Everyone wants a fast processor. The ability to get more stuff done is one of a number of guiding principles of business. However, business also needs consistency, safety and security, which is why having enterprise-class processors is often a requirement in the back-end infrastructure. These processors, with lots of cores, aren’t as fast as consumer processors, so it becomes a tussle whether it makes sense to go fast without security, or to play it safe with a proven platform. With AMD’s new 7F processors, the aim is to provide that proven platform with super-fast cores with lots of cache. We’ve got the 7F52 in for testing today.

The Enterprise Market Wants It All

The nature of enterprise processors in recent generations has tended towards more cores and more cache. As power budgets have increased, in order to ensure stability and get the best efficiency points, the solution has been to add more cores. However, there are still markets that want high frequency components, and quite often users will look at consumer hardware, which doesn’t offer the trimmings of the enterprise world, such as ECC memory, RAS features, management, and high-speed IO. We’ve seen OEMs build servers on super rare ‘consumer-grade’ processors, like the auction-only 5 GHz 14-core parts that offer the peak of performance, but fall down on basic enterprise features, such as ECC memory.

To that end, AMD’s Enterprise division has been developing some high-frequency processors within its EPYC line of hardware to address this market. We saw with the first generation ‘Naples’ EPYC processors AMD come out with a special EPYC 7371 processor, which offered 16 cores but had +700 MHz on the base frequency and +900 MHz on the turbo frequency compared to the next best 16-core part, and the tradeoff was only +30 W of power and paying a bit extra. At the time the EPYC 7371, which was launched several months after the rest of the product line, was a test run for what is this new line of 7F ‘high frequency’ processors.

AMD 7F and 7H: Targeting High Performance

The best way to consider AMD’s EPYC processor line, especially for the second generation ‘Rome’ hardware, is in four segments.

First is the main stack. These are the regular processors for the majority of the market, from the 7252 with eight cores all the way up to the 7742 with 64 cores. These are all dual-socket compatible, and are anywhere from 155 W to 225 W (except the 7252 and 7262 which are 120 W).

AMD EPYC 7002 'Rome' Processors (2P)
  Cores
Threads
Frequency (GHz) L3 TDP Price
Base Max
EPYC 7742 64 / 128 2.25 3.40 256 MB 225 W $6950
EPYC 7702 64 / 128 2.00 3.35 256 MB 200 W $6450
EPYC 7642 48 / 96 2.30 3.20 256 MB 225 W $4775
EPYC 7552 48 / 96 2.20 3.30 192 MB 200 W $4025
EPYC 7542 32 / 64 2.90 3.40 128 MB 225 W $3400
EPYC 7502 32 / 64 2.50 3.35 128 MB 200 W $2600
EPYC 7452 32 / 64 2.35 3.35 128 MB 155 W $2025
EPYC 7402 24 / 48 2.80 3.35 128 MB 155 W $1783
EPYC 7352 24 / 48 2.30 3.20 128 MB 180 W $1350
EPYC 7302 16 / 32 3.00 3.30 128 MB 155 W $978
EPYC 7282 16 / 32 2.80 3.20 64 MB 120 W $650
EPYC 7272 12 / 24 2.90 3.20 64 MB 155 W $625
EPYC 7262 8 / 16 3.20 3.40 128 MB 120 W $575
EPYC 7252 8 / 16 3.10 3.20 64 MB 120 W $475

Second are the single socket processors. These are variants of the main stack but designated with a P at the end, as these are built for systems that only require a single processor. The benefit here is that the P processors are actually cheaper ($2600 for the 32-core 7502 compared to $2300 for the 7502P) if the customer can guarantee they never need a dual socket design. These also go from 8 cores all the way up to 64 cores.

AMD EPYC 7002 Rome Processors (1P)
  Cores
Threads
Frequency (GHz) L3 TDP Price
Base Max
EPYC 7702P 64 / 128 2.00 3.35 256 MB 200 W $4425
EPYC 7502P 32 / 64 2.50 3.35 128 MB 200 W $2300
EPYC 7402P 24 / 48 2.80 3.35 128 MB 200 W $1250
EPYC 7302P 16 / 32 3.00 3.30 128 MB 155 W* $825
EPYC 7232P 8 / 16 3.10 3.20 32 MB 120 W $450
*170W TDP mode also available

Third is the 7H family of processors, which as it stands only has one member right now. This was launched a couple of months after the first two segments, and the ‘H’ stands for High Performance Computing. The power limits of this chip has increased up to 280 W, and the goal is to drive a higher sustained frequency than the regular parts. For example, the 7742 has a base frequency of 2.25 GHz at 225W, but the 7H12 has a base frequency of 2.60 GHz at 280 W. The 7H processors aren’t on general retail as far as we can tell, but specific customers can request them.

AMD EPYC 7H Rome Processors (1P)
  Cores
Threads
Frequency (GHz) L3 TDP Price
Base Max
EPYC 7H12 64 / 128 2.60 3.30 256 MB 280 $?

Fourth is the newest set of hardware, the 7F family. The F in this case is for Frequency, and these parts are spiritual successors to the 7371 in the last generation: a lot more base frequency and a lot higher turbo for the consumer to use. AMD is also equipping these processors with lots of cache, so the cache per core can effectively quadruple.

