Best 24gb GPUs: Which One to Buy

If you want 24 GB of video memory for gaming plus heavy creative or local AI work, the GeForce RTX 4090 is the fastest 24 GB card from the last generation, the Radeon RX 7900 XTX is the 24 GB option for buyers who prefer AMD, and the GeForce RTX 3090 or 3090 Ti is the route for those who accept an older architecture. Nothing in the current mainstream gaming range below the flagship tier shares that capacity, so the choice is really about which trade-off you can live with.

Who actually needs 24 GB

For 1080p and most 1440p play, far less memory is used, and a 16 GB card covers nearly all current games. A 24 GB card makes sense for 4K with maximum textures and heavy mods, for video editing and 3D rendering with large scenes, and for running larger local AI models, where VRAM capacity decides whether a model loads at all. If gaming is your only use, a faster card with less memory is often the better spend. NVIDIA’s top current-generation GeForce card, the RTX 5090, steps up to 32 GB, so it sits above this guide’s range.

NVIDIA RTX PRO 4000 Blackwell Graphics Card - 24GB GDDR7 ECC Memory, PCIe 5.0 x16, 4X DisplayPort 2.1b, Single Slot Full Height AI Workstation GPU, Retail Packaging

Chosen because it specifies 24GB GDDR7 ECC Memory and PCIe 5.0 x16.

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Apple 2026 MacBook Pro Laptop with Apple M5 Pro chip with 15-core CPU and 16-core GPU: Built for AI, 14.2-inch Liquid Retina XDR Display, 24GB Unified Memory, 1TB SSD, Wi-Fi 7; Silver

Chosen because it specifies 14.2-inch Liquid Retina XDR Display and 24GB Unified Memory.

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ASRock Intel Arc Pro B60 Creator 24GB Graphics Card, Workstation GPU, Xe2-HPG, 2400MHz, 24GB GDDR6 192-bit, PCIe 5.0, 4X DP 2.1, Blower

Chosen because it specifies Workstation GPU and Xe2-HPG.

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NVIDIA RTX PRO 4000 SFF Blackwell 24GB GDDR7 ECC - PCIe 5.0x8, 4X mDP 2.1b, Low-Profile Dual-Slot AI Workstation GPU Retail

Chosen because it specifies PCIe 5.0x8 and 4X mDP 2.1b.

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NVIDIA RTX PRO 4000 Blackwell Graphics Card - 24GB GDDR7 ECC Memory, PCIe 5.0 x16, 4X DisplayPort 2.1b, Single Slot Full Height AI Workstation GPU, Retail Packaging

Chosen because it specifies 24GB GDDR7 ECC Memory and PCIe 5.0 x16.

View on Amazon →

Apple 2026 MacBook Pro Laptop with Apple M5 Pro chip with 15-core CPU and 16-core GPU: Built for AI, 14.2-inch Liquid Retina XDR Display, 24GB Unified Memory, 1TB SSD, Wi-Fi 7; Silver

Chosen because it specifies 14.2-inch Liquid Retina XDR Display and 24GB Unified Memory.

View on Amazon →

ASRock Intel Arc Pro B60 Creator 24GB Graphics Card, Workstation GPU, Xe2-HPG, 2400MHz, 24GB GDDR6 192-bit, PCIe 5.0, 4X DP 2.1, Blower

Chosen because it specifies Workstation GPU and Xe2-HPG.

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NVIDIA RTX PRO 4000 SFF Blackwell 24GB GDDR7 ECC - PCIe 5.0x8, 4X mDP 2.1b, Low-Profile Dual-Slot AI Workstation GPU Retail

Chosen because it specifies PCIe 5.0x8 and 4X mDP 2.1b.

View on Amazon →

At a glance

GeForce RTX 4090

NVIDIA lists the RTX 4090 with 24 GB of GDDR6X, 16,384 CUDA cores, and a total graphics power of 450 W, with an average gaming power of 315 W. The maker lists a minimum 850 W system power supply and power through either three 8-pin PCIe cables or one PCIe Gen 5 cable rated 450 W or more. It uses the Ada Lovelace architecture with dedicated ray-tracing and tensor cores, and supports DLSS.

The practical issues are physical. Many partner models are very large and occupy three or more slots, so measure case clearance and check the cooler length in the partner maker’s specifications. The power connector needs a firm, fully seated plug and a bend-free cable path; follow the card maker’s and power supply maker’s manuals closely, and if you are unsure about electrical work inside the PC, ask a qualified technician. As a previous-generation product, stock varies, and buyers should look for sellers that provide a warranty.

