I got a refurbished laptop (HP dv7-4183cl) with Windows 7. It was snappy and fast. Unfortunately it had hardware problems and HP very generously replaced it with a bigger, better, faster (I thought) laptop, a dv7-6199us.
The first laptop had a Core i5-460M processor (2.53GHz) with 2 cores and 6GB of RAM. The new one has a Core i7-2670QM (2.2GHz) with 4 cores and 8GB of RAM.
I never had them side-by-side so I couldn’t do any careful comparisons, but the new Core i7 laptop is noticeably, significantly more sluggish than the Core i5. The first laptop felt snappy and responsive, but the new one feels slow. Boot-up takes longer, starting up processes takes longer, and virtual machines in VMware Workstation are really slow.
The native speed of the Core i7 is 13% slower, but a) it feels more than 13% slower, and b) I assumed the slower clock rate would be compensated by improved architecture in the i7. Apparently not.
The i7 has more cores but even though I’m a power user — I typically have 15-20 apps running including 2-4 VMs running in VMware — I seldom have 4 cores cranking at more than 10-20%. The CPUs are slackin’. I have no idea why it feels so slow.
I *do* push things RAM-wise. Right now Task Manager says I’m using 6.85GB out of my 8, and presumably Windows has grabbed the rest of it. But I don’t think RAM could be the issue, because e.g. boot-up seems slow too.
What could cause an i7 quad-core to feel more sluggish than an i5 dual-core?
Gary