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Would a FX-6100 or a FX-4350 cpu @ stock speeds bottleneck a 970 ?

post #1 of 10
Thread Starter 
I'm not asking for myself it's a friend of mine. He's currently has FX-6100 with a GTX 660. He was thinking of upgrading to 970 or maybe the 960 when it comes out, I told him that his FX-6100 and even possibly the FX-4350 which is a little newer but still be underpowered for the 970 and the 960 maybe. I read in many places that FX-6100 were not that good for gaming in general compared to the Intel's, hell is he bottle necking his 660 currently with his FX-6100 ? thanks
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post #2 of 10
He can expect a heavy bottleneck.
He'll probably lose more than half of FPS as compared to using an i5 4670k.

For instance, if an i5 4670K +GTX 970 can get 100 FPS, imagine an FX6100 +GTX 970 will only get 40 FPS.
An FX6100 has to be clocked around 4.6 to 4.7 Ghz just to match a stock i5 2500k.

I suggest he upgrade the cpu first before the gpu.
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post #3 of 10
At stock, no way.You must overclock AMD chips to get even close to i3, or even i5 performance and boost your fps.
post #4 of 10
Thread Starter 
So even if he used the FX-4350 would bottleneck a 970 and a 960 ? Also what about his current setup FX-6100 and with the GTX 660 is that okay, also he's thinking of switching his FX-6100 for a FX-4350 but I told him it would be a small upgrade not much.
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post #5 of 10
Quote:
Originally Posted by Subzero11 View Post

So even if he used the FX-4350 would bottleneck a 970 and a 960 ? Also what about his current setup FX-6100 and with the GTX 660 is that okay, also he's thinking of switching his FX-6100 for a FX-4350 but I told him it would be a small upgrade not much.

I would suggest he get nothing lower than a 8320. Tjose extra threads are needed
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post #6 of 10
Quote:
Originally Posted by Deadboy90 View Post

Quote:
Originally Posted by Subzero11 View Post

So even if he used the FX-4350 would bottleneck a 970 and a 960 ? Also what about his current setup FX-6100 and with the GTX 660 is that okay, also he's thinking of switching his FX-6100 for a FX-4350 but I told him it would be a small upgrade not much.

I would suggest he get nothing lower than a 8320. Tjose extra threads are needed

Extra threads will help in some games, but not others.

However, if he's dropping $300 for a GPU, $100-$150 for a CPU shouldn't be a big deal. A Pentium g3258 + a cheap motherboard would also be a good option.
Edited by brucethemoose - 10/18/14 at 12:27pm
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post #7 of 10
Swapping from a 6100 to a 4350 would be a downgrade. Because of CMT, he will now have performance loss when activating a third thread compared to the 6100.
A 660 is a great card to match with the FX series. They both reach their limits at a similar point - this is from my own experience. When playing CPU bound games, the GPU is still being utilized quite a bit (around 70% to 80%). And when you are playing a game that is GPU bound, the CPU is about to max out the performance it has for the cores it can use.

And a game that has 100FPS with a 4690k will not hit 40FPS with an AMD chip. That is an exaggeration, however it is true though that the i5 is quite a bit more powerful.

EDIT:
Quote:
Originally Posted by brucethemoose View Post

Extra threads will help in some games, but not others.
There is the CMT issue, where games that use four cores will perform worse in the quad and hex core variants. The performance hit will be about 17% per module that has two threads being used.
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post #8 of 10
Quote:
Originally Posted by brucethemoose View Post

Extra threads will help in some games, but not others.

However, if he's dropping $300 for a GPU, $100-$150 for a CPU shouldn't be a big deal. A Pentium g3258 + a cheap motherboard would also be a good option.

Yes but a 4350 has only 2 FPU's despite being a "quad core". A 8320 and up have 4 FPUs across the 8 " cores" that will help even in games that dont take advantage of all 8 threads.
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post #9 of 10
Yes minimum a 4.8ghz 6100 or a 4.2ghz fx 6300 better a 8320/8320e if he can find
post #10 of 10
Quote:
Originally Posted by Deadboy90 View Post

Quote:
Originally Posted by brucethemoose View Post

Extra threads will help in some games, but not others.

However, if he's dropping $300 for a GPU, $100-$150 for a CPU shouldn't be a big deal. A Pentium g3258 + a cheap motherboard would also be a good option.

Yes but a 4350 has only 2 FPU's despite being a "quad core". A 8320 and up have 4 FPUs across the 8 " cores" that will help even in games that dont take advantage of all 8 threads.

Even then, alot (if not most) games are limited by a single thread, and will only partially saturate 3 others.
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