AMD
Radeon Vega 11CU 3400G vs ATI Radeon HD 3870 X2
Full comparison of specs, performance and benchmarks
AMD
ATI Radeon HD 3870 X2
Aggregate performance score
We've compared Vega 11CU 3400G and ATI Radeon HD 3870 X2 across specs and all relevant benchmarks.
↗Vega 11CU 3400G outperforms ATI Radeon HD 3870 X2 by 42% based on our aggregate benchmark results.+42%
Scores are normalized on the Head to Head scale. Higher is better.Radeon Vega 11CU 3400G vs ATI Radeon HD 3870 X2: key takeaway
The comparison of Vega 11CU 3400G and ATI Radeon HD 3870 X2 shows a 42% advantage for Vega 11CU 3400G in gaming performance, while ATI Radeon HD 3870 X2 may still be stronger in efficiency and feature set. Use the sections below to check whether that lead comes from real FPS, specifications, efficiency, price or platform features.
SUMMARY PROFILE
Verified-metrics radar
Axes with missing data are hidden; every value uses a fixed scale.
AMDPerformance
Price / performance
4431
100100
COMPARISON RESULT
Vega 11CU 3400G is the best overall choice
Vega 11CU 3400G leads in combined game performance. Vega 11CU 3400G offers the better price per frame, while the final choice depends on the required features, memory, and games.
Vega 11CU 3400G leads in the combined performance index
ATI Radeon HD 3870 X2 costs less
CATALOG POSITION
Full ranking →Graphics card ranking
Positions 238–243of 317
COMPARISON VERDICT
Which should you choose?
Two practical conclusions based on community votes and gaming value.
ATI Radeon HD 3870 X2
179 likesHead to Head visitors currently choose this model more often.
Radeon Vega 11CU 3400G
100/100 · Price $119The choice is based on the price-to-performance index and launch price.
OVERALL SCORE
Overview
Scores are calculated from specifications, performance, and efficiency.
The Summary score section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
GamesDirectX, OpenCL, and Vulkan performance
44Better
31
Professional applications3D modeling, video editing, and rendering
38Better
29
AI and machine learningMachine-learning and AI capabilities
36Better
26
Power efficiencyPower consumption across workloads
51
53Better
Head to Head scoreOverall catalog score
58Better
49
FULL COMPARISON
Specifications
The better numeric value is highlighted in green, taking the metric direction into account.
The Specifications section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
Device classDesktopDesktop
DirectX12.010.1
Vulkan1.2—
OpenGL4.63.3
HDMIHDMI 2.0b—
DisplayPortDisplayPort 1.4—
Max monitorsVaries by board3
Max resolution7680 × 43202560 × 1600
USB Type-CNoNo
Recommended PSUVaries by board450 W
LengthVaries by board267 mm
ThicknessVaries by boardDual-slot
Shader units / coresNot publicly specified320
Memory cacheNot publicly specifiedL2 0.25 MB
Power consumption—196 W
TFLOPS1.97Better0.528
VRAM- SMA1 GB GDDR3
Memory typeSMAGDDR3
Memory frequency—1,8 GHz
Memory bus—256x2 bit
Memory bandwidth—58 GB/s
InterfaceIGPPCIe 2x16
Power connector—6+8 pin
Power consumption—196 W
Release date20192008
Upscaling——
Compute API——
Launch price—$159
Clock speed300 - 1400 MHz825 MHzBetter
Base clock300 MHz825 MHzBetter
Boost clock1400 MHzBetter825 MHz
Process node12 nmBetter55 nm
ArchitectureNot publicly specifiedTeraScale
Transistor countNot publicly specified666 million
Die sizeNot publicly specified192 mm²
GAME TEST BENCH
Gaming FPS
Available results are shown separately; missing data is not treated as zero.
The Gaming FPS section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 across curated H2H Lab game presets. The useful signal is not only average FPS, but also how each device behaves at 1440p and 4K, how memory capacity and bus width affect heavy textures, and whether the game engine favors raster performance, ray tracing, or driver maturity.
