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I5 750 vs i7 series

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July 9, 2010 4:51:40 AM

Hey guys!!!! this is my first thread here. I decided to come here because i always get redirected here off googling tech stuff. I figured it was a legit place. Not a lot of spamming going on and the users seem to be fairly up to date and knowledgeable about technical questions, anyways here goes!!!


I am looking to buy a new computer (not build because of the minimal price difference).
I am going to use this computer for gaming ONLY. (minues internet use and what have you)
I was wondering if the i5 750 would be better for gaming over an i7, considering, from what i have heard, that the hyperthreading in the i7's does not get taken advantage of in most games.
Will i see any differences in performance while using an i5 750 over an i7?

Also, while i am here. paired with the i5 750 (if it is a better choice) or the i7, would a 1gb 5870 or 5970 be a better choice of a gpu. This is considering i will be playing on a 24inch monitor or smaller. Obviously the 5970 will pump more power, but will i see the difference and/or will it effect my gaming while using a 24inch monitor or smaller?

Thanks ahead of time and i look forward to hearing what you guys have to say =]
-TheNewGuy

More about : 750 series

a b à CPUs
July 9, 2010 5:06:45 AM

As far as gaming goes you see little to no difference in gaming performance upgrading above a quad core i5 750. It OCs well, and with just a little OC it'll never hold up even very high end GPU set ups. I'm running CF 5850s that are OCed quite a bit no problem. Granted, at low res like 1280x1050 or w/e you can get some bottlenecking, but at normal 1920x1080 or thereabouts, the CPU will definitely not bottleneck.

The 5970 will be noticeably faster than a single 5870, however, I recommend saving a $100 and getting 2 5850s. From the results I've seen, 2 5850s are faster than a 5970 although it can potentially be better.
a c 203 à CPUs
July 9, 2010 5:08:59 AM

Hello iamnewhere;

Here is a benchmark comparison between the i5-750 2.66Ghz and i7-920 2.66Ghz CPUs.

If going with the lower priced i5-750 is going to get you into a better video card you'll end up with a better gaming system.

Since a 5970's performance is nearly identical to CF 5850s I kinda like the idea of getting 2x 5850s instead of the single 5970.
You could even stagger the purchase over time since a even a single 5850 should do well on a 24" monitor.
THG Radeon HD 5970 2GB review
Related resources

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a c 131 à CPUs
July 9, 2010 5:10:31 AM
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Awesome.
Well, with the i5 vs i7, you will see no difference in gaming with either of those two cards, with current games.

Which GPU would be a better choice? Well yes, the 5970 is more powerful, but it is a dual card, so it will suffer the same performance scaling of crossfire. This means inconsistent performance between games but it will still always perform better than a single 5870 unless the game cannot use crossfire, in which case it will perform between a 5850 and a 5870. Now, keep in mind I am biased against crossfire and dual cards but I recommend the 5870 because for the price/performance it will be better when taking into account the scaling of crossfire.

This is considering i will be playing on a 24inch monitor or smaller.
That information is useless. The pixel size does not matter when rendering. What matters is the resolution. Correct me if I am wrong, but due to what is common, I'm going to assume you will be using a 1920x1080 monitor.

Obviously the 5970 will pump more power, but will i see the difference and/or will it effect my gaming while using a 24inch monitor or smaller?
This depends entirely on the games you play, how many settings you are willing to sacrifice, what framerate you want to achieve as a minimum and how the particular games scale with crossfire.
At 1920x1080, for a minimum of 60FPS, you can play most games on max, some on max without AA and may have to lower a couple settings of some of the most demanding games like Crysis and Cryostasis.
July 9, 2010 5:29:34 AM

enzo matrix said:
Awesome.
Well, with the i5 vs i7, you will see no difference in gaming with either of those two cards, with current games.

