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Worth the extra money for Sandy Bridge? - Page 2

post #11 of 23
It depends how much you're saving at the end of the day. I was in the same situation but I took the P55 deal because of the offer. This was my situation
post #12 of 23
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Quote:
Originally Posted by drBlahMan View Post
It depends how much you're saving at the end of the day. I was in the same situation but I took the P55 deal because of the offer. This was my situation
Whoa... that is one epic deal

I'll be selling my current hardware to upgrade, which should get me about £120, plus I already have £110 in cash, but I'll wait until I have around £150 or so before thinking more about upgrading, that way I can get some better stuff. That won't be enough for a 2500K though
post #13 of 23
With limited overclocking and Turbo, the i5-2300 will likely hit 3.3/3.4/3.4/3.5 (4/3/2/1). With an average 10% difference clock for clock over the i5-7x0, that's just roughly equivalent to 3.63 GHz on the i5-7x0 when all 4 cores are active and 3.74 with 2. The i5-2400 is a bit more respectable at 3.6/3.7/3.7/3.8 so around 3.96 GHz on i5-7x0 with 4 cores and 4.07 with 2.

I guess it really depends on how far you want to push the overclocks. It will be very easy to get 3.3 GHz on the i5-2300 as it is 3.6 GHz on the i5-7x0. You probably won't even have to touch any voltages. Getting to 4 GHz on Lynnfield would require a bit more tweaking. Imho, go for i5-2400 minimum. It should only cost 10 more bucks than the i5-2300 and I reckon getting 3.6 GHz from the i5-2400 will be a darned sight easier than getting 4 GHz from the i5-7x0.

Basically, between i5-2300 and i5-760, go i5-2300 if you only plan on oc'ing the i5-760 to ~3.6 GHz or less, or if planning to run stock. If you plan on oc'ing to ~4 GHz, get an i5-760 if you can't afford an i5-2400. However, you should really aim to save a few more bucks to get the i5-2500K.
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post #14 of 23
Thread Starter 
Quote:
Originally Posted by rui-no-onna View Post
With limited overclocking and Turbo, the i5-2300 will likely hit 3.3/3.4/3.4/3.5 (4/3/2/1). With an average 10% difference clock for clock over the i5-7x0, that's just roughly equivalent to 3.63 GHz on the i5-7x0 when all 4 cores are active and 3.74 with 2. The i5-2400 is a bit more respectable at 3.6/3.7/3.7/3.8 so around 3.96 GHz on i5-7x0 with 4 cores and 4.07 with 2.

I guess it really depends on how far you want to push the overclocks. It will be very easy to get 3.3 GHz on the i5-2300 as it is 3.6 GHz on the i5-7x0. You probably won't even have to touch any voltages. Getting to 4 GHz on Lynnfield would require a bit more tweaking. Imho, go for i5-2400 minimum. It should only cost 10 more bucks than the i5-2300 and I reckon getting 3.6 GHz from the i5-2400 will be a darned sight easier than getting 4 GHz from the i5-7x0.

Basically, between i5-2300 and i5-760, go i5-2300 if you only plan on oc'ing the i5-760 to ~3.6 GHz or less, or if planning to run stock. If you plan on oc'ing to ~4 GHz, get an i5-760 if you can't afford an i5-2400. However, you should really aim to save a few more bucks to get the i5-2500K.
Thanks for this. I had forgotten that the turbo frequency changes with the amount of cores that are in use as well.

It's not that I would only try and overclock a 760 to 3.6GHz, it's that I won't be able to afford a really nice cooler so I don't think I'd be able to keep it at 4.0GHz. I'm also not sure I'd be able to afford a nice enough motherboard to achieve that much of an overclock.

One thing that I've really been wondering though: if all you can overclock on Sandy Bridge is the turbo frequency, why don't you just say that that's how fast it is anyway? Why don't we just say that the 2300 is a 3.1GHz CPU if that's what speed it will be running at when you place any load on it?
post #15 of 23
IMO, Keep your Lynnfield.

The only chip worth upgrading from your i5 760, is to the i7 2600k.

In gaming, you still wouldn't notice the difference.

Now is a good time to snatch up deals on used 1156 and 1366 gear.
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post #16 of 23
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Quote:
Originally Posted by norcaljason View Post
IMO, Keep your Lynnfield.

The only chip worth upgrading from your i5 760, is to the i7 2600k.

In gaming, you still wouldn't notice the difference.

Now is a good time to snatch up deals on used 1156 and 1366 gear.
Yo, read the OP and look at my sigrig
post #17 of 23
The i5-2500k (Or the i7-2600k, I forget) has gone to 4.4GHz stable with the stock air cooler. You don't need to worry about "extreme cooling" with SB. It will OC farther and easier than anything else. I wouldn't think twice about getting the i5-2500k and pushing over 4 GHz with it. You won't be disappointed.
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post #18 of 23
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So having a turbo of 4GHz might as well be the same as having a standard speed of 4GHz?
post #19 of 23
Quote:
Originally Posted by ellisbodds View Post
One thing that I've really been wondering though: if all you can overclock on Sandy Bridge is the turbo frequency, why don't you just say that that's how fast it is anyway? Why don't we just say that the 2300 is a 3.1GHz CPU if that's what speed it will be running at when you place any load on it?
Because then, it's possible it would exceed Intel's rated TDP at whatever extreme situations they test it at.

Quote:
Originally Posted by ellisbodds View Post
So having a turbo of 4GHz might as well be the same as having a standard speed of 4GHz?
Not really. Again, Turbo varies depending on the number of active cores. For locked processors that can only overclock by 400 MHz (+Turbo), yeah, that's pretty much guaranteed. CPU multipliers on unlocked processors can go up to 57x for a theoretical 5.7GHz but most would opt for an easy 4.4~4.5GHz overclock.
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post #20 of 23
Thread Starter 
Quote:
Originally Posted by rui-no-onna View Post
Because then, it's possible it would exceed Intel's rated TDP at whatever extreme situations they test it at.


Not really. Again, Turbo varies depending on the number of active cores. For locked processors that can only overclock by 400 MHz (+Turbo), yeah, that's pretty much guaranteed. CPU multipliers on unlocked processors can go up to 57x for a theoretical 5.7GHz but most would opt for an easy 4.4~4.5GHz overclock.
Ah I see

Are the rated turbo frequencies (3.1 for the 2300 etc.) for all four cores then?

But would you say that on the stock cooler or a cheap aftermarket, I'd be able to get the 2500K to 4.0GHz with all 4 cores?
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