Vega 11CU 3400GATI Radeon HD 3870 X2
Verified H2HCommunity VerifiedEstimatedPredicted
Black Myth: Wukong
1080p High
21 FPSEstimated 66%
18 FPSEstimated 64%
1080p Ultra
18 FPSEstimated 66%
15 FPSEstimated 64%
1440p Ultra
14 FPSEstimated 66%
8 FPSEstimated 58%
4K Ultra
8 FPSEstimated 66%
5 FPSEstimated 55%
Black Myth: WukongVega 11CU 3400G21 FPSEstimated 66%ATI Radeon HD 3870 X218 FPSEstimated 64%Vega 11CU 3400G18 FPSEstimated 66%ATI Radeon HD 3870 X215 FPSEstimated 64%Vega 11CU 3400G14 FPSEstimated 66%ATI Radeon HD 3870 X28 FPSEstimated 58%Vega 11CU 3400G8 FPSEstimated 66%ATI Radeon HD 3870 X25 FPSEstimated 55%
Call of Duty: WarzoneVega 11CU 3400G21 FPSEstimated 66%ATI Radeon HD 3870 X218 FPSEstimated 64%Vega 11CU 3400G18 FPSEstimated 66%ATI Radeon HD 3870 X215 FPSEstimated 64%Vega 11CU 3400G14 FPSEstimated 66%ATI Radeon HD 3870 X28 FPSEstimated 58%Vega 11CU 3400G8 FPSEstimated 66%ATI Radeon HD 3870 X25 FPSEstimated 55%
Counter-Strike 2Vega 11CU 3400G179 FPSEstimated 74%ATI Radeon HD 3870 X2153 FPSEstimated 72%Vega 11CU 3400G126 FPSEstimated 74%ATI Radeon HD 3870 X2107 FPSEstimated 72%Vega 11CU 3400G98 FPSEstimated 74%ATI Radeon HD 3870 X260 FPSEstimated 66%Vega 11CU 3400G49 FPSEstimated 74%ATI Radeon HD 3870 X223 FPSEstimated 63%
Cyberpunk 2077Vega 11CU 3400G116 FPSEstimated 74%ATI Radeon HD 3870 X298 FPSEstimated 72%Vega 11CU 3400G100 FPSEstimated 74%ATI Radeon HD 3870 X285 FPSEstimated 72%Vega 11CU 3400G71 FPSEstimated 74%ATI Radeon HD 3870 X244 FPSEstimated 66%Vega 11CU 3400G33 FPSEstimated 74%ATI Radeon HD 3870 X215 FPSEstimated 63%
Forza Horizon 5Vega 11CU 3400G146 FPSEstimated 80%ATI Radeon HD 3870 X2124 FPSEstimated 78%Vega 11CU 3400G95 FPSEstimated 74%ATI Radeon HD 3870 X280 FPSEstimated 72%Vega 11CU 3400G88 FPSEstimated 74%ATI Radeon HD 3870 X254 FPSEstimated 66%Vega 11CU 3400G72 FPSEstimated 74%ATI Radeon HD 3870 X233 FPSEstimated 63%
God of War RagnarökVega 11CU 3400G21 FPSEstimated 66%ATI Radeon HD 3870 X218 FPSEstimated 64%Vega 11CU 3400G18 FPSEstimated 66%ATI Radeon HD 3870 X215 FPSEstimated 64%Vega 11CU 3400G14 FPSEstimated 66%ATI Radeon HD 3870 X28 FPSEstimated 58%Vega 11CU 3400G8 FPSEstimated 66%ATI Radeon HD 3870 X25 FPSEstimated 55%
Hogwarts LegacyVega 11CU 3400G95 FPSEstimated 74%ATI Radeon HD 3870 X280 FPSEstimated 72%Vega 11CU 3400G79 FPSEstimated 74%ATI Radeon HD 3870 X267 FPSEstimated 72%Vega 11CU 3400G64 FPSEstimated 74%ATI Radeon HD 3870 X239 FPSEstimated 66%Vega 11CU 3400G33 FPSEstimated 74%ATI Radeon HD 3870 X215 FPSEstimated 63%
Microsoft Flight Simulator 2024Vega 11CU 3400G21 FPSEstimated 66%ATI Radeon HD 3870 X218 FPSEstimated 64%Vega 11CU 3400G18 FPSEstimated 66%ATI Radeon HD 3870 X215 FPSEstimated 64%Vega 11CU 3400G14 FPSEstimated 66%ATI Radeon HD 3870 X28 FPSEstimated 58%Vega 11CU 3400G8 FPSEstimated 66%ATI Radeon HD 3870 X25 FPSEstimated 55%
Monster Hunter WildsVega 11CU 3400G21 FPSEstimated 66%ATI Radeon HD 3870 X218 FPSEstimated 64%Vega 11CU 3400G18 FPSEstimated 66%ATI Radeon HD 3870 X215 FPSEstimated 64%Vega 11CU 3400G14 FPSEstimated 66%ATI Radeon HD 3870 X28 FPSEstimated 58%Vega 11CU 3400G8 FPSEstimated 66%ATI Radeon HD 3870 X25 FPSEstimated 55%
StarfieldVega 11CU 3400G21 FPSEstimated 66%ATI Radeon HD 3870 X218 FPSEstimated 64%Vega 11CU 3400G18 FPSEstimated 66%ATI Radeon HD 3870 X215 FPSEstimated 64%Vega 11CU 3400G14 FPSEstimated 66%ATI Radeon HD 3870 X28 FPSEstimated 58%Vega 11CU 3400G8 FPSEstimated 66%ATI Radeon HD 3870 X25 FPSEstimated 55%
HEAD TO HEAD · CALCULATED INDEX
H2H workload indices
Comparable internal indices on a fixed 0–100 scale.
