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GeForce GTX 780M, 770M, And 765M: Scaling Vs. Radeon HD 8970M

GeForce GTX 780M, 770M, And 765M: Scaling Vs. Radeon HD 8970M
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We already have a really good idea how desktop-bound graphics cards perform. But what about the mobile hardware typically derived from those same GPUs? We test four identically-configured notebooks and show how they scale in six popular games.

Sometimes it's hard to know how a mobile graphics processor will perform based on its name alone. Both AMD and Nvidia refer to their mobile solutions using branding very similar to their desktop parts. To help us nail down expectations of its fastest laptop GPUs, Nvidia sent over ten grand worth of Origin PC notebooks armed with GeForce GTX 780M, GeForce GTX 770M, and GeForce 765M cards. 

I also wanted a bit of relativity, though. So I called up the folks at Eurocom for something comparable based on AMD's top-end graphics processor.

Origin PC recently unveiled its Genesis and Millennium cases, which were custom-designed for the company's gaming-oriented desktop PCs. Fortunately for us, though, Origin's Eon17-S uses Clevo’s P177SM chassis, which meant that Eurocom could send over a comparable system with a Radeon HD 8970M-based module with the same cooling system. An identical thermal solution is one more way we can give you benchmark results that are truly apples-to-apples.

Comparing Mobile GPUs

GPU-Z reports lower clock rates for Nvidia’s mobile GeForce modules than the manufacturer specifies, though that's likely a result of running at lower idle frequencies. Similarly, we had to load down the Radeon module with a 3D task to get its clock settings to show up at all.

A quick look at the GeForce GTX 780M’s specifications shows that it's derived from the same GK104 GPU used for several of Nvidia's desktop-oriented cards. Naturally, the company uses lower core and memory clock rates to bring wattage down to levels that are manageable in the confines of a notebook chassis. 

In case you're not familiar with the name of Nvidia's GeForce GTX 760 Ti in the chart below, it's an OEM-rebrand of the GeForce GTX 670.

Nvidia GeForce GTX 700-Series Specs
 GeForce GTX 780GeForce GTX 780MGeForce GTX 770MGeForce GTX 765MGeForce GTX 760 Ti (670)
Shaders230415369607681344
Texture Units1921288064112
Full Color ROPs4832241632
Graphics Clock MHz
(Boost)
863823811850915
Texture Fillrate166 Gtex/s105.3 Gtex/s64.9 Gtex/s54.4 Gtex/s102.5 Gtex/s
Memory Clock1502 MHz1250 MHz1000 MHz1000 MHz1502 MHz
Memory Bus384-bit256-bit192-bit128-bit256-bit
Memory Bandwidth288 GB/s160 GB/s96 GB/s64 GB/s192 GB/s
Graphics RAM3 GB GDDR54 GB GDDR53 GB GDDR52 GB GDDR52 GB GDDR5
Die Size561 mm²294 mm²221 mm²221 mm²294 mm²
Transistors (Billion)7.13.542.542.543.54
Process Technology28 nm28 nm28 nm28 nm28 nm
Price$500
~$750~$400~$300~$300

AMD’s Radeon HD 8970M is also the product of recycled naming, though more severely. Once upon a time, this exact configuration was called the Radeon HD 7970M, though it was based on the desktop Radeon HD 7870. AMD makes big cuts in power consumption by underclocking the Pitcairn GPU sitting on its flagship notebook module.

AMD Radeon HD 8000-Series Specs
 Radeon HD 8970/7970 [280X]Radeon HD 8970MRadeon HD 7970MRadeon HD 7870
Shaders2048128012801280
Texture Units128808080
Full Color ROPs32323232
Graphics Clock MHz
(Boost)
1000 (1050) [850/1000]850 (900)8501000
Texture Fillrate128 Gtex/s [109]68 Gtex/s68 Gtex/s80 Gtex/s
Memory Clock1500 MHz1200 MHz1200 MHz1200 MHz
Memory Bus384-bit256-bit256-bit256-bit
Memory Bandwidth288 GB/s154 GB/s154 GB/s154 GB/s
Graphics RAM3 GB GDDR54 GB GDDR54 GB GDDR52 GB GDDR5
Die Size352 mm²212 mm²212 mm²212 mm²
Transistors (Billion)4.32.82.82.8
Process Technology28 nm28 nm28 nm28 nm
Price$400~$500~$500$200
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  • 1 Hide
    swamprat , 4 February 2014 12:24
    If the next round of APUs is sorting out the stuttering issues then it could be interesting to see how APU+GPU compares in mid-range laptops
  • 1 Hide
    fatboyslimerr , 4 February 2014 15:35
    and my 2 year old 7970m is right up there with current gen, in my 4 year old AW M15x :)