bit-tech.net

Zotac GeForce GTX 560 Ti 448 Core Limited Edition Review

Zotac GeForce GTX 560 Ti 448 Core Limited Edition Review

Manufacturer: Zotac
UK Price (as reviewed): £239.47 (inc VAT)
US Price (as reviewed): $TBC (ex tax)

It’s been over a year since Nvidia’s first GF110 GPU rolled into our labs, when the GTX 580 1.5GB promptly demolished all single-GPU graphics card opposition and remained at the top of our benchmarks for over 12 months.

A year on, though, and there have been disappointingly few GPU developments in 2011. The GTX 560 Ti 1GB’s appearance in January and the dual-GPU showdown between the GTX 590 3GB and HD 6990 4GB in March rounded out this generation of GPUs, leaving us looking forward with anticipation to winter and the prospect of smaller, more efficient and more powerful GPUs.

While the big games arrived by the truckload in the form of BF3, Skyrim and Batman Arkham City, both AMD and Nvidia have remained eerily silent when it comes to news of new GPUs. Come back in 2012 we’re told; there’ll be nothing more in 2011.
The GeForce GTX 560 Ti 448 Core's GPU has two disabled SMs

The GeForce GTX 560 Ti 448 Core's GPU has two disabled SMs


Imagine our surprise, then, when Nvidia unveiled its latest GPU, the GTX 560 Ti 448 Core, just in time for Christmas. Sadly it’s not a brand new GPU architecture, though, and despite its GTX 560 Ti name, it isn't even based on the GF114 GPU of its namesake.

Instead, the GTX 560 Ti 448 Core is built using the larger, more power hungry GF110 GPU; the full-size Fermi GPU found in both the GTX 580 1.5GB and GTX 570 1.3GB. Just as the GTX 570 1.3GB is a cut down version of the GTX 580 1.5GB, the GTX 560 Ti 448 Core takes another bite from the GPU, disabling another streaming multi-processor (SM) and dropping the stream processor count down to, you guessed it, 448.

If that sounds familiar, it’s because it’s the same shader count and architecture layout as the GTX 470 1.3GB from back in March 2010, only with the power and thermal enhancements from using low leakage transistors shared across the GTX 5xx series.

As well as dropping the stream processor count, the scrapped SM also means fewer texture units (56 compared to the 60 of the GTX 570 1.3GB) and one less tessellation unit.

Other than the disabled SM though, the GTX 560 Ti 448 Core is very similar to the GTX 570 1.3GB. They share the same stock clock speeds; a core frequency of 732MHz and memory frequency of 950MHz (3.8GHz effective). As both cards also have one of their six memory controllers disabled, this means the GTX 560 Ti 448 Core also boasts the same 1,280MB (1.3GB) of GDDR5 memory as its more auspicious stablemate.

*Zotac GeForce GTX 560 Ti 448 Core Limited Edition Review Zotac GeForce GTX 560 Ti 448 Core Limited Edition Review *Zotac GeForce GTX 560 Ti 448 Core Limited Edition Review Zotac GeForce GTX 560 Ti 448 Core Limited Edition Review
Click to enlarge

Specifications

 Nvidia GeForce GTX 580 1.5GBNvidia GeForce GTX 570 1.3GBNvidia GeForce GTX 560 Ti 448 Core 1.3GBNvidia GeForce GTX 560 Ti 1GBATI Radeon HD 6970 2GBATI Radeon HD 6950 2GB
GPU
CodenameGF110GF110GF110GF114Cayman XTCayman Pro
Frequency772MHz732MHz732MHz822Mhz880MHz800MHz
Stream Processors512 (1,544MHz)480 (1,464MHz)448 (1,464MHz)384 (1,640Mhz)1,536 (880MHz)1,408 (800MHz)
Layout16 SMs, 4 GPCs15 SMs, 4 GPCs14 SMs, 4GPCs8 SMs, 2GPCs24 SIMD Engines22 SIMD Engines
Rasterisers444222
Tessellation Units161514822
Texture Units646056649688
ROPs484040323232
Transistors3bn3bn3bn1.95bn3.6bn2.6bn
Size520mm²520mm²520mm²360mm²389mm²389mm²
Process40nm40nm40nm40nm40nm40nm
Memory
Amount1.5GB GDDR51,280MB GDDR51,280MB GDDR51GB GDDR52GB GDDR52GB GDDR5
Frequency1.02GHz (4.08GHz effective)950MHz (3.8GHz effective)950MHz (3.8GHz effective)1GHZ (4GHz effective)1.375GHz (5.5GHz effective)1.25GHz (5GHz effective)
Interface384-bit320-bit320-bit256-bit256-bit256-bit
Bandwidth192.4GB/sec152GB/sec152GB/sec128GB/sec176GB/sec160GB/sec
Card Specifications
Power Connectors1 x 6-pin 1 x 8-pin PCI-E2 x 6-pin PCI-E2 x 6-pin PCI-E2 x 6 PCI-E1 x 6-pin, 1 x 8-pin2 x 6-pin PCI-E
Maximum Power Draw244W219W219W180W250W225W
Idle Power DrawUnknownUnknownUnknownUnknownUnknownUnknown
Recommended PSU550W550W550W500WUnknownUnknown
Typical Street Price£400£270£240£200£300£230