The Benchmarks section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
H2H Raster IndexH2H Index / 100443135%
H2H Compute IndexH2H Index / 100443232%
H2H Rendering IndexH2H Index / 100443426%
H2H Memory Workload IndexH2H Index / 100043200%
H2H Efficiency IndexH2H Index / 100053200%
These are versioned H2H calculated indices derived from normalized catalog data. They are not results from a third-party benchmark.
HEAD TO HEAD · CALCULATED INDEX
H2H AI workload indices
Estimated workload profiles based on available performance and memory data.
The Detailed comparison section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
H2H Image Generation IndexH2H Index / 100443620%
H2H ML Training IndexH2H Index / 100443620%
H2H Inference IndexH2H Index / 100443426%
H2H Local LLM IndexH2H Index / 100443815%
H2H Computer Vision IndexH2H Index / 100443523%
These are versioned H2H calculated indices derived from normalized catalog data. They are not results from a third-party benchmark.
Graphics APIs, SDKs and upscaling
The Graphics APIs, SDKs and upscaling section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
DirectX12.010.1
Vulkan1.2—
OpenGL4.63.3
Upscaling——
Compute API——
Architecture and release
The Architecture and release section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
ArchitectureNot publicly specifiedTeraScale
Process node12 nmBetter55 nm
Release date20192008
Device classDesktopDesktop
GPU cores, die and clocks
The Core layout and clocks section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
Transistor countNot publicly specified666 million
Die sizeNot publicly specified192 mm²
Shader units / coresNot publicly specified320
Base clock300 MHz825 MHzBetter
Boost clock1400 MHzBetter825 MHz
Board size, power and compatibility
The Form factor and compatibility section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
InterfaceIGPPCIe 2x16
LengthVaries by board267 mm
ThicknessVaries by boardDual-slot
Recommended PSUVaries by board450 W
Power connector—6+8 pin
Display outputs and limits
The Display outputs section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
HDMIHDMI 2.0b—
DisplayPortDisplayPort 1.4—
USB Type-CNoNo
Max monitorsVaries by board3
Max resolution7680 × 43202560 × 1600
Memory and compute throughput
The VRAM capacity and bandwidth section compares Vega 11CU 3400G and ATI Radeon HD 3870 X2 with normalized H2H data, turning specifications, tests and value signals into practical buying context.
VRAM- SMA1 GB GDDR3
Memory typeSMAGDDR3
Memory bus—256x2 bit
TFLOPS1.97Better0.528
HEAD TO HEAD · DISCOVER
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AI EXPLAIN · HEAD TO HEAD
Explain this comparison
Beyond percentages: causes, relevant specifications, and practical impact behind every chart.
What AI will explain
Overall score, radar, FPS, synthetic tests, specifications, efficiency, and value.
REAL CONFIGURATIONS
Owner experiences
Real builds, results, and community feedback.
♢Moderator reviewed☆Helpful to the community🏅Expert badges
Frequently asked comparison questions
Short recommendations based on performance, memory, power consumption, and intended use.
01Which is better for gaming: Vega 11CU 3400G or ATI Radeon HD 3870 X2?+
Vega 11CU 3400G has the higher overall gaming score, while Vega 11CU 3400G offers the better price-to-performance ratio. The final choice depends on resolution and settings.
02Which is better for streaming?+
Vega 11CU 3400G is the stronger streaming choice thanks to performance, hardware encoding, and application support. Check AV1, H.264, and HEVC support before buying.
03Which is better for Blender?+
Vega 11CU 3400G is generally the better option for Blender and GPU rendering. Rendering-engine support and available VRAM also matter.
04Which is better for video editing?+
Vega 11CU 3400G offers more overall performance, while Vega 11CU 3400G offers more memory headroom. Codecs, hardware encoders, and editor optimization can change the result.
05Which is better for neural networks and AI?+
Vega 11CU 3400G is the more practical option for local AI workloads. VRAM capacity, compute libraries, and framework compatibility are especially important.
06Which is better for 1080p?+
Vega 11CU 3400G is the most rational 1080p choice, where high frame rates and cost per frame matter most.
07Which is better for 1440p?+
Vega 11CU 3400G leads in combined 1440p performance. Vega 11CU 3400G can be preferable for heavy textures and games with high VRAM usage.
08Which is better for 4K?+
Vega 11CU 3400G is preferable for 4K, where total performance, memory bandwidth, and VRAM capacity have the greatest impact.
09Which is better for a quiet PC?+
ATI Radeon HD 3870 X2 is easier to use in a quiet build because of its lower estimated power and thermal load. Actual noise depends on the specific cooler.
10Which is better without replacing the power supply?+
ATI Radeon HD 3870 X2 is the safer candidate because its stated power consumption is lower. Verify PSU wattage, age, and power connectors.
11Is it worth upgrading from the previous generation?+
Consider upgrading to Vega 11CU 3400G if your current device no longer delivers the required FPS, memory capacity, or feature support. A gain below 15–20% is usually worth waiting for a price cut.