EPYC 7643
AMD
PassMark
76,050
MSRP
$4995
AVG Price
$2750
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Overview
The EPYC 7643 is manufactured by AMD. It was released in 15 March 2021 (4 years ago). It is based on the Milan (2021−2023) architecture. It features 48 cores and 96 threads. Base frequency is 2.3 GHz, with boost up to 3.6 GHz. L3 cache: 256 MB (total). L2 cache: 512 kB (per core). Built on 7 nm+ process technology. Socket: SP3. Thermal design power (TDP): 225 Watt. Memory support: DDR4-3200. Passmark benchmark score: 76,050 points. Launch price was $4,995.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar EPYC 7643
FPS Benchmarks
Predicted performance for EPYC 7643 across popular games. Tested paired with RTX 4090 to isolate CPU performance.
Call of Duty: Black Ops 6
Civilization VI
Counter-Strike 2
Cyberpunk 2077
Final Fantasy XIV
Garry's Mod
Hearts of Iron IV
League of Legends
Marvel Rivals
Path of Exile 2
Technical Analysis
Detailed breakdown of EPYC 7643 specifications and capabilities.
Processing Power
The EPYC 7643 is a 48-core / 96-thread processor based on the Milan (2021−2023) architecture, manufactured on a 7 nm+ process node. It reaches a maximum boost clock of 3.6 GHz from a base frequency of 2.3 GHz— higher boost clocks directly translate to better single-threaded performance and responsiveness in gaming. With a massive 256 MB (total) L3 cache (3D V-Cache technology), this processor has a significant gaming advantage — the large cache drastically reduces memory latency in game engines., plus 512 kB (per core) of L2 cache and 64 kB (per core) of L1 cache per core. In the PassMark benchmark (a comprehensive multi-threaded test), it scores 76,050, placing it in the Enthusiast performance tier as a Aging generation product. Geekbench 6 single-core (the most relevant metric for gaming FPS) records 1,671, while multi-core reaches 15,000.
| Specification | EPYC 7643 |
|---|---|
| Cores / ThreadsPhysical/logical processing units | 48C / 96T |
| Max Boost ClockPeak single-core speed under boost | 3.6 GHz |
| Base ClockGuaranteed minimum operating frequency | 2.3 GHz |
| ArchitectureCPU microarchitecture design | Milan (2021−2023) |
| Process NodeFabrication technology — smaller = more efficient | 7 nm+ |
| L3 CacheShared cache — reduces memory latency for all cores | 256 MB (total) |
| L2 CachePer-core fast cache for frequently accessed data | 512 kB (per core) |
| L1 CacheUltra-fast per-core cache | 64 kB (per core) |
| Die SizePhysical silicon area of the processor | 8x 81 mm2 |
| Transistor CountMore transistors = more capabilities | 33,200 million |
| 64-bit Support | Yes |
| Windows 11 Compatible | Yes |
| PassMark ScoreOverall multi-threaded benchmark score | 76,050 |
| Geekbench 6 SingleSingle-core performance — most relevant for gaming | 1,671 |
| Geekbench 6 MultiMulti-core parallel workload performance | 15,000 |
Memory & Platform
The EPYC 7643 fits into the SP3 socket and supports PCIe 4.0 with 128 total PCIe lanes for expansion cards and storage. It supports DDR4-3200 memory at speeds up to DDR4-3200 (faster RAM improves bandwidth-sensitive workloads), with a maximum capacity of 4 TB across 8 channels (dual-channel doubles bandwidth). It supports ECC memory, providing error-correcting capabilities — essential for mission-critical workloads and servers. Integrated graphics: None — allows display output without a dedicated GPU, useful for troubleshooting and light tasks.
| Specification | EPYC 7643 |
|---|---|
| TypeDesktop or Laptop processor | server |
| SeriesProduct family | AMD EPYC |
| SocketMotherboard socket required | SP3 |
| PCIe GenerationPeripheral interconnect speed — affects GPU and SSD bandwidth | PCIe 4.0 |
| PCIe LanesTotal available lanes for GPUs, NVMe drives, and expansion | 128 |
| RAM TypeSupported memory standard | DDR4-3200 |
| Max RAM SpeedMaximum officially supported memory frequency | DDR4-3200 |
| Max RAM CapacityMaximum installable memory | 4 TB |
| RAM ChannelsDual-channel doubles bandwidth vs single-channel | 8 |
| ECC SupportError-Correcting Code memory — prevents data corruption | Yes |
| Integrated GPUBuilt-in graphics processor | None |
| Compatible ChipsetsMotherboard chipsets that support this CPU | SP3 |
| Max CPUs in ConfigMulti-socket support for servers | 2 |
Advanced Features
The EPYC 7643 is primarily designed for Server. Virtualization: AMD-V — enables running virtual machines efficiently (important for development and server workloads). Its primary market competitor is the EPYC 7443P.
| Specification | EPYC 7643 |
|---|---|
| Primary Use CaseIntended workload category | Server |
| OverclockingWhether CPU clock can be manually increased | 🔒 Locked |
| AVX-512Advanced vector instructions for AI/ML workloads | ❌ Not Supported |
| VirtualizationHardware-assisted virtualization technology | AMD-V |
| Direct CompetitorMarket equivalent from rival manufacturer | EPYC 7443P |
Power & Cooling
The EPYC 7643 has a rated TDP (Thermal Design Power) of 225 Watt — this indicates the amount of heat generated under sustained load and determines what cooling solution is needed. No stock cooler is included — you will need to purchase an aftermarket cooler separately. Recommended cooling: AIO 360mm+.
| Specification | EPYC 7643 |
|---|---|
| TDPThermal Design Power — heat output under sustained workload | 225 Watt |
| Included CoolerStock cooler bundled in the box | No |
| Recommended CoolerSuggested aftermarket cooling solution | AIO 360mm+ |
Value Analysis
At an average price of $2,750 (MSRP: $4995), the EPYC 7643 delivers 28 PassMark points per dollar. Performance ranking position: #71 out of all indexed processors.
| Specification | EPYC 7643 |
|---|---|
| MSRPManufacturer's Suggested Retail Price | $4995 |
| Avg Price (30d)Average market price over the last 30 days | $2750 |
| Launch PriceOriginal retail price at launch | $4,995 |
| Performance RankPosition in overall performance ranking | #71 |
| Release DateLaunch date | 15 March 2021 (4 years ago) |
| Release Year | 2021 |
| DesignerArchitecture designer (e.g. Intel, AMD) | AMD |
| ManufacturerFabrication foundry (e.g. TSMC) | TSMC |
Similar Performance
Processors with benchmark scores closest to the current hardware, grouped by manufacturer.
Intel (11)
AMD (6)
Our Recommendation for EPYC 7643
Suggested pairings based on performance balance
Minimum (Avoid Bottleneck) (12)
Recommended (Balanced) (12)
High-End (Max Performance) (12)
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