GeForce RTX 3090 and RTX 3090 Ti

NVIDIA’s specification page covers both cards. Each has 24 GB of GDDR6X on a 384-bit interface. The 3090 has 10,496 CUDA cores, 350 W of card power, and a 750 W minimum power supply, using two 8-pin PCIe cables with an adapter to the 12-pin connector included. The 3090 Ti has 10,752 cores, 450 W, and an 850 W minimum supply, with three 8-pin cables through an adapter, a 12-pin cable, or a PCIe Gen 5 16-pin cable.

These Ampere cards lack the newer generation’s frame generation features, but the memory amount is the same as the RTX 4090, which keeps them relevant to AI hobbyists who care about capacity first. Because they are older, most available units are used, so inspect return terms and ask about the card’s history. A card that has run continuous workloads for years may have worn fans or aging thermal pads. The 3090 draws noticeably less power than the Ti, which can matter for a modest power supply.

Radeon RX 7900 XTX

AMD’s RX 7900 XTX carries 24 GB of GDDR6 and was the company’s flagship in the Radeon 7000 series. Its attraction for gamers is large memory with strong traditional rendering, and AMD’s own software features such as FSR. This guide states only the memory amount; read AMD’s product page for board power, recommended power supply, and connector requirements before you buy.

For local AI work the software ecosystem matters as much as the memory. NVIDIA’s CUDA is the default target of many tools, while AMD’s ROCm support depends on the tool and operating system. If a specific application is your goal, read its documentation for supported GPUs first.

Pick X if…

Fit, power, and compatibility notes

• Case clearance. Look up the partner model’s length, width, and slot thickness, and include room for the power plug at the side.
• Power supply. Use the maker’s minimum wattage as a floor, and choose a quality unit with the right connectors rather than splitting cables.
• PCIe slot. These cards use a x16 slot; older boards generally work but check the manual.
• Cooling. A 450 W card pushes heat into the case, so plan for airflow.
• Bottlenecks. At 1440p and below, a mid-range CPU can limit a flagship GPU.

Alternatives

• A 16 GB current-generation card covers nearly all gaming at 4K with a smaller power draw and newer features.
• The RTX 5090 at 32 GB is the step up for anyone who needs more than 24 GB, with its own higher power and size demands.
• Workstation cards with 24 GB or more exist for professional workloads, but they are priced for business use and are not tuned for gaming.

Budget tiers in plain terms

There is no budget tier for new 24 GB cards. The mid-range tier is used or discounted RTX 3090 and 7900 XTX units, and the premium tier is the RTX 4090 and above. Compare total cost including a new power supply if yours falls short of the listed minimum.

Power and heat in practice

The listed board power tells only part of the story. A 450 W card, as NVIDIA lists for both the RTX 4090 and the RTX 3090 Ti, turns nearly all of that power into heat inside the case, so airflow decides whether the card holds its boost clocks quietly. Front intake fans, a clear exhaust path, and a case with mesh panels help. Cards with three-slot coolers are easier to keep quiet than compact two-slot designs. If your case is small, compare the partner model’s thermal design before the model’s name.

Power connectors deserve equal care. The 12-pin and PCIe Gen 5 16-pin connectors must be pushed in fully and routed without a sharp bend close to the plug. Use the cable supplied by the card or power supply maker, and follow their manuals. A card that needs three 8-pin cables also needs three free connectors on the power supply, which not every unit provides. Plan the power supply and the case together with the card, and ask a qualified technician if you are unsure.

Frequently Asked Questions

Is 24 GB of VRAM necessary for gaming?

No. Most games run well within 12 to 16 GB at 1440p. A 24 GB card pays off for 4K with high-resolution textures, large mods, and creative or AI workloads that need the memory.

What power supply does an RTX 4090 need?

NVIDIA lists a minimum of 850 W, with three 8-pin cables or one 450 W or higher PCIe Gen 5 cable. Follow the specific model’s manual, since partner cards may state their own requirements.

Is the RTX 3090 still worth buying?

It can be if you need 24 GB for a lower outlay and do not need newer features. It lacks the newer generation’s frame generation, and used units carry condition risk.

Does the RX 7900 XTX work for AI?

It has the capacity, but software support varies by tool and operating system. Check that your application supports Radeon before buying.

Will a 24 GB card fit my case?

Many are large. Compare the card’s length and thickness with your case’s maximum GPU length and slot count, and leave space for the power connector.

Should I wait for a newer 24 GB card?

There is no confirmed product to point to in this guide. If your need is immediate, buy within the options above; if you can wait, watch the makers’ own announcements.