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AMD Ryzen Threadripper vs. Intel Core i9-7900X: The fastest chips money can buy
By Koh Wanzi - 20 Aug 2017,10:00am

Gaming benchmarks & overclocking

Gaming benchmarks and overclocking

 

3DMark (2013)

The synthetic 3DMark benchmark tests graphics and computational performance at different resolutions, starting at 1080p and going all the way up to 4K. A series of two graphics test, one physics test, and then a combined test stresses your hardware in turn to assess its performance. And because of the physics test that keeps the GPU load low while running gameplay physics simulations on the CPU, all three 3DMark Fire Strike tests scores also include an element of CPU performance.

We’ve also teased out the Physics and CPU scores for the Fire Strike and Time Spy tests and compiled them in separate tables to give a better idea of how each processor performed.

The Threadripper 1950X was neck-and-neck with the Core i9-7900X across all the benchmarks, an encouraging sign given the initially lackluster 1080p gaming performance of the Ryzen 7 1800X. The 1920X was not far behind, and it became more competitive with the Core i9-7900X as the benchmarks moved to more graphically bound 1440p and 4K scenes.

A look at the Physics and Time Spy CPU scores shows the Threadripper chips coming very close to the Intel Core i9-7900X as well, with the 1950X even outstripping the Core i9 in the Physics test.

The 12-core 1920X deserves praise as well, as it offers very competitive performance for just US$799.

 

Ashes of the Singularity: Escalation

Ashes of the Singularity: Escalation was one of the first games to be updated with optimizations for Ryzen, and both Threadripper processors come very close to challenging the Intel Core i9-7900X in DirectX 12 mode at 1080p.

Ashes of the Singularity is one of the few CPU-bound games out there, if you’re playing on lower resolutions and settings that is. In DirectX 11 mode and High settings, the two Threadripper processors lag behind the Core i9-7900X by 14 to 20 per cent.

However, this gap narrows as you step up to Crazy settings and 1440p and 4K resolutions. The performance differential narrows even further in DirectX 12 mode, but that’s likely because the low-level API helps alleviate CPU bottlenecks by enabling it to process draw calls more efficiently, which means that the GPU is now the limiting factor.

In the CPU-focused benchmark, the Core i9-7900X still has an advantage, although the Threadripper 1950X isn’t that far behind.

 

Deus Ex: Mankind Divided

In Deus Ex: Mankind Divided, the limitations of the Threadripper chip become apparent in the less demanding graphical settings as well, where the CPU is the one holding things up.

In fact, the Threadripper 1950X lags slightly behind the 1920X, so it may be that clock speeds matter most here, which would explain the strong performance of the Core i7-7700K. At 1080p and High settings, the Core i9-7900X is a good 21 per cent quicker than the 1950X.

Moving to DirectX 12 actually brings about a performance drop across the board, but it brings out the performance differentials between CPUs, especially at a 1080p resolution. The quad-core Core i7-7740X and Core i7-7700K did best here, and this is one example of the many games that don’t yet benefit from having a ton of cores and threads.

 

Overclocking

We used AMD’s RyzenMaster utility to overclock the Threadripper processors. This table below summarizes the clock speeds, the voltages we used to achieve them, and the respective performance gains.

Overclocking also disables the 4-core XFR boost, or Turbo Boost on Intel’s end, so the speeds won’t ramp up beyond that.

The Threadripper 1950X posted a very nice improvement of nearly 12 per cent, even though we were only able to achieve a clock speed of 4.025GHz, which is below the top XFR speed of 4.2GHz. However, XFR doesn’t apply across all cores ‒ AMD is quoting a 4-core boost to 4.2GHz ‒ so the overclocked chip has a greater proportion of the cores operating at a higher frequency than they would otherwise be.

We were able to hit a higher clock of 4.25GHz with the 1920X, and that produced a decent 10 per cent jump in performance.

The Core i9-7900X similarly managed a nearly 12 per cent increase, even though the speed topped out at a mere 4.5GHz. That’s where the upper range of the chip’s Turbo Boost Max 3.0 technology is as well, which explains why there’s barely any change in the single-threaded scores in Cinebench R15.

We didn’t have a custom liquid cooling loop to really push the chips, but the consensus among reviewers seems to be that 5.0GHz mark is nearly impossible for Skylake-X without some crazy cooling, which may be a bit of a disappointment for those looking to squeeze out more performance.

  CPU (Overclocked) BCLK Vcore CPU Core Ratio Memory frequency
AMD Ryzen Threadripper 1950X (3.4GHz, 32MB L3 cache) 4.025GHz 100MHz 1.4V Auto 2,666MHz
AMD Ryzen Threadripper 1920X (3.5GHz, 32MB L3 cache) 4.25GHz 100MHz 1.3875V Auto 2,666MHz
Intel Core i9-7900X (3.3GHz, 13.75MB L3 cache) 4.5GHz 100MHz 1.22V 45 2,666MHz
Intel Core i7-7740X (4.3GHz, 8MB L3 cache) 5.08GHz 106MHz 1.36V 48 2,650MHz
Intel Core i7-6950X (3.0GHz, 25MB L3 cache) 4.28GHz 102MHz 1.38V 42 2,448MHz
Intel Core i7-7700K (4.2GHz, 8MB L3 cache) 5.04GHz 112MHz 1.38V 42 2,464MHz
AMD Ryzen 1800X (3.6GHz, 16MB L3 cache) 4.05GHz 100MHz 1.4V 36 2,666MHz

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