Help me decide: E5470 or E7450?

to be fair, it only throttled on that Prime95 in-place FFT (max heat generation)

If I do one of the easier tests, CPU still stays at 35W + ~90degC & 100%, but the clock speed goes between 2.8-3.3ghz

just worried about CPU idle at 45 (base is around 38-40C). I saw a non-english review that said their quad-core E5470 was fine, trying to find it

edit: google translate this
http://notebook.cz/clanky/recenze-notebook/2016/dell-latitude-5470-quad-core

 

Coming from an E5450 (which I really love), I'd go for the E5470 with a nice FHD IPS panel. The E7450 is also very nice and imo better than the current E7470 (with that horrible Vaio-Thinkpad-let's-screw-everything-against-the-keyboard design). E5470 for battery runtime and traditional 2.5" usage.

 

Get the e5470. weighs slightly more than the e7450, but it has better battery life with the 62 whr battery option and can accept PCIE ssd drive and a 2nd m.2 42mm drive.

 

Back again with an update

I'd just like to say thank you again to all that helped me decide between the 5470 & 7450. In the end I went for ... the ... errrrr ... 5570

I thought about it some more, and the suggestion to bump up the screen size to 15" was a good one - much better for sharing a screen with someone. I spotted a deal on the Outlet Store for a quad core i5 (iGPU, 6 cell battery, FHD, m.2 ssd) and went for it. It seems like new, and a nice price as well.

Is it massive? Yeah, it's pretty big, but I think I'm happy with the trade off. And going for a quad core, I thought the extra air flow from a bigger chassis/fan set up might help things along a bit (?!).

I haven't used it as an angry development machine yet, but for everyday tasks it seems very snappy.

 

I was happy with my E5510 except that I couldn't adjust to the offset keyboard because of the numpad. So I've now got a Precision 5510 in front of me which is arguably more powerful than I need but has a central keyboard. It's also a bit smaller and about 0.4kg lighter.

However, the E5570's fan is quieter although the Precision has to be given some significant work to do before the fans get noisy.

John

 

Only one review of the E5570 that I've read even mentioned heat. Laptop Mag's review unit had the quad-core i7-6820HQ. The only area that exceeded their normal threshold was the bottom. Under extended load, it reached 102 degrees and they consider anything over 95 higher than normal. The keyboard and touchpad both remained cool.

If anything, you might want to get a notebook cooler to keep the temp down a bit when you think you will be putting the system under stress for long periods. But overall, it shouldn't be a problem.

You definitely got a lot more processing power than you would have in the E7450 (or the E5xxx-series with a U-series low-voltage processor).

 

It did feel a little weird having the trackpad offset to the left, I'd agree, but I'm getting used to it, and I think I'll be fine with it. I can see a mouse plugged in a lot of the time, anyway.

I decided to try and turn the addition of the numpad into something useful to me, rather than just a mass of unused keys taking up a big chunk of my keyboard area. I've re-mapped a number of them, and am actually really liking my new, massive, page up/down buttons

Mostly the machine is very quiet, but I'm definitely getting a whine sometimes. Is there a recommended way to fix this?

I've done a bit more testing of the processing power of the laptop, and it seems that it's really quite a little beast. Excellent.

I don't seem to have been running into any major heat problems, and the fan rarely comes on under everyday use. As has been pointed out before, the only real hotspot is underneath, towards the front left, and, when I've noticed it, it's invariably when I've been partially blocking the air inlet underneath.


Guys, I seem to be wandering off topic here, which thread would be best to ask a few questions about tweaking/configuring the E5570? Or start a new one?

Aaron

 

1. The whine problem seems to be a lottery. Turning off C states in the BIOS may fix it but will hit the battery run time.

2. The worst case heat situation I noticed was when the CPU was under moderate usage but not enough to get the fan running. In this case the fan end of the heat pipe would get quite warm and that's the bit of the computer which rests on the left knee when used as a laptop.

There is an E5570 discussion so that would be the logical place for you to ask your questions.

John

 

Thanks John, I'll take a look at C-states ... ???

Just as an aside, I see you bought your machine from Dell Outlet as well - did they provide you with a Windows 7/10 disc, or is one supposed to download a disc image? Before I start really messing about with it I'd like to have a good path back to the original install, or maybe even better, a clean install of Windows.

Aaron

 

Dell didn't provide any disc (it would need to be a flash drive these days anyway) but in the downloads for the tag number is a multi-GB operating system file. However, when I did a new Windows installation on the SSD I put in to E5570 I used a standard Windows 10 installer on a flash drive created using Microsoft's media creation tool and then installed the drivers and software which I wanted which Windows 10 hadn't done (it's quite good at the drivers).

A description of the boot work-around was in this forum somewhere. It's probably this.

John