 at first. I tried sticking with a high-end G.Skill Trident Z Neo 64GB (2x32GB) 3600MHz CL16-22-22-42 DDR4 kit because I thought the low latency would save me, but for heavy 4K rendering in DaVinci, the raw bandwidth of DDR5 actually makes a noticeable difference.
I ended up swapping to the Corsair Vengeance RGB 64GB (2x32GB) DDR5 6000MHz C40 and even though the CAS latency looks high on paper, it's way smoother for workstation tasks. Plus, with a 12900K, you're basically leaving performance on the table by staying on the old platform. 64GB is definitely the sweet spot—32GB felt like it was choking during long export sessions. If you can swing the price, just go DDR5 now so you dont have to swap your mobo later lol. gl!
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20/02/2026 9:20 am
Just saw this thread. Everyone is hitting the nail on the head regarding DDR5 bandwidth for 4K workflows, but since youre going the DIY route, you need to be careful with the Z690 memory controller. To avoid the stuttering you mentioned, you really want a kit with Hynix ICs because they play way nicer with the 12th gen IMC compared to the early Samsung dies. I'd grab the TeamGroup T-Force Delta RGB 64GB (2x32GB) DDR5 6000MHz CL30. Its a solid kit that usually offers great stability and fits right in your budget. One thing though—once youve got it installed, dont just trust XMP/XMP II. Run [[RESOURCE:TestMem5 with the Extreme1 config by anta777]] for at least a few cycles. If it passes that, your Davinci renders will be rock solid. Also, check out the [[RESOURCE:HardwareLuxx DDR5 SPD database]] if you want to verify exactly which memory chips are in a specific kit before buying. 64GB is definitely the sweet spot for your build; any less and youll likely see the system swapping to disk during complex Premiere exports when that 3090 Ti is fully loaded.