Which GPU would be a better choice? Well yes, the 5970 is more powerful, but it is a dual card, so it will suffer the same performance scaling of crossfire. This means inconsistent performance between games but it will still always perform better than a single 5870 unless the game cannot use crossfire, in which case it will perform between a 5850 and a 5870. Now, keep in mind I am biased against crossfire and dual cards but I recommend the 5870 because for the price/performance it will be better when taking into account the scaling of crossfire.

This is considering i will be playing on a 24inch monitor or smaller.
That information is useless. The pixel size does not matter when rendering. What matters is the resolution. Correct me if I am wrong, but due to what is common, I'm going to assume you will be using a 1920x1080 monitor.

Obviously the 5970 will pump more power, but will i see the difference and/or will it effect my gaming while using a 24inch monitor or smaller?
This depends entirely on the games you play, how many settings you are willing to sacrifice, what framerate you want to achieve as a minimum and how the particular games scale with crossfire.
At 1920x1080, for a minimum of 60FPS, you can play most games on max, some on max without AA and may have to lower a couple settings of some of the most demanding games like Crysis and Cryostasis.


what i meant when i mentioned the 24 inch monitor (yes at 1920x1090 btw =]) is that at that resolution, will the 5870 start to show a noticable slowdown in its performance?

Also, what i meant by asking if the 5970 will show any significant advantage over the 5870 on 24inch monitor is.... at a resolution of 1920x1080, will the 5970 totally dominate , whereas the 5870 would start to slow down and result in lag. This is all assuming that i want to run at max, if not close to max settings with at least 60fps as a min.

keep in mind i am trying to plan this out so i can run these games at max in the future as well (the next 6 months at least anyways)
a c 203 à CPUs
July 9, 2010 5:34:32 AM

Not even the 5970 is going to get you 60+ FPS at 1920x1080 and max graphics and image quality filters in every game.
Check out that THG 5970 review linked above for more details on that.
July 9, 2010 5:34:34 AM

wolfram23 said:
As far as gaming goes you see little to no difference in gaming performance upgrading above a quad core i5 750. It OCs well, and with just a little OC it'll never hold up even very high end GPU set ups. I'm running CF 5850s that are OCed quite a bit no problem. Granted, at low res like 1280x1050 or w/e you can get some bottlenecking, but at normal 1920x1080 or thereabouts, the CPU will definitely not bottleneck.

The 5970 will be noticeably faster than a single 5870, however, I recommend saving a $100 and getting 2 5850s. From the results I've seen, 2 5850s are faster than a 5970 although it can potentially be better.


i have heard that the i5 750 OC's like a beast, however. I have never OC'd any components of my system before. Will i be able to successfully and safely OC my CPU with guidance and tips from browsing on line and advice from these forums?



And as a not to all those kind enough to reply with your awesome advice. CF 5850's are not an option for me. I can do CF 5770's (would i lose a substancial amount of performance vs one 5870/5970?) or i can do single 5870 or 5970.


Once more. Thank you so much for being welcoming and helping me figure this out =]
a c 203 à CPUs
July 9, 2010 5:37:57 AM

Help us out here.... you can CF 5770s but not CF 5850?
a c 131 à CPUs
July 9, 2010 5:46:30 AM

iamnewhere said:
keep in mind i am trying to plan this out so i can run these games at max in the future as well (the next 6 months at least anyways)

You still haven't said what games.

If you are looking at crysis, in order to get no lower than 60FPS, you'll still have to disable AA or at least lower it to x2. My friend has a 1920x1080 tv he plays on with a core i7 980x and two 5970s in crossfire.
This is the reason why I never bother considering anything past the most powerful single graphics card out there. I don't find lowering a few settings all that much of a problem. Then again, I'm still loving my 3870 so maybe I'm crazy :p  Although, I'm starting to think about getting a new card...

Anyway, if it were me, I would go with the 5870.
July 9, 2010 5:48:18 AM

WR2 said:
Help us out here.... you can CF 5770s but not CF 5850?



im not building my own pc... im buying alienware because i just got a bonus from work, therefore the 5850's are not a choice unfortunately.
July 9, 2010 5:49:15 AM

enzo matrix said:
You still haven't said what games.

