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AMD FX-8150 bottleneck 760 sli - Page 6

post #51 of 77
SLI is pointless on resolutions lower than 1080p with less than one monitor/less than 60FPS.

Bottlenecking only occurs when a desirable framerate is not achieved while one part of the system is running as fast as it can. Even though CPU's may not hit 100% utilization, they may be the bottleneck. Example:

Even with my 4k texture pack, and max graphics settings, my Skyrim holds me to ~40FPS in certain situations. My GPU is at 80% use, while my CPU is at 25%. The reason being is I have an octo-core, and Skyrim only uses 2 threads. 2/8=25%. So that means both of the threads it can use are at 100%. Since my CPU cannot give any more power, the GPU stops at ~80% since the bottleneck is at the CPU.

Also, are you saying you have 2x4GB sticks, or 2x2GB sticks to make 4GB in dual channel?
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post #52 of 77
Quote:
Originally Posted by johnysamrhys View Post

sorry don't no what just happened to my post ,,,,what I was trying to say would my processor AMD FX-8150 bottleneck 2 x 760 in sli with 4 ram 1600 with one monitor SyncMaster (1680x1050@59Hz) with a cx 750 watt psu,, games bf3????

Operating System
Windows 7 Home Premium 64-bit SP1
CPU
AMD FX-8150 13 °C
Zambezi 32nm Technology
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4.00GB Dual-Channel DDR3 @ 802MHz (9-9-9-24)
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ASUSTeK COMPUTER INC. SABERTOOTH 990FX (Socket 942) 29 °C
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Your monitor there is the bottle neck. You aren't really applying enough stress to the GPU's to warrant 100% use. So this would explain why CPU and GPU stress is relatively low. And FX-8150 at 5GHZ. Thats some good going there well done! To be honest it is unlikely an overclocked 8 core FX processor 81XX or 83XX will bottleneck a dual GPU set-up. You might run into problems with three. But even that is unlikely. Yes FX'es get lower bench scores (tell us something we don't know.) but the mythical bottleneck doesn't really exist. Your system is still good and you still have 83XX or 9XXX CPU as an upgrade path. If you want to put rest to those bottleneck doubts. One of the top 10 Heavenbench scores on OCN is held by an 8350 and I think that was with a triple or quad GPU set up. thumb.gif
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post #53 of 77
Quote:
Originally Posted by Alastair View Post

Your monitor there is the bottle neck. You aren't really applying enough stress to the GPU's to warrant 100% use.

I have been following two bottleneck threads recently... I had them mixed up. The monitor is your issue. When you disabled VSync you had more stutter (which is an effect as well as tearing) but hit 150FPS. That tells me immediately that you don't actually have an issue. The reason why you are not seeing full utilization with VSync on is because your system doesn't need any more power to do what you want it to.

EDIT: If you are having a smoothness issue, it would be due to the 4GB of RAM. Your system is needing to remove cached data, seek the new data on your storage, and cache the new data. It is also creating a page file (which is a huge headache... I had to deal with it). Getting 8GB (16GB is better thumb.gif ) would be a massive improvement. In fact - you should see a massive improvement overall. Not just in gaming or demanding tasks. The less your data drives need accessing, the better.
Edited by AcEsSalvation - 3/11/14 at 1:25pm
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post #54 of 77
Quote:
Originally Posted by Alastair View Post

LOLWUT?!?!? Dats a joke right? Please tell me its a joke. Im loving it if it is tongue.gif

No jokes, pure fact.
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post #55 of 77
Quote:
Originally Posted by johnysamrhys View Post

great I was worried it wasn't enough after reading its a very low quality corair psu,,it is making a high pitched noise ,,its really doing my head in its not loud but its there ,,,

it is a bit on a low side, but should be ok.

If you want to make sure, get Cooler Master V 700/850W.
Edited by psyside - 3/12/14 at 12:37am
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post #56 of 77
Thread Starter 
onistly I thought an Zambezi 8 core AMD FX-8150 at 5.0 would fly bf3 and run 760 sli I no im starving it with 4 gb ram,,,but still,,,,ive build on the i5 2500k = gtx 580 sli ,,,,,i7 2600 k --680 sli and the i7 2700k --690 absulutly no problems on bf3 ,,,im lost to what the problem is and after tonight im switching back to intel,,, it can only be the ram is the problem otherwise my processor just aint good enough!!!!! like I said im new on AMD but my mobo supports sli so why not do sli,,,heres my spec again

