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FX 8320 @4.8ghz + 2 GTX 580 SLI , Help me find the dreaded AMD CPU Bottleneck!

post #1 of 32
Thread Starter 
I typically do not run SLI or Crossfire, however I was intrigued by comments from another thread: http://www.overclock.net/t/1332199/amd-fx-6300-x6-4-2ghz-vs-my-1055t-4-2ghz-what-is-the-best-for-gaming/90

I have 2 580s from different systems, so I figure I would take Almighty's challenge. Unfortunately, I don't have Crysis, and it costs $20 on steam. I will scour the local game shops to see if they have a hard copy for a bargain price. For now, I will run free benchmarks and see what happens.

System Setup:
AMD FX 8320
Asus Crosshair V
2x EVGA GTX 580 (base models) stock clocks
Kingston HyperX Blu 1600mhz DDR3 9-9-9-24-36-1T
WD 1TB /w fresh Win8 64bit (didn't want to give up my SSD)
Corsair H100i
Cooler Master 1000W PSU

I just ran a Heaven3.0 run to see if the 580s would be above 95% usage and what would the CPU usage be. It's late and I've only gotten 1 run in. The GPUs pretty much stayed around 96% - 98% while total CPU was around 30% - 35%.


My plans are to down clock the CPU from 4.8ghz to stock and see what happens.

I'm open for suggestions on what else I can try with this setup. I'm not a bencher so I wouldn't know the best way to identify a CPU bottleneck.
post #2 of 32
If the cpu is bottlenecking the system, an increase in clock speed would yield a significant increase in video performance. But the cpu itself should not be the bottleneck; it is the 990fx chipset (dual+ card setups just do not scale).
post #3 of 32
Quote:
Originally Posted by flyin15sec View Post

I typically do not run SLI or Crossfire, however I was intrigued by comments from another thread: http://www.overclock.net/t/1332199/amd-fx-6300-x6-4-2ghz-vs-my-1055t-4-2ghz-what-is-the-best-for-gaming/90
I have 2 580s from different systems, so I figure I would take Almighty's challenge. Unfortunately, I don't have Crysis, and it costs $20 on steam. I will scour the local game shops to see if they have a hard copy for a bargain price. For now, I will run free benchmarks and see what happens.
System Setup:
AMD FX 8320
Asus Crosshair V
2x EVGA GTX 580 (base models) stock clocks
Kingston HyperX Blu 1600mhz DDR3 9-9-9-24-36-1T
WD 1TB /w fresh Win8 64bit (didn't want to give up my SSD)
Corsair H100i
Cooler Master 1000W PSU
I just ran a Heaven3.0 run to see if the 580s would be above 95% usage and what would the CPU usage be. It's late and I've only gotten 1 run in. The GPUs pretty much stayed around 96% - 98% while total CPU was around 30% - 35%.

My plans are to down clock the CPU from 4.8ghz to stock and see what happens.
I'm open for suggestions on what else I can try with this setup. I'm not a bencher so I wouldn't know the best way to identify a CPU bottleneck.

On a more useful note, I can echo the benches with 2x 6970s. tongue.gif
post #4 of 32
There's a very very slight bottleneck but its very good, problem is that Heaven is not very CPU dependant as its a very GPU intensive benchmark so it's not the best way to test a CPU limitation to be honest.
post #5 of 32
Thread Starter 
I do have Skyrim and Shogun 2, also. I'll see what I can come with.
post #6 of 32
Thread Starter 
I give up! I just spent the last day and a half trying to get Crysis to run. It just won't run, comes up with a black screen and error that app stopped working.

Believe me I tried every compatibility mode with "Run as Admin". I down graded video drivers. I re-install the app from Steam 3 times. I went from Win8 to Win7. Replaced 3 sets of memory. Ran system stock, and overclocked. I tried applying patch 1.2, it won't update.

I see some google hits with the same issue I have, and no resolutions. It appears to be some type of Steam version issue.

Sorry, this experiment has taken up more time and effort than I care about.mad.gif
post #7 of 32
You just need to benchmark shogun 2 (it has a built in benchmark) and ask people with 580 sli to post shogun2 results here.

Here's a fx 8350 vs 3770k with 7970 Crossfire review, both cpus are OCed to 4.8ghz, lemme sum it up, it's not pretty for FX.

http://vr-zone.com/articles/amd-fx-8350-vs-intel-core-i7-3770k--4.8ghz--multi-gpu-gaming-performance/17494-1.html
Intel Evilnow
(18 items)
 