If you are looking at crysis, in order to get no lower than 60FPS, you'll still have to disable AA or at least lower it to x2. My friend has a 1920x1080 tv he plays on with a core i7 980x and two 5970s in crossfire.
This is the reason why I never bother considering anything past the most powerful single graphics card out there. I don't find lowering a few settings all that much of a problem. Then again, I'm still loving my 3870 so maybe I'm crazy :p  Although, I'm starting to think about getting a new card...

Anyway, if it were me, I would go with the 5870.


i am refering along the lines of the new Call of Duty coming out, the new Medal of Honor, and Battlefield BC 2.
i am willing to not play at max settings, like AA/AF turned of or AA at 2x or something, but i don't want to be playing on anything lower than max settings for most games. Im thinking that the 5870 single card would suffice for now, and then later on down the road i could add another and CF them...? would that be smarter than blowing 600 on a 5970?

BTW, for all the replies to any of my previous messages, its pretty clear that i should go with the i5 750, tyvm for all your help.
Also, since i suck at this, would 6gigs of dual channel DDR3 memory @ 1333MHz be sufficient for gaming? or is 4 enough? any help would be great =]
a b à CPUs
July 9, 2010 5:52:09 AM

A single 5970 is just too much for a single monitor @ 1900X1200. It's like Schumacher in a Ford; you have to put him in a Ferrari.
A 5870 would be enough for your gaming needs @ that resolution. Or a gtx 480, if you don't mind the price difference & the power draw, or heat, or noise.
Think about the 5970 only if you have a 30" screen @ 2560X1650 or something. Or if you go Eyefinity.
a c 203 à CPUs
July 9, 2010 5:53:10 AM

Sure, that makes sense now. What power supply do you get in the 5870 model? Large enough to think about adding a 2nd 5870?

CF 5770s would do 'OK' at 1920x1080 but fall short of your 60+ @ max settings goal. Some games would need to dial back on the max quality settings to get good frame rates.
a c 131 à CPUs
July 9, 2010 5:58:16 AM

4GB should be enough, but I would get 6 in this day and age. I think the age of "4GB sweet spot" is coming to an end.
July 9, 2010 5:58:24 AM

WR2 said:
Sure, that makes sense now. What power supply do you get in the 5870 model? Large enough to think about adding a 2nd 5870?

CF 5770s would do 'OK' at 1920x1080 but fall short of your 60+ @ max settings goal. Some games would need to dial back on the max quality settings to get good frame rates.


stock PSU is 875, should be alright. and referring to ksampanna said, would the gtx 480 be better than a 5870 performance wise?

also any help with the ram question i posted in response to Enzo would be great if you are knowledgeable on the subject.
July 9, 2010 6:00:44 AM

wolfram23 said:
As far as gaming goes you see little to no difference in gaming performance upgrading above a quad core i5 750. It OCs well, and with just a little OC it'll never hold up even very high end GPU set ups. I'm running CF 5850s that are OCed quite a bit no problem. Granted, at low res like 1280x1050 or w/e you can get some bottlenecking, but at normal 1920x1080 or thereabouts, the CPU will definitely not bottleneck.

The 5970 will be noticeably faster than a single 5870, however, I recommend saving a $100 and getting 2 5850s. From the results I've seen, 2 5850s are faster than a 5970 although it can potentially be better.


can you describe the bottlenecking you are reffering to at low res's. This is for the i5 750 correct? if i played on a tiny 15' monitor at 1024x769, that would make the i5's performance go to hell?
July 9, 2010 6:04:01 AM

the conclusion is that. You will no need more than 2 core with most of GAMES. So this concludes these two cpus will not really make a different at all. The only thing you may consideer is ocinng your cpu with a decent 3.5ghz+ core speed to have a better perfomance experience.

And as for games. A 5870 will gladly do the job. IMO you shouldnt waste your money on 5890. And enjoy your system.

