My old desktop i7 920 rig has a BFG 285 OC installed, and the laptop I'm getting (Apple RMBP) has a 650M. From the limited benchmarks I've looked into it would appear the 650M is about 75% as powerful as a 285. Does that sound about right to everyone?
Could be an overestimate - feels like it, but I admit I haven't been clued in to the state of laptop graphics for quite a while!
The 650M has 384 cores, 60% more than the 240 on the 285. It is approx 20% faster and built using later techcnology, so a little math shows the 650M should be around twice as fast as the 285.
Comparing core count across different generations is madness afaik. Memory bandwidth, bus width and all that makes a difference as well as the core manufacturing process.
Hmmm I feel counting cores on a GPU is as much use as counting valves in an engine... kind of linked to performance but don't use it exclusively! Directly comparitive benchmarks I haven't seen but from different sources I've found 3DMark Vantage benchmarks with (about) 13,000 for the 285 and 10,000 for the 650m
Laptop GPU's and CPU's are always waaaayyy behind desktop version in term of performance. All you get are the new feature (more cores, or latest DirectX and OpenGL, etc..). An example of this, depending on what you do, but Intel's latest Core 2 Duo processor for laptop is about as powerful as the AMD Athlon 64 X2 4400+ on Socket 939, a 2005 chip.
Exactly! When I got my 9600M GT laptop was when I realised just how much I was compromising against a simple desktop. Despite the age, I am pretty sure the 650M is quite less than the 75% estimate above. Unless Nvidia pulled something fantastic with the 650M, but I'm doubtful
Tbh i would think even less than that. I doubt you could get any where near a 285s performance i a laptop currently if battery life and thermals are a concern.
It has been quite a while since the Core 2 Duo was top of the line in the mobile sector. A more recent example would be the - not top of the range - i7 3720QM, a quad core mobile chip with HT, running at a nominal 2.6Ghz and turbos to 3.6Ghz on a single core, 3.5Ghz on two cores and 3.4Ghz on all four cores. The i7 3820QM & i7 3920QXM are even faster again. All three compare favourable with the i7 3770K desktop processor (3.5-3.9Ghz). Even the entry level quad, the i 7 3610QM runs at 2.3Ghz and can turbo to 2.9Ghz on all four cores. Granted things arn't quite as close in the GPU space, however the gap is closing, especially in the mid range. The GT650M with GDDR5 is roughly as fast as a desktop HD6770 allowing for a margin of error. Factor in significant power savings and a newer more efficient archtecture and the 650M compares very favourably with the GTX285. To put it another way the performance delta between the two won't allow playability on one whilst not offering it on the other - driver issues aside of course. Now rather annoyingly Nvidia also offer the GT650M with DDR3 memory, effectively halving its memory bandwidth. This will lead to a significant drop in performance - dropping it from GTX560M territory to GT555M (144) territory. At the top end the latest power saving archtectures from AMD and Nvidia are allowing performance to increase dramatically. The HD7970M may not be a 2048 shader monster but it still offers up near HD7870 performance which itself is only marginally slower than the GTX570 desktop card. The GTX680M is going to be a 1344 shader brute which in effect is just a GTX670 downclocked. Both cards are offering performance that is 50% or more faster than the previous top end mobile parts, all at the same power consumption.
Yeah Bindi seemed to be under the impression that 680M ~ 560Ti performance wise. A good time to be buying a high end laptop.
I didn't think these days things were quite as bad as this? Well not on the CPU side of things. EG Looking at http://browser.primatelabs.com/mac-benchmarks The i7-3820QM in the new retina Macbook Pro on 64bit tests is only bested by a handful of hex core and dual-quad core Mac Pro desktops. A geekbench score of 13397 while just a benchmark score is still a pretty good score for a laptop (IMHO). Mobile GPUs will always lag behind desktop though. No easy way around that unless you throw desktop parts in a mobile chassis (Eeek!). http://www.barefeats.com/mbp12gx.html Hey, all I was wondering is whether or not I'll be able to game on my RMBP when it arrives. Looks like I will, but maybe not with the same settings as I have done so on my desktop i7/285 combo. Thanks all.