There are three members to the Rome 7F family:

AMD EPYC 7F Rome Processors (1P)
  Cores
Threads
Frequency (GHz) L3 TDP Chiplets Cores
per
CCX
Price
Base Max
EPYC 7F72 24 / 48 3.20 3.70 192 MB 240 W 6 2 $2450
EPYC 7F52 16 / 32 3.50 3.90 256 MB 240 W 8 1 $3100
EPYC 7F32 8 / 16 3.70 3.90 128 MB 180 W 4 1 $2100

These processors do look a little confusing.

For the 8 core 7F32 and the 16 core 7F52, AMD is enabling 1 core per CCX, or 2 cores per chiplet, which means the equivalent of 16 MB of L3 cache per core. This is four times as much as what any other AMD EPYC processor gets.

The 24 core 7F72 is cheaper than the 16 core, as AMD is adjusting the level of cache on offer here to 192 MB. This means that this processor only has six of the eight chiplets active, and each CCX will have two cores active (6 chiplets * 2 CCX per chiplet * 2 cores per CCX = 24). The frequency is a little bit lower because of the increased active core density, so along with the decreased cache, AMD felt the need to price this one below that of the 7F52.

For this review, we’re testing the 7F52 processors. Compared to the base 7302 16-core that AMD offers, this means another +500 MHz on the base frequency, and +600 MHz on the turbo frequency, but also going up from 155 W to 225 W.

Naturally some of the key comparison points for the 7F52 CPU are going to be equivalent 16-core CPUs from Intel, such as the new Xeon Gold 6226R, or comparisons to 28/32 core options from both Intel and AMD.

7F52 2P Comparison Points
AMD
7F52 (2P)
AMD
7601
AnandTech Intel
8280
Intel
6226R (2P)
2 x 16 / 32 32 / 64 Cores / Threads 28 / 56 2 x 16 / 32
3500 2200 Base Frequency 2700 2900
3900 3200 Turbo Frequency 4000 3900
2 x 256 MB 64 MB L3 Cache 38.5 MB 2 x 22 MB
DDR4-3200 DDR4-2666 DRAM Support DDR4-2933 DDR4-2933
2 TB / socket 2 TB DRAM Capacity 1 TB 1 TB / socket
2 x 240 W 180 W TDP 205 W 2 x 150 W
2 x $3100 $4200 Price $10008 2 x $1300

In our tests today, we’re using Supermicro’s H11DSi motherboard for testing the 2P EPYC processors, the ASRock Rack EPYCD8 for the 1P configurations, the ASUS WS C621E SAGE for 2P Xeon, and the ASUS ROG Dominus Extreme for 1P Xeon. Many thanks to Kingston for supplying memory for this review, as well as Micron for both memory and storage, Corsair for the power supplies, and Noctua for the coolers.

 

Frequency Ramp, Latency and Power
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  • PamelaHorny18 - Saturday, April 18, 2020 - link

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  • The_Assimilator - Tuesday, April 14, 2020 - link

    F as in "press to pay respects for Intel". Reply
  • DanNeely - Tuesday, April 14, 2020 - link

    Am I cynical enough to think AMD deliberately chose "F for fast" knowing that r/AMD would go for the obvious meme? Absolutely. Reply
  • The_Assimilator - Tuesday, April 14, 2020 - link

    I don't post to any of the hardware manufacturer subreddits because the fanboyism is just too extreme. Call of Duty memes, though, are universal. Reply
  • Ian Cutress - Tuesday, April 14, 2020 - link

    Hey everyone, thanks for reading the review. Apologies it's not got the best processors in for comparison, we're working on getting some of them in, and hopefully some more time to test them as it was a quick back-to-back with the Renoir review then this one. We're looking to expanding our testing for these types of processors, so any suggestions (and Cliff Notes-style guides) would be really helpful! Reply
  • hehatemeXX - Tuesday, April 14, 2020 - link

    Just get rid of the consumer CPU's. Most folks in the category of decision makers will not equate these to consumer side. Also, would it be possible to add VM benchmarks? Like compute focused benchmarks. Reply
  • DanNeely - Tuesday, April 14, 2020 - link

    The conventional server market won't; but there are niche segments like high frequency trading that go as crazy with high clocked consumer parts as enthusiasts do because in their world 1ms faster matters more than anything else (remember Intel's no warranty 5ghz all core chip auction last year, HFT was the target market). Those people will be interested in if or how AMDs huge caches on these chip could help them. Reply
  • eek2121 - Tuesday, April 14, 2020 - link

    On the contrary, Zen parts are essentially tweaked server parts. If is entirely plausible to use consumer grade Zen CPUs in server hardware. I should know, a cloud gaming platform I am designing is doing it. Reply
  • ballsystemlord - Tuesday, April 14, 2020 - link

    No, keep the consumer CPUs. Reply
  • kobblestown - Wednesday, April 15, 2020 - link

    Like others, I also think the consumer CPUs should be kept. It's not only about purchasing decisions. Comparing against a wider gamut of CPU helps us to evaluate the impact that different architectural choices have on performance. Many people that frequent this site are not just about the numbers, but about the insights. Reply

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