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lotus10101

Different scores PBO vs all core OC

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Posted · Original PosterOP

Hi all I'm just wondering if the community could help me understand something, if I basically set my 3700x to default with pbo enabled it hits average 4.15hz to 4.2hz in cinebench r20 I'll get multi core scores about 3900's but if I manually set all core 4.15hz with 1.2v  I get 5000 give or take a couple points,is this normal behavior?

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Yup because PBO doesn't lock the voltages nor clocks like manual OC does, it just changes the power tables and voltage tables so that it turbos way higher.


@BlueScope819 so I can see your post

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in some applications all core ocs tend to be better than pbo sometimes but i'd be skeptical at 20% better


topics i need help on:

Spoiler

 

 

my "oops i bought intel right before zen 3 releases" build

CPU: Ryzen 5 3600 (placeholder)

GPU: Gigabyte 980ti Xtreme (also placeholder), deshroud w/ generic 1200rpm 120mm fans x2, stock bios 130% power, no voltage offset: +70 core +400 mem 

Memory: 2x16gb GSkill Trident Z RGB 3600C16, 14-15-30-288@1.45v

Motherboard: Asus ROG Strix X570-E Gaming

Cooler: Noctua NH-D15S w/ white chromax bling
OS Drive: Samsung PM981 1tb (OEM 970 Evo)

Storage Drive: XPG SX8200 Pro 2tb

Backup Storage: Seagate Barracuda Compute 4TB

PSU: Seasonic Prime Ultra Titanium 750W w/ black/white Cablemod extensions
Case: Fractal Design Meshify C Dark (to be replaced with a good case shortly)

basically everything was bought used off of reddit or here, only new component was the case. absolutely nutty deals for some of these parts, ill have to tally it all up once it's "done" :D 

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Cinebench is specifically a multi-core bench (except when you run the single-core option, of course), so it's going to obviously benefit from an all-core OC. Precision Boost, and especially PBO (which just adds extra headroom for PB), is about short boosts for mostly single-core workloads, so you're going to tap it out pretty quick with a bench like Cinebench which can take a few minutes to run.

 

However, they call them synthetic benchmarks for a reason. There's no that much that really pushes all cores, and all cores for sustained periods, at that, whereas there's a thousand little tasks that fire off and finish quick, and boost will be must better at that. It all depends on the specific workload for your rig, but most of the time, you're better off just leaving the CPU to do its thing, than doing an all-core OC, at least for AMD.

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3900 seems way too low for a 3700X, it should be around 4800~4900 at stock, ~100 points higher with PBO and a bit higher with a high all core OC. It seems to be throttling or locked at a lower clock than normal for it to be scoring so low.

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PBO settings isnt stable then


CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V 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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