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2 evga 1080 classified in sli only achieving 40 fps at 4k in witcher 3

Evilscallywag
By Evilscallywag
in PC Gaming
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Posted

Hi Guys

I'm running the witcher 3 with 2 evga 1080 classifieds in sli with the nvidia HB bridge and I only achieve 40fps with all settings cranked. All online benchmarks with 1080s in sli on this game report 70+ fps. I disable SLI and achieve around 32 fps with settings cranked on a single card so I see very poor scaling.

 

With Crysis 3, I only get about 40fps in SLI while many benchmarks I've seen report 70ish. The scaling with Crysis is much better as I get 1/2 that frame rate with SLI disabled. 

 

In precision oc I see that while running the witcher 3 both GPUs have around 65% load while the clock speed settles to a steady 2076MHz.

 

Lowering the resolution in the witcher 3 gives a nice bump in the fps so I don't think my CPU is the issue. Any hints or tips on how I might replicate the benchmarks I've seen online?

 

Kind Regards

Connor

 

Intel Core i7-6700k

G.SKILL TridentZ Series 32GB (4 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200 

ASUS Z170 PRO GAMING LGA 1151

EVGA Geforce GTX 1080 Classified (x2)

SAMSUNG 950 PRO M.2 512GB

Corsair Hydro Series H115i

EVGA 850W power supply

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Do you have any anti-virus or background services on?

Cor Caeruleus Reborn v6

Spoiler

CPU: Intel - Core i7-8700K

CPU Cooler: be quiet! - PURE ROCK 
Thermal Compound: Arctic Silver - 5 High-Density Polysynthetic Silver 3.5g Thermal Paste 
Motherboard: ASRock Z370 Extreme4
Memory: G.Skill TridentZ RGB 2x8GB 3200/14
Storage: Samsung - 850 EVO-Series 500GB 2.5" Solid State Drive 
Storage: Samsung - 960 EVO 500GB M.2-2280 Solid State Drive
Storage: Western Digital - Blue 2TB 3.5" 5400RPM Internal Hard Drive
Storage: Western Digital - BLACK SERIES 3TB 3.5" 7200RPM Internal Hard Drive
Video Card: EVGA - 970 SSC ACX (1080 is in RMA)
Case: Fractal Design - Define R5 w/Window (Black) ATX Mid Tower Case
Power Supply: EVGA - SuperNOVA P2 750W with CableMod blue/black Pro Series
Optical Drive: LG - WH16NS40 Blu-Ray/DVD/CD Writer 
Operating System: Microsoft - Windows 10 Pro OEM 64-bit and Linux Mint Serena
Keyboard: Logitech - G910 Orion Spectrum RGB Wired Gaming Keyboard
Mouse: Logitech - G502 Wired Optical Mouse
Headphones: Logitech - G430 7.1 Channel  Headset
Speakers: Logitech - Z506 155W 5.1ch Speakers

 

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Along with what others have suggested, what are your temps and clock speeds for your GPU's and CPU?

Main System Specs:

  • Intel Core i5 6500 3.2GHz CPU
  • Gigabyte GA-H170-D3H Motherboard
  • Kingston HyperX Fury 16GB 2400MHz, Gskill Ripjaws 8GB
  • Asus GTX 1060 Turbo
  • Kingston HyperX Savage 240GB SSD
  • Seagate 1TB NAS Grade HDD x2
  • Thermaltake NiC F3 Cooler
  • EVGA Supernova 750 G2 Power Supply
  • NZXT S340 Red/Black Case
  • Noctua NF-F12 Fan x2

Laptop Specs:

  • Intel Pentium N3700 CPU
  • 4GB Kingston RAM
  • Intel HD Graphics
  • Windows 10 Home

Peripherals:

  • Microsoft Wired 600 KB
  • Dell 2003 Mouse
  • HP Compaq LA2206x Monitor
  • Logitech X530 5.1 Speakers
  • Roland RH-5 Headphones
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Hairworks msaa, what is it on? I would turn it to off.

I7 4790K-----ASUS Z97-A-----GTX 1080-----CORSAIR H105-----CORSAIR VENGEANCE PRO 16GB-----ASUS PG278Q-----LOGITECH G900-----MASTERKEYS PRO L-----Sennheiser GSX 1000

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