ATi Radeon HD 4870 X2 Review

There's something almost mythological about the ATi Radeon HD 4870 X2. This is the card that forced NVIDIA's hand — the dual-GPU monster that made Jensen Huang's team slash prices on the GeForce GTX 280 faster than you can say "market pressure." If you're a GPU history enthusiast, a retro build fanatic, or someone who stumbled across this beast at an estate sale, buckle up. This one has a story worth telling.

A Piece of GPU History

The HD 4870 X2 landed in 2008 — the same era that gave us the Core 2 Duo, DDR2 RAM, and Windows Vista's glass aesthetic that Reddit users are apparently still nostalgic about. ATi (then freshly under AMD's banner) packed two Radeon HD 4870 GPUs onto a single PCB, each equipped with 1GB of GDDR5 VRAM, communicating over an onboard bridge. The result was the fastest single graphics card you could buy at the time, full stop.

The Gamers Nexus teardown of a rare prototype unit — highlighted on r/GamersNexus — described Steve Burke spending 25 relaxed minutes walking through the card's history, which tells you something: this GPU has earned its place in the retrospective canon alongside the 7970 and other AMD legends that longtime community members still cite in "what a ride it has been" threads.

What You're Actually Getting

Two RV770 GPU cores. Two 256-bit memory buses. 2GB of GDDR5 total. A CrossFireX bridge baked right onto the card. At launch, this delivered frame rates that genuinely embarrassed the competition at the top of the market — and AMD priced it aggressively enough that NVIDIA had to respond by cutting GTX 280 prices almost immediately. That's not marketing spin; that's documented market history that the r/GamersNexus community specifically called out.

The card draws serious power — expect two 8-pin (or 6-pin, depending on the board partner) power connectors and a system that runs hot and loud under load. This was 2008 thermal design at its most ambitious. Nobody was winning awards for acoustics here.

The Dual-GPU Catch

Here's what you need to know before getting excited: dual-GPU cards live and die by driver support, and the HD 4870 X2 is no exception. In its prime, micro-stuttering was a real complaint — those two GPUs don't always deliver frames in perfectly smooth cadence, even when average frame rates look impressive on paper. For the era, it was a known trade-off. Reviewers and the community consistently noted that a single fast GPU often felt smoother in practice, even if the X2 won on benchmark numbers.

For anyone considering this card today — in a retro build running Vista-era games like the r/pcmasterrace community member who built their 2008 rig — the driver situation is essentially frozen in amber. You're running legacy AMD drivers, compatibility is what it is, and you should go in with eyes open.

Heat, Noise, and Power: The Trifecta of "Enthusiast" Problems

The cooler on the HD 4870 X2 was doing heroic work. Two RV770 dies, GDDR5 running hot, all in a form factor that barely fit in mid-tower cases of the era. The blower-style cooler moves air, but it moves it loudly. If you ran one of these in a LAN party back in 2008, your neighbors knew about it. This is not a card you put in a living room PC unless you enjoy the ambient sound of a small turbine.

Power consumption was equally dramatic. Budget at least a 750W PSU, and make sure it's a quality unit. The card doesn't forgive a weak power supply.

Who This Is For (and Who Should Skip It)

The honest target audience for an HD 4870 X2 in 2024+ is narrow but passionate:

• Retro PC builders recreating authentic 2008 high-end rigs — this card is period-correct prestige hardware
• GPU collectors and historians — the prototype variant alone is a museum piece; even retail units have real historical significance
• Nostalgia enthusiasts who want to replay Crysis, Far Cry 2, or other late-2000s titles on authentic hardware

If you're hoping to use this as a budget gaming GPU for modern titles — don't. VRAM limitations, driver support, and raw architectural age make this a non-starter for anything released in the last decade. The r/Amd community's "what a ride it has been" thread captures the sentiment perfectly: these GPUs are cherished memories, not current workhorses.

Buyer Tips

• Check that both GPU cores are recognized properly before paying — dead or partially failed X2 cards are common at this age
• Thermal paste on both dies is almost certainly dried out. Budget for a repaste before pushing the card hard
• Verify your PSU has the required connectors and wattage headroom
• If you find a prototype or engineering sample unit, treat it as a collector's item — the Gamers Nexus teardown suggests these are genuinely rare

Final Verdict

The ATi Radeon HD 4870 X2 is a genuine landmark in GPU history — the card that proved AMD could punch at the very top of the market and force NVIDIA to respond. For collectors and retro builders, it's an essential piece of hardware with a story that holds up 15+ years later. For anyone else, the dual-GPU quirks, legacy driver situation, and raw heat output mean this is strictly a passion purchase, not a practical one. That's not a knock — some things are worth owning for the history alone.

Frequently Asked Questions

Q: Can the ATi Radeon HD 4870 X2 run modern games?

A: Not realistically. Driver support is frozen at legacy AMD releases, and the architecture dates to 2008. It will run Vista and early DirectX 10 era games well, but anything from the last decade is off the table for practical use.

Q: Why did the HD 4870 X2 matter historically?

A: It was the fastest single-card GPU available at launch and directly forced NVIDIA to cut prices on the GeForce GTX 280, reshaping the high-end GPU market in 2008. The r/GamersNexus community specifically highlighted this as one of AMD's most impactful competitive moves.

Q: Is micro-stuttering a real problem with the 4870 X2?

A: Yes — dual-GPU cards of this era were known for frame pacing issues that made gameplay feel less smooth than raw benchmark numbers suggested, even when average FPS was high. It was the defining trade-off of the platform.

Q: What PSU do I need for the HD 4870 X2?

A: A quality 750W unit is the safe minimum. The dual-GPU design draws substantial power under load and is unforgiving of weak or cheap power supplies.

Q: Is the HD 4870 X2 worth buying today?

A: Only for retro builds, GPU collecting, or historical interest. As a functional gaming card for modern use, there are far better options at any price point. But as a 2008-era prestige piece, it remains one of the most significant GPUs AMD ever produced.

— Tech Lead Editor 3, CPrice