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JCBiggs

Ryzen 3800x Much Slower with XMP (very odd)

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Posted · Original PosterOP

I ran my new 3800x build through UserBench today. I LIke the benchmark for its comparison purposes across a generic workload.   it scored verywell, The CPU was in the 93rd percentile.   but when I got to looking at the memory, the latency was a little high on the ram.

 

So I opened HWinfo and sure enough, even though the ram was set to 3600 mhz manually, It didnt pick up the advertised timings (obviously since i didnt enable xmp)  So for reference  the timings that are active are 3600mhz, 26-25-25-58  (horrible)

 

So I enabled XMP and my motherboard reports that the ONLY changes that are being made is the memory timings to 18-22-22-42.    I boot the system with no problem and run the benchmark again and it scored CONSIDERABLY less. the cpu performance dropped all they way to the 7th percentile. (FROM (93!)   the gpu also dropped, as well as the ram score.  

 

I cut the XMP profile off and re-ran the test, and got the performance back.   Both modes  had the infinity fabric coupled at 1:1 (1800mhz)

 

 

I have no explanation for this unless its some kind of very misconfigured sub timing.      Anyone? 

 

 

(EDIT _ appologies, the Ram score actually did go up a couple of points. from 97% to 101% with  XMP. its just the CPU that dropped. The gpu did as well but negligible)

 

 

BUILD:

3800x

Vengeance 3600mhz cas 18 Ram (8gbx4)

ws pro Ace x570

 

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5 minutes ago, JCBiggs said:

infinity fabric coupled at 1:1 (1800mhz)

The one you couple is the UCLK, or memory controller frequency. Infinity fabric frequency (FCLK) is another number somewhere else.


"What's under the heatsink?" ep1, "Why it's not as good as it seem?" AMD fanboy edition out, episode 2 "Why my gaming board is a scam?" Intel fanboy edition coming soon (this is a link)

Hardware specs below

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.4?V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: 1TB HP EX920 PCIe x4 M.2 SSD + 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172), 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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What motherboard, which BIOS, and what RAM are you running? 

 

When I built my machine, it needed the Bios flashed to even boot with the full memory kit in it, even with it on the QVL for that MB. 

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Posted · Original PosterOP
Just now, Jurrunio said:

The one you couple is the UCLK, or memory controller frequency. Infinity fabric frequency (FCLK) is another number somewhere else.

its 1:1. both test were coupled. checked in Ryzen master to make 100% sure when i saw the odd result. 

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Posted · Original PosterOP
3 minutes ago, Harry Voyager said:

What motherboard, which BIOS, and what RAM are you running? 

 

When I built my machine, it needed the Bios flashed to even boot with the full memory kit in it, even with it on the QVL for that MB. 

added to post,

 

its a asus ws x570 ace  Im running latest bios .  Ram is vengeance lpx 3600 cas 18  8gb x 4

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5 minutes ago, JCBiggs said:

added to post,

 

its a asus ws x570 ace  Im running latest bios .  Ram is vengeance lpx 3600 cas 18  8gb x 4

Can you test something like cinebench r20 or r15, unigine valley and heaven benchmark, and 3dmark?

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15 minutes ago, JCBiggs said:

3600 cas 18  8gb x 4

maybe it's unstable then. Keep XMP profile enabled, but select 3200MHz and see if score improves


"What's under the heatsink?" ep1, "Why it's not as good as it seem?" AMD fanboy edition out, episode 2 "Why my gaming board is a scam?" Intel fanboy edition coming soon (this is a link)

Hardware specs below

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.4?V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: 1TB HP EX920 PCIe x4 M.2 SSD + 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172), 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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Yeah. But userbenchmark is very unreliable.

 

Use some real benchmarks.  


RYZEN 5 3600 | MSI GTX 1060 6GB GAMING X | 16GB CORSAIR VENGEANCE LPX 3200 DDR4 | MSI B350M MORTAR | 250GB SAMSUNG EVO 860 | 2TB SEAGATE BARRACUDA | 1TB TOSHIBA SSHD | 120GB KINGSTON SSD | WINDOWS 10 PRO | INWIN 301| BEQUIET PURE POWER 10 500W 80+ SILVER | ASUS 279H | LOGITECH Z906 | DELL KB216T | LOGITECH M185 | SONY DUALSHOCK 4

 

LENOVO IDEAPAD 510 | i5 7200U | 8GB DDR4 | NVIDIA GEFORCE 940MX | 1TB WD | WINDOWS 10 GO HOME 

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Posted · Original PosterOP
13 hours ago, Mark Kaine said:

Yeah. But userbenchmark is very unreliable.

 

Use some real benchmarks.  

it doesn't matter how "reliable" it is.  it consistently shows a lower score with the ram timings tightened.  I did run cinebench and it was 2165 average across 3 test with xmp memory on.  with xmp off, it scored 2204.

 

 

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Posted · Original PosterOP
13 hours ago, Jurrunio said:

maybe it's unstable then. Keep XMP profile enabled, but select 3200MHz and see if score improves

ill do some more testing after work. my bet is that at 3200 the score will drop further since the fclock will drop to match.  but just a hunch. 

 

 

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3 hours ago, JCBiggs said:

ill do some more testing after work. my bet is that at 3200 the score will drop further since the fclock will drop to match.  but just a hunch. 

 

 

just FYI, if you can push FCLK 266MHz or higher than half memory data rate withy stability, push FCLK higher and let it desync. Faster that way


"What's under the heatsink?" ep1, "Why it's not as good as it seem?" AMD fanboy edition out, episode 2 "Why my gaming board is a scam?" Intel fanboy edition coming soon (this is a link)

Hardware specs below

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.4?V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: 1TB HP EX920 PCIe x4 M.2 SSD + 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172), 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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Memory timings set to auto will give you all sort of weird and awful timings, set them manually using Typhoon Burner and DRAM Calcultator.

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Posted · Original PosterOP

I beleive the above poster was correct.  All I did was manually set 18-22-22-42  instead of using XMP and my score results went back to where they were.  Though oddly, I didnt improve any. latency did a few points. 

 

Good enough for me for now.  Ill do a consierable amount of tuning later. Im still not hitting 4.5ghz as often as I like. Solidworks is mostly single threaded so I would like to get that performance up a little. 

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