InMotion Hosting’s Extreme Dedicated Server is the company’s first AMD-based managed server offering, and the choice of processor matters more than the brand name suggests. The AMD EPYC 4545P, built on AMD’s Zen 4 architecture, offers architectural characteristics that directly benefit database, analytics, and memory-intensive workloads commonly found in dedicated server infrastructure. Understanding what those characteristics are, and which workloads they benefit most, helps you evaluate whether the Extreme tier’s specifications match your actual requirements.
EPYC 4545P Specifications
The 65W TDP is notable for a 16-core server processor. Previous-generation Intel Xeon Silver processors at comparable core counts ran 105-150W TDP. Lower power consumption at equivalent compute capacity translates directly to lower data center power costs, which is relevant for colocation deployments and contributes to InMotion’s ability to offer this configuration at competitive pricing.
Zen 4 Architecture Advantages
L3 Cache: 64MB and Why It Matters
The EPYC 4545P’s 64MB L3 cache is large by server processor standards. For database workloads specifically, L3 cache size determines how much of the working dataset stays in cache between queries. A frequently-accessed index or hot partition of a PostgreSQL table that fits in L3 cache is served in 4-40 nanoseconds. The same data accessed from DDR5 RAM takes 60-80 nanoseconds.
That difference compounds across millions of queries per day. Database-heavy workloads, OLTP transaction processing, web application backends, and ERP systems all see tangible latency benefits from a large L3 cache. This is one reason the EPYC 4545P performs well on database benchmarks relative to processors with more cores but smaller per-core cache allocations.
DDR5 Memory Controller
The EPYC 4545P’s integrated DDR5 memory controller supports 4-channel DDR5 at 4800 MT/s, providing a theoretical memory bandwidth of approximately 153 GB/s. DDR4 at the same channel count maxes out around 100-110 GB/s. For memory-bandwidth-bound workloads, that 40% theoretical bandwidth increase translates to meaningful real-world performance differences.
The workloads that benefit most from higher memory bandwidth: large in-memory database buffer pools (Redis, Memcached, PostgreSQL with large shared_buffers), scientific computing with large matrix operations, numerical simulation, and analytics workloads scanning large datasets that stay in RAM. For CPU-bound workloads like web request processing or small-data computation, memory bandwidth is rarely the bottleneck.
AVX-512 Instruction Set
AVX-512 (Advanced Vector Extensions 512-bit) processes 512 bits of data per clock cycle for floating-point operations, double the 256 bits that AVX-256 handles. For applications built to use AVX-512, this doubles floating-point throughput per clock cycle.
Software that directly benefits from AVX-512 on the EPYC 4545P:
NumPy / SciPy: Compiled with Intel MKL or OpenBLAS AVX-512 support, matrix operations run at double the throughput vs. AVX-256.
TensorFlow / PyTorch (CPU): Both frameworks detect and use AVX-512 for CPU tensor operations. CPU inference throughput for small neural networks increases meaningfully.
Video encoding (FFmpeg): AVX-512-optimized codecs (AV1, H.265) encode faster per core on AVX-512 capable processors.
Database compression: PostgreSQL and MySQL use SIMD instructions for data compression; AVX-512 accelerates these operations.
Cryptography: AES-NI and SHA acceleration on EPYC hardware reduces TLS handshake overhead for high-connection-rate web servers.
Single-Core vs. Multi-Core Performance
When Single-Core Speed Matters
The EPYC 4545P’s 4.9 GHz boost clock is competitive with general-purpose server workloads. Single-core performance matters most for:
PHP-FPM request processing (each request runs in a single worker process)
Redis command processing (Redis is single-threaded for command execution)
Sequential database queries that cannot be parallelized
Game server logic (most game engines are single-threaded for physics and game state)
Legacy applications written before multi-threading was common
For these workloads, the boost clock up to 4.9 GHz ensures individual operations complete quickly. The Zen 4 architecture’s per-core IPC (Instructions Per Clock) improvements over Zen 3 make the effective single-threaded performance higher than the clock speed alone suggests.
Where 16 Cores Make the Difference
Workloads that utilize multiple cores simultaneously see the full benefit of 16-core / 32-thread processing:
Parallel compilation (make -j16): full codebase rebuilds in a fraction of the single-core time
Web servers under concurrent load (Nginx worker processes, PHP-FPM pools)
Database query parallelism (PostgreSQL parallel query plans, MySQL parallel replication)
Video transcoding (FFmpeg with multiple parallel encode jobs)
Machine learning: XGBoost, LightGBM, and scikit-learn all use OpenMP for multi-core training
Container orchestration: running 16+ containerized services simultaneously
EPYC 4545P vs. Previous-Generation Intel Xeon for Common Workloads
ECC RAM: Why It Belongs in This Analysis
The Extreme Dedicated Server ships with DDR5 ECC RAM, not standard DDR5. This is a specification that matters for production workloads in ways that go beyond typical hosting comparisons.
ECC (Error-Correcting Code) RAM detects and corrects single-bit memory errors automatically and detects (but cannot correct) multi-bit errors. DRAM bit errors occur at a rate of roughly 1 error per 1GB of RAM per year in non-ECC consumer-grade memory, per industry studies. For a 192GB system, that is roughly 192 potential bit errors per year.
A single-bit error in a database buffer pool causes data corruption. In a financial application, that corruption may not be immediately visible but surfaces later as calculation errors or data integrity failures. ECC RAM silently corrects these errors before they propagate. This is standard equipment in enterprise server hardware for exactly this reason.
How InMotion Positions the EPYC 4545P
InMotion is one of the first managed hosting providers to offer the AMD EPYC 4545P in a fully managed dedicated server configuration at this price point. The positioning is specific: managed dedicated servers at comparable memory capacity (192GB) from enterprise hosting providers have historically run $600-1,200 per month. The Extreme tier delivers those specifications with InMotion Hosting’s APS management layer included.
The EPYC 4545P’s 65W TDP is part of what makes that pricing work. Lower power consumption at the data center level allows InMotion to offer higher compute density at managed pricing that competes with do-it-yourself bare metal in colocation facilities.
Workloads Best Matched to the EPYC 4545P
Large database deployments: 192GB DDR5 ECC + 64MB L3 cache is purpose-built for large MySQL, PostgreSQL, and MongoDB deployments where the working dataset fits in memory.
Memory-intensive analytics: Spark, in-memory data processing, and large dataset operations benefit from DDR5 bandwidth and 192GB capacity.
Parallel build and CI systems: 16 cores handle parallel test execution and Docker builds without queuing.
High-concurrency web applications: 16 cores sustain hundreds of concurrent PHP-FPM workers or Node.js cluster processes.
Machine learning (CPU-bound): AVX-512 + 16 cores accelerates XGBoost, scikit-learn, and CPU inference.
Workloads where the EPYC 4545P’s specific advantages matter less: purely single-threaded applications where the boost clock (4.9 GHz) is competitive but not dramatically different from alternatives, and GPU-dependent workloads where the CPU is not the bottleneck.