Ohh one more thing. Welcome to tomshardware
July 9, 2010 6:08:57 AM

jeyd02 said:
the conclusion is that. You will no need more than 2 core with most of GAMES. So this concludes these two cpus will not really make a different at all. The only thing you may consideer is ocinng your cpu with a decent 3.5ghz+ core speed to have a better perfomance experience.

And as for games. A 5870 will gladly do the job. IMO you shouldnt waste your money on 5890. And enjoy your system.

Ohh one more thing. Welcome to tomshardware



quick to the point! thanks for the welcome. is learning how to safly OC your cpu a fairly simple thing to do???
a c 131 à CPUs
July 9, 2010 6:12:15 AM

jeyd02 said:
the conclusion is that. You will no need more than 2 core with most of GAMES. So this concludes these two cpus will not really make a different at all. The only thing you may consideer is ocinng your cpu with a decent 3.5ghz+ core speed to have a better perfomance experience.

It's actually 3 cores. 2 cores was gaming like 2-3 years ago. Overclocking would not increase performance as they are already more than powerful enough to handle anything except maybe FSX.

jeyd02 said:
And as for games. A 5870 will gladly do the job. IMO you shouldnt waste your money on 5890. And enjoy your system.

You mean 5970, but yeah +1
July 9, 2010 6:14:45 AM

Best answer selected by iamnewhere.
a c 131 à CPUs
July 9, 2010 6:16:31 AM

iamnewhere said:
quick to the point! thanks for the welcome. is learning how to safly OC your cpu a fairly simple thing to do???

If you don't overclock enough to have to fiddle with the voltage, then it is as simple as increasing the FSB a bit and then checking for stability. For stability, run 30 times of the 2048mb test in the program "linx", then run prime95 (32-bit or 64-bit, depending on OS) for 12 hours. Some may call me too thorough, but I certainly don't want any instabilities.
For that kind of overclock, I would reasonably expect no more than a 20% overclock.
July 9, 2010 6:20:12 AM

enzo matrix said:
If you don't overclock enough to have to fiddle with the voltage, then it is as simple as increasing the FSB a bit and then checking for stability. For stability, run 30 times of the 2048mb test in the program "linx", then run prime95 (32-bit or 64-bit, depending on OS) for 12 hours. Some may call me too thorough, but I certainly don't want any instabilities.
For that kind of overclock, I would reasonably expect no more than a 20% overclock.


yea sounds good, i think i will worry about getting my pc and making sure i have the best configuration of parts for what i will be using it for before i get into overclocking and tweaking =] thanks for everything guys.


oh also, do you think 875 watts is enough to cover CF 5870's down the road?
a b à CPUs
July 9, 2010 2:35:05 PM

iamnewhere said:
can you describe the bottlenecking you are reffering to at low res's. This is for the i5 750 correct? if i played on a tiny 15' monitor at 1024x769, that would make the i5's performance go to hell?


I noticed it in FurMark. Comparing a single 5850 to CF 5850s, I did a windowed test at (iirc) 1280x1050. The FPS difference between 1 and 2 GPUS was 5. I then pushed the res up to 1920x1080 and then the difference was about 60fps (It showed an 82% increase with 0xAA, and 88% increase with 4xAA).


IMO, a 5870 will suffice. If you're unhappy in a few months you can go out and buy a second one. But it'll be good. I played with high settings on a single 5850, and a 5870 is quite a bit faster. If you can, it might be worthwhile to get a GTX 480 instead as it does perform well (even tho it's hot and power hungry - or maybe because of that).


As for OCing, it's quite easy. If you buy 1600 mhz RAM, then it's the easiest thing in the world to just change your base clock from 133 to 160 and that will get the RAM running at speed and give you a nice 567mhz increase (648mhz with turbo) over stock. I'm currently running at 175 base clock (3.68ghz, 4.2ghz with turbo) and my 1600 CL8 RAM at 1400 CL7 (basically the same speed overall). It wasn't that hard to accomplish. And yeah there's lots of guides on it just do a little searching. You'll find plenty of threads here on toms.
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