SYSTEM ANALYZER

Rate My PC: AMD Ryzen 9 7900 + AMD Radeon RX 6400

Get a comprehensive performance analysis of your gaming rig with detailed benchmarks, bottleneck detection, and upgrade recommendations

Build Configuration

Select your components

PROCESSOR (CPU)

▼

GRAPHICS CARD (GPU)

▼

89 Score

Top 11% Ranking

89 / 100

HIGH-END

Power Build

Top 11% of systems. Excellent for 1440p Ultra or 4K High gaming.

1440p Ultra4K High

System Balance Analysis

CPU vs GPU performance ratio

Well Balanced

CPU

94%

GPU

83%

PROCESSOR

AMD Ryzen 9 7900

49,228 Benchmark Score

Top 6% Market Ranking

View Full Specs →

GRAPHICS CARD

AMD Radeon RX 6400

6,001 Benchmark Score

Top 17% Market Ranking

View Full Specs →

Market Position

How your build compares to others

Budget

0-30

Mid-Range

30-60

High-End

60-85

Enthusiast

85-100

Your Build

Game Performance Benchmarks

Real-world 4K FPS in popular titles

View All Games →

Performance Insights

Tips to maximize your system

Strong Performance

Excellent for 1440p gaming. Most games will run at high/ultra settings smoothly.

Compatible Games See what you can play Compare CPUs Find upgrades Compare GPUs Find upgrades

Performance Tiers Explained

90-100

Ultimate

4K Ultra gaming, VR ready, ray tracing enabled, professional workloads

4K 60+ FPS VR Ready

70-89

High-End

1440p Ultra or 4K High settings, excellent for modern AAA titles

1440p Ultra 4K High

50-69

Mid-Range

1080p Ultra or 1440p Medium, great value for most gamers

1080p Ultra 1440p Med

30-49

Entry Level

1080p Medium settings, suitable for eSports and older titles

1080p Med eSports

0-29

Legacy

Basic gaming, older titles, consider upgrading for modern games

720p-1080p Low Older Games

# AMD Ryzen 9 7900 + AMD Radeon RX 6400: A Productivity Titan Paired with an Entry-Level GPU

This pairing combines AMD's 12-core Zen 4 flagship mainstream processor with an entry-level Radeon RX 6400 GPU. The result is a system with exceptional CPU horsepower for multi-threaded workloads, but one where the graphics card is clearly the limiting factor for any gaming or GPU-accelerated task. The data shows a combined percentile of 63 across all desktop builds, which reflects the massive imbalance between the two components. This analysis is based entirely on the benchmark scores in the fact pack, and there are no measured FPS figures for this specific combination—all gaming discussion is estimated from the component benchmark data.

Upgrade Path and Platform

The AMD Ryzen 9 7900 uses the AMD Socket AM5 platform, which is the foundation for AMD's 7000 series desktop processors. This socket supports DDR5 memory exclusively, with a dual-channel memory bus that delivers 83.2 GB/s of bandwidth. The platform also includes support for ECC memory, which is a notable feature for workstation and small business reliability. PCIe Gen 5 is available with 24 lanes from the CPU, giving this build headroom for future high-bandwidth storage devices or expansion cards. The CPU's integrated Radeon Graphics provides a fallback display output, which means the system remains usable even if the discrete GPU is removed or fails.

The power supply headroom is dictated by the GPU's suggested PSU rating of 250 W, which is low by modern standards. The CPU has a 65 W TDP, so the combined power draw of this system stays modest. This means a sensible next upgrade could be a significantly more powerful graphics card without necessarily changing the power supply, as long as the new card's requirements stay within the existing PSU's capacity. The motherboard's AM5 socket also supports future Ryzen generations, so a CPU upgrade path exists beyond the 7900. For users who want more GPU performance, swapping the RX 6400 for a higher-tier card is straightforward, as the RX 6400 is a single-slot, low-power design with no external power connectors.

