Threadripper Internal Configurations
The good news here is that AMD claims that Threadripper CPUs are at the top 5% of all Ryzen CPU dies, and that should mean that they have the best silicon in the batch and should clock higher. Threadripper's internal uArch is based on the same Zen micro architecture as is used in everything from Ryzen 3 CPUs to EPYC server CPUs, with a few exceptions when it comes to encryption units and the like.
However, the difference lies on the outside of the dies, and now the two dies are connected to each other and system components such as DRAM. AMD has incorporated different operating modes into the Ryzen Master software, which allows users to decide whether or not to put the CPU into a gaming mode, change how the dies interact with DRAM, and even offers a legacy mode to make the CPU like their Ryzen 7 counterparts but with quad-channel memory.
As I stated before, although the CPU has four silicon dies, only two are actually active or contain transistors (according to AMD they are not rejected EPYC parts), and these each has two CPU Core Complexes (CCX). Inside each die, the two CCX are connected by AMD's Infinity Fabric, and then each die is connected to each other through Infinity Fabric. AMD's Infinity Fabric operates at 102.22GB/s bi-directionally die to die, with near memory latency at 78ns and 133ns for far memory. AMD has made it possible to access memory differently to take advantage of bandwidth or latency.
You can choose within Ryzen Master to allow the CPU to operate in UMA mode (Distributed in the application) or NUMA mode (Local mode in the application). Distributed mode is the default operating mode, and it actually allows you to engage another mode called "Legacy Mode," which disables one die and allows one die to use quad channel memory. When in UMA mode, you get very wide DRAM access, but latency is increased while bandwidth is increased. In NUMA mode, DRAM accessed is close to each die, greatly reducing latency.
AMD's own benchmarking is quite close to the results I have seen, with UMA mode providing high bandwidth and NUMA providing better latency but slightly lower bandwidth.
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- Page 1 [Introduction, Specifications, and Pricing]
- Page 2 [Threadripper Internal Configurations]
- Page 3 [The CPU and Test Setup]
- Page 4 [Out of the Box Performance: CINEBENCH, wPrime, and AIDA64]
- Page 5 [Out of the Box Performance: Handbrake Video Transcoding, ScienceMark, and SuperPI]
- Page 6 [Out of the Box Synthetic Gaming Performance: UNIGINE and 3DMark]
- Page 7 [Out of the Box Gaming Performance: Resident Evil, Tomb Raider, GTA:V, Ashes of the Singularity]
- Page 8 [Overclocking and Power Consumption]
- Page 9 [What's Hot, What's Not & Final Thoughts]
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