   
CPUMotherboardGraphicsRAM
i5 2500k 4ghz @ Offset -0.015 Asus P8P67 Evo (bios 3207) Sapphire 280x Tri-x 3GB OC (Stock 1020/1500 Non... G.Skill RipjawsX 2x4gb 1866mhz 9-10-9-28-2n @ 1.5v 
Hard DriveHard DriveHard DriveHard Drive
SHSS37A120G WD5000AAKX-001CA0 WD20EARX WD20EZRZ 
Hard DriveOptical DriveCoolingOS
WD5001AALS-00L3B2 (Now External) ASUS DRW-1814BLT Noctua NH-u12p SE2 Windows 10 Pro 
MonitorKeyboardPowerCase
Asus VH242H Wobbly Stand :) Microsoft Ergo 4000 Enermax Infiniti 650 (28a,28a,30a) Cooler Master haf 912 Advanced 
MouseOther
A4tech x7 F3 Sunbeam RHK-EX-BA Rheobus-Extreme Fan Controlle... 
CPUMotherboardGraphicsRAM
Phenom II x6 1090t BE 3.6/4.0 Turbo@def.volt MSI K9A2 Platinum v1 Sapphire HD6850 1GB 850/1100@def.volt Kingston 2x2gb Hyperx 1066 5-5-5-15 
Hard DriveHard DriveOptical DriveOS
Western Digital WD5001AALS Seagate Barracuda ST3250410AS Asus DRW-1814BLT Windows 7 Ultimate x64 SP1 
MonitorKeyboardPowerCase
Asus VH242H 23.6" Wobbly Stand :D Microsoft Ergo 4000 Enermax Infiniti 650w (28a,28a,30a) Thermaltake Kandalf SuperTower 
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Intel Evilnow
(18 items)
 
   
CPUMotherboardGraphicsRAM
i5 2500k 4ghz @ Offset -0.015 Asus P8P67 Evo (bios 3207) Sapphire 280x Tri-x 3GB OC (Stock 1020/1500 Non... G.Skill RipjawsX 2x4gb 1866mhz 9-10-9-28-2n @ 1.5v 
Hard DriveHard DriveHard DriveHard Drive
SHSS37A120G WD5000AAKX-001CA0 WD20EARX WD20EZRZ 
Hard DriveOptical DriveCoolingOS
WD5001AALS-00L3B2 (Now External) ASUS DRW-1814BLT Noctua NH-u12p SE2 Windows 10 Pro 
MonitorKeyboardPowerCase
Asus VH242H Wobbly Stand :) Microsoft Ergo 4000 Enermax Infiniti 650 (28a,28a,30a) Cooler Master haf 912 Advanced 
MouseOther
A4tech x7 F3 Sunbeam RHK-EX-BA Rheobus-Extreme Fan Controlle... 
CPUMotherboardGraphicsRAM
Phenom II x6 1090t BE 3.6/4.0 Turbo@def.volt MSI K9A2 Platinum v1 Sapphire HD6850 1GB 850/1100@def.volt Kingston 2x2gb Hyperx 1066 5-5-5-15 
Hard DriveHard DriveOptical DriveOS
Western Digital WD5001AALS Seagate Barracuda ST3250410AS Asus DRW-1814BLT Windows 7 Ultimate x64 SP1 
MonitorKeyboardPowerCase
Asus VH242H 23.6" Wobbly Stand :D Microsoft Ergo 4000 Enermax Infiniti 650w (28a,28a,30a) Thermaltake Kandalf SuperTower 
Mouse
A4 tech Swop-3 
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post #8 of 32
Thread Starter 
Well, if someone paid for a 3770K, it BETTER be faster than a FX83x0.
post #9 of 32
Quote:
Originally Posted by flyin15sec View Post

Well, if someone paid for a 3770K, it BETTER be faster than a FX83x0.

For gaming a 3750k is not that much slower then a 3770k AMD yet the 3750k is the same price as an FX 8350 smile.gif
post #10 of 32
Quote:
Originally Posted by flyin15sec View Post

Well, if someone paid for a 3770K, it BETTER be faster than a FX83x0.

As if the 3770K was actually that expensive.

And you should know the results for the 3570K show it's much better at stock than a 4.8Ghz 8350.
     
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Intel Core i5 2500k @ 4.9Ghz Gigabyte GA-Z77X-UP7 EVGA GTX 980Ti SC 4x 4GB Patriot Viper Xtreme 2133Mhz 
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Hard DriveCoolingOSPower
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CPUMotherboardGraphicsRAM
Intel Core i5 2500k @ 4.9Ghz Gigabyte GA-Z77X-UP7 EVGA GTX 980Ti SC 4x 4GB Patriot Viper Xtreme 2133Mhz 
Hard DriveHard DriveCoolingOS
Intel 520 Series 120GB SSD WD Caviar Blue SATA II 640GB EK CPUWB & Rad, Temporary XSPC Pump & Res, All ... Windows 7 Home Premium 
MonitorKeyboardPowerCase
3x 1080p 24" Monitors Razer BlackWidow Ultimate Corsair HX-750 NZXT Lexa S (Highly Modified) 
MouseMouse PadAudio
Razer Naga 2014 Steelseries QCK Kenwood KA-5500 Reciever & (Temporary) ATH-M30X's 
CPUMotherboardGraphicsRAM
Intel Atom D525 2C/4T 1.8Ghz SuperMicro X7SPE-HF-D525 Integrated - Not Used 2x 2GB DDR3 Sodimms 
Hard DriveCoolingOSPower
4GB Sata DOM Passive (except for PSU Fan) Debian GNU/Linux 8.0 Jessie PicoPSU 120Watt with 60Watt EDAC Brick 
CaseOther
1U Supermicro DHCP/DNS/Munin 
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