Benchmark Performance

The Ryzen 9 7900 posts impressive CPU benchmark scores across the board. In Cinebench R23, it achieves 24,776 in multicore and 1,966 in single-core tests. The Geekbench results show 17,726 in multicore and 2,495 in single-core. PassMark multithread score is 48,347, with a single-thread score of 4,130. The CPU's average benchmark score is 49,228, placing it in the 90th percentile among all CPUs. Its nearest rivals include the AMD Ryzen 7 PRO 5755G with a score of 49,196 (0.1% behind), the Intel Core i5-14600KF at 49,394 (0.3% ahead), the Intel Core Ultra 5 245 at 48,995 (0.5% behind), and the Intel Xeon Gold 5318H at 48,698 (1.1% behind). The 7900 essentially trades blows with these chips, sitting within a 1.1% band of all four.

The RX 6400, by contrast, has an average benchmark score of 6,001, placing it in the 35th percentile of all GPUs. Its closest rivals are the NVIDIA GeForce GTX 770M at 6,000 (0% delta), the NVIDIA RTX PRO 6000 Blackwell Server at 5,996 (0.1% behind), the AMD FirePro W4100 at 5,987 (0.2% behind), and the NVIDIA Quadro K4000M at 5,986 (0.3% behind). This GPU is effectively in a different performance class than the CPU—the CPU outpaces the GPU in raw benchmark averages by a factor of roughly 8.2x. The combined picture is clear: this system is built for CPU-bound productivity tasks, and the GPU is only adequate for basic display output and light gaming.

Usage Scenarios

High-refresh gaming: This is not a high-refresh gaming build. The RX 6400's PassMark G3D score of 7,673 and DirectX 12 score of 30 place it far below what modern titles require for high frame rates. The CPU's 3DMark single-thread score of 1,069 and 2-thread score of 2,067 are strong, but the GPU will bottleneck any gaming workload. Expect low settings and modest resolutions for playable frame rates.

Streaming: The CPU can handle streaming encoding easily. Its 24 threads and high multithread scores (Cinebench R23 multicore of 24,776 and PassMark multithread of 48,347) provide ample headroom for x264 encoding while gaming. However, the GPU's lack of dedicated encoder hardware and low compute scores mean GPU-accelerated streaming is not viable.

Video editing: CPU-based video editing and encoding will perform well. The 12 cores and 24 threads handle multi-track timelines and export tasks efficiently. The GPU's 4 GB VRAM and 128.0 GB/s bandwidth are sufficient for basic previews, but effects that rely on GPU acceleration will be slow.

3D rendering: CPU rendering is excellent on this system. The 3DMark max-thread score of 10,953 and Cinebench R23 multicore score of 24,776 indicate strong performance for render engines that scale across cores. GPU rendering is not viable—the RX 6400's FP32 of 3.565 TFLOPS is too low for serious GPU rendering workloads.

Software development: Compilation and build tasks benefit from the CPU's high multi-threaded performance. The PassMark data compression score of 577,847 and integer math score of 164,075 suggest fast code compilation and data processing. Single-thread performance is also solid, with a Geekbench single-core score of 2,495.

Student and office work: This system is overkill for typical office tasks. The CPU's performance is far beyond what word processing, spreadsheets, or web browsing require, but the GPU ensures smooth desktop rendering at standard resolutions. The low power draw (65 W CPU, 53 W GPU) keeps the system quiet and efficient for daily use.

Who Should Build It

This build targets users who prioritize CPU performance above all else. Content creators working with CPU-based rendering, video encoding, or data processing will find the 12-core Ryzen 9 7900 delivers outstanding performance. Software developers compiling large codebases will benefit from the high multithread scores. Students and office workers who need a responsive system for multitasking will find the 24 threads more than sufficient, though the GPU is overkill for basic tasks. Small business workstations that run ECC memory and need reliable CPU performance for databases or virtualization fit this build's profile.

Gamers at 1080p with low graphical expectations might find the RX 6400 usable for older or less demanding titles, but this is not a gaming-focused configuration. Users who want to play modern AAA games at high settings should look elsewhere. The target user is someone who values the CPU's 90th percentile performance ranking and accepts the GPU's 35th percentile as a placeholder for future upgrades.

Gaming Performance

No measured FPS rows exist for this exact combination. All gaming frame rates discussed here are estimates based on the benchmark scores of the CPU and GPU. The RX 6400's PassMark G3D score of 7,673 and DirectX 11 score of 70 indicate it can handle esports titles and older games at 1080p with medium settings. The DirectX 12 score of 30 suggests modern AAA games will struggle, likely requiring low settings and potentially resolutions below 1080p to maintain playable frame rates.