Core 0 4515.0 MHz x 22.5 200.7 MHz 2207.3 MHz 11 °C APIC ID: 0
Core 1 4515.0 MHz x 22.5 200.7 MHz 2207.3 MHz 11 °C APIC ID: 1
Core 2 4515.0 MHz x 22.5 200.7 MHz 2207.3 MHz 11 °C APIC ID: 2
Core 3 4515.0 MHz x 22.5 200.7 MHz 2207.3 MHz 11 °C APIC ID: 3
Core 4 4515.0 MHz x 22.5 200.7 MHz 2207.3 MHz 11 °C APIC ID: 4
Core 5 4515.0 MHz x 22.5 200.7 MHz 2207.3 MHz 11 °C APIC ID: 5
Core 6 4515.0 MHz x 22.5 200.7 MHz 2207.3 MHz 11 °C APIC ID: 6
Core 7 4515.0 MHz x 22.5 200.7 MHz 2207.3 MHz 11 °C APIC ID: 7

drop frequency down to 4.5 as im only running one 760 now as its better,,,[
post #57 of 77
Thread Starter 
Quote:
Originally Posted by AcEsSalvation View Post

SLI is pointless on resolutions lower than 1080p with less than one monitor/less than 60FPS.

Bottlenecking only occurs when a desirable framerate is not achieved while one part of the system is running as fast as it can. Even though CPU's may not hit 100% utilization, they may be the bottleneck. Example:

Even with my 4k texture pack, and max graphics settings, my Skyrim holds me to ~40FPS in certain situations. My GPU is at 80% use, while my CPU is at 25%. The reason being is I have an octo-core, and Skyrim only uses 2 threads. 2/8=25%. So that means both of the threads it can use are at 100%. Since my CPU cannot give any more power, the GPU stops at ~80% since the bottleneck is at the CPU.

Also, are you saying you have 2x4GB sticks, or 2x2GB sticks to make 4GB in dual channel?
2 x 2 gb sticks ,,,,I no its not enough getting 8 g tomorrow
post #58 of 77
Quote:
Originally Posted by johnysamrhys View Post

2 x 2 gb sticks ,,,,I no its not enough getting 8 g tomorrow
You will see a large performance boost.
How many times after gaming do you go to browse the internet (like OCN) and notice that things are a bit laggy? It's due to the page file. Instead of having system data on the RAM (or data the browser needs), it's on your storage drive. So now it has to move that data back to the RAM for it to be used quickly again. Or, sometimes it won't move the data back. It will just let it sit there. People who use SSD's can give a bit of data to use as page file, or some will already be used for page file if the OS is on it.

I would also suggest getting 2x4GB of RAM. If you get another 2x2GB, that will be more stress on the memory controller on your chip. You might have to lower clocks, give more VCore, or give the NB more volts. Also, if you want dual channel if you plan on getting another 2x2GB kit, make sure it is the same speed and timings. Otherwise, your system will only use single channel. I think you can overclock on set to match the other to enable dual channel, but I would get that verified by someone else before you try it.
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post #59 of 77
Thread Starter 
Quote:
Originally Posted by Alastair View Post

Your monitor there is the bottle neck. You aren't really applying enough stress to the GPU's to warrant 100% use. So this would explain why CPU and GPU stress is relatively low. And FX-8150 at 5GHZ. Thats some good going there well done! To be honest it is unlikely an overclocked 8 core FX processor 81XX or 83XX will bottleneck a dual GPU set-up. You might run into problems with three. But even that is unlikely. Yes FX'es get lower bench scores (tell us something we don't know.) but the mythical bottleneck doesn't really exist. Your system is still good and you still have 83XX or 9XXX CPU as an upgrade path. If you want to put rest to those bottleneck doubts. One of the top 10 Heavenbench scores on OCN is held by an 8350 and I think that was with a triple or quad GPU set up. thumb.gif
great reply I thought the processor at that speed would be fine and if it was the bottleneck it would be closer to 100% usage ,,,im upgrading to 8 gb tomorrow so that's that ruled out 2,,,but I new my monitor had some part in this,, one word its pants,, compard to my old 120 hz,,,cant keep up with the speed,,,, reason why I have this monitor is im building for fun as I enjoy it and will sell it when I finished but don't wont to buy a 120 hz montor just to test,,,would it be better tested on my 50" hd tv also 60 hz ?
post #60 of 77
Thread Starter 
Quote:
Originally Posted by AcEsSalvation View Post

I have been following two bottleneck threads recently... I had them mixed up. The monitor is your issue. When you disabled VSync you had more stutter (which is an effect as well as tearing) but hit 150FPS. That tells me immediately that you don't actually have an issue. The reason why you are not seeing full utilization with VSync on is because your system doesn't need any more power to do what you want it to.

EDIT: If you are having a smoothness issue, it would be due to the 4GB of RAM. Your system is needing to remove cached data, seek the new data on your storage, and cache the new data. It is also creating a page file (which is a huge headache... I had to deal with it). Getting 8GB (16GB is better thumb.gif ) would be a massive improvement. In fact - you should see a massive improvement overall. Not just in gaming or demanding tasks. The less your data drives need accessing, the better.
thx for the post,,,4gb ram I now is low and will be upgrading that tomorrow ,,,hopsfully no more stuttering ,,it doesn't help as I play big maps 64 players witch takes a bit of memory!!!!
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