Latest AMD Ryzen 9000 Processor Leak Unveils Doubling of Cache Bandwidth in Comparison to Ryzen 7000
An upcoming release from AMD, the Ryzen 9000 series processors, is set to debut next month on the AM5 platform. Featuring the innovative Zen 5 core architecture, these CPUs showcase an overhauled front-end, broader execution capabilities, and an enhanced memory sub-system. An alleged sample of a Ryzen 5 9600X ES indicates a significant surge in the L1 and L2 cache bandwidth when contrasted with the 7600X. The cache read and write speeds are almost twice as rapid as the Zen 4 chips, signaling substantial modifications to the memory subsystem and the Infinity Fabric frequencies.
Highlighted below are the summarized read, write, and copy speeds for L1 and L2 caches in the Ryzen 5 9600X (Zen 5) compared to the average R5 7600X (Zen 4) sample.
AMD Ryzen 9000 (Zen 5) versus Ryzen 7000 (Zen 4) Cache Speeds
| SKU | Read Speed (GB/s) | Write Speed (GB/s) | Copy Speed (GB/s) | Latency (ns) |
|---|---|---|---|---|
| Ryzen 9600X (L1) | 3756.4 | 1884.4 | 3755.9 | 0.8 |
| Ryzen 7600X (L1) | 2029.6 | 1026.9 | 2048.1 | 0.7 |
| Ryzen 9600X (L2) | 1874.6 | 1795.1 | 1859.7 | 2.8 |
| Ryzen 7600X (L2) | 1028.5 | 1017 | 1017.6 | 2.6 |
The Ryzen 5 9600X showcases a remarkable 80-90% increase in L1 and L2 cache bandwidths, accompanied by slightly elevated latencies. The unchanged L3 bandwidth suggests that improvements in inter-core bandwidth or latency are unlikely. The Infinity Fabric clock remains at a constant 3 GHz, similar to most Ryzen 7000 EXPO profiles.
Slight Enhancement in CPU-Z IPC
A CPU-Z benchmark was executed on an overclocked Ryzen 5 9600X sample running at 5.7 GHz. Despite a robust +300 MHz overclock, it only achieves a 13-14% advancement in single and multi-core performance over the 7600X.
| Ryzen 5 7600X | Ryzen 5 9600X ES | Ryzen 5 9600X OC | |
|---|---|---|---|
| 1T | 764 | 776 | 871 |
| nT | 6190 | 6201 | 7096 |
Due to its absence in AMD’s Zen 5 IPC uplift chart and a meager 1% improvement per the Zen 4 IPC chart, the limited boost in CPU-Z numbers should not come as a surprise. Various reports have exposed CPU-Z as a fundamentally flawed benchmark, so exercise caution when interpreting the results.
Reference: HXL.