The CPU's strong single-thread performance (3DMark single-thread score of 1,069 and PassMark single-thread of 4,130) ensures it will not bottleneck the GPU in most gaming scenarios. However, the GPU's 4 GB VRAM and 64-bit memory bus with 128.0 GB/s bandwidth are limiting factors for modern game textures and geometry. Expect frame rates in the range of 30-60 FPS for older titles at 1080p low, dropping to below 30 FPS for current-generation AAA games. The 3DMark Steel Nomad DX12 score of 176 corroborates this—this GPU is not designed for demanding gaming.

GPU Analysis

The AMD Radeon RX 6400 uses the Navi 24 chip built on a 6 nm process at TSMC, containing 5,400 million transistors on a 107 mm² die. It features 768 shading units, 48 TMUs, and 32 ROPs, with 12 ray accelerators (RT cores) for ray tracing support. The GPU has no tensor cores, as it is an RDNA 2.0 architecture part. Memory is 4 GB of GDDR6 on a 64-bit bus, providing 128.0 GB/s of bandwidth. Clocks are 1923 MHz base, 2039 MHz game, and 2321 MHz boost, with memory running at 2000 MHz (16 Gbps effective).

The benchmark scores reflect its entry-level positioning. Geekbench OpenCL score is 32,011, while Vulkan score is 16,372. PassMark GPU compute score is 2,812. The pixel rate of 74.27 GPixel/s and texture rate of 111.4 GTexel/s are modest by contemporary standards. FP32 performance of 3.565 TFLOPS and FP16 of 7.130 TFLOPS place it below many integrated graphics solutions. The GPU's percentile rank of 35 among all GPUs and its close rivalry with mobile and workstation parts from years ago (GTX 770M, Quadro K4000M) show this is a basic display adapter rather than a performance GPU. For rendering, the 12 RT cores provide ray tracing capability, but the raw compute power is insufficient for meaningful ray-traced workloads.

Balance and Bottleneck

The balance between the Ryzen 9 7900 and RX 6400 is heavily skewed toward the CPU. The CPU's average benchmark score of 49,228 is nearly 8.2 times higher than the GPU's 6,001. This means the GPU is the bottleneck in any graphics-intensive task, including gaming, GPU rendering, and GPU-accelerated video effects. The CPU will sit idle waiting for the GPU to complete work in these scenarios.

Conversely, in CPU-bound workloads like compilation, data compression, or CPU rendering, the GPU has no impact, and the CPU's full performance is available. The 3DMark thread scaling results (2,067 for 2 threads, 7,454 for 8 threads, 10,953 for max threads) show the CPU scales well with thread count, which is ideal for multi-threaded productivity. The FPS scaling in gaming would be entirely dictated by the GPU, with the CPU providing no meaningful uplift beyond what the RX 6400 can deliver.

The practical bottleneck is the GPU's 4 GB VRAM and 64-bit memory bus. Even if the CPU were weaker, the RX 6400's memory subsystem would cap performance in modern games. For a balanced system, a user would pair this CPU with a GPU in a higher performance class, but the current configuration is suitable for CPU-centric workloads where the GPU is merely an output device.

FAQ

Q: Does the Ryzen 9 7900 support DDR4 memory?

A: No. The CPU supports DDR5 memory only, with a dual-channel bus providing 83.2 GB/s of bandwidth. It also supports ECC memory.

Q: What is the socket and platform for this CPU?

A: The Ryzen 9 7900 uses AMD Socket AM5, which is the platform for AMD's 7000 series desktop processors. It offers PCIe Gen 5 with 24 CPU lanes.

Q: How does the RX 6400 compare to its nearest GPU rivals?

A: The RX 6400 has an average benchmark score of 6,001, placing it in the 35th percentile. It is effectively tied with the NVIDIA GeForce GTX 770M (6,000, 0% delta) and slightly ahead of the NVIDIA RTX PRO 6000 Blackwell Server (5,996, 0.1% delta).

Q: What is the power consumption and PSU requirement for the GPU?

A: The RX 6400 has a 53 W TDP and requires a suggested power supply of 250 W. It has no power connectors, drawing power solely from the PCIe slot.

Q: Does the RX 6400 support ray tracing?

A: Yes, it has 12 ray accelerators (RT cores) on the RDNA 2.0 architecture. However, its low FP32 throughput of 3.565 TFLOPS limits practical ray tracing performance.

Q: What is the CPU's performance percentile and nearest rivals?

A: The Ryzen 9 7900 ranks in the 90th percentile among all CPUs with an average score of 49,228. Its nearest rivals are the AMD Ryzen 7 PRO 5755G (49,196, 0.1% behind), Intel Core i5-14600KF (49,394, 0.3% ahead), Intel Core Ultra 5 245 (48,995, 0.5% behind), and Intel Xeon Gold 5318H (48,698, 1.1% behind).

Q: Is this system good for gaming at high refresh rates?

A: No. The RX 6400's benchmark scores (PassMark G3D of 7,673, DirectX 12 of 30) indicate it cannot deliver high frame rates in modern games. The CPU is capable, but the GPU severely limits gaming performance.

CPU Analysis

The AMD Ryzen 9 7900 is a 12-core, 24-thread processor from the 7000 series, built on the Zen 4 architecture with the Raphael codename. It uses a 5 nm process at TSMC, containing 13,140 million transistors across a dual-chiplet design with each die measuring 71 mm². The base clock is 3.70 GHz with a boost clock of 5.40 GHz, and the TDP is 65 W. The cache hierarchy includes 64 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3 cache. The multiplier is unlocked, allowing overclocking, and the CPU was released in January 2023 with a launch MSRP of $429.

Benchmark results show strong performance across all thread counts. The 3DMark scores scale from 1,069 single-thread to 10,953 max-threads, indicating efficient multi-threading. Cinebench R23 results are 24,776 multicore and 1,966 single-core, while Geekbench shows 17,726 multicore and 2,495 single-core. PassMark tests reveal specific strengths: data compression at 577,847, integer math at 164,075, and floating-point math at 97,943. The extended instructions score is 42,253, and data encryption is 34,708.

In real workloads, these scores translate to excellent productivity performance. The 24 threads handle heavily parallel tasks like video encoding and 3D rendering with ease. Single-thread scores are also strong, benefiting everyday responsiveness and lightly-threaded applications. The CPU's 90th percentile ranking places it among the top tier of desktop processors, and its nearest rivals are all high-end chips from both AMD and Intel. The 65 W TDP is notably low for this level of performance, making it an efficient choice for workstations where power draw and heat are concerns. The integrated Radeon Graphics provides a backup display output, though the discrete RX 6400 will be the primary GPU in this build.

Rate My PC: AMD Ryzen 9 7900 + AMD Radeon RX 6400

Power Build

System Balance Analysis

AMD Ryzen 9 7900

AMD Radeon RX 6400

Market Position

Game Performance Benchmarks

Cyberpunk 2077

Red Dead Redemption 2

Microsoft Flight Simulator

Control

Call of Duty: Warzone

Fortnite

Performance Insights

Strong Performance

Performance Tiers Explained

Ultimate

High-End

Mid-Range

Entry Level

Legacy

Upgrade Path and Platform

Benchmark Performance

Usage Scenarios

Who Should Build It

Gaming Performance

GPU Analysis

Balance and Bottleneck

FAQ

CPU Analysis

4K Gaming Performance

Cyberpunk 2077

Red Dead Redemption 2

Microsoft Flight Simulator

Control

Call of Duty: Warzone

Fortnite

1440p Gaming Performance

Cyberpunk 2077

Red Dead Redemption 2

Microsoft Flight Simulator

Control

Call of Duty: Warzone

Fortnite

1080p Gaming Performance

Cyberpunk 2077

Red Dead Redemption 2

Microsoft Flight Simulator

Control

Call of Duty: Warzone

Fortnite

Related Processors

Related Graphics Cards

Compare Your CPU

Compare Your GPU

Related PC Builds

Same CPU with Different GPUs

Same GPU with Different CPUs

Other Popular Builds