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GeForce GTX 660 Ti vs Tesla K20m

CPUCPUGPUGPU
NVIDIA

GeForce GTX 660 Ti

2012Core: 915 MHzBoost: 980 MHz
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VS
NVIDIA

Tesla K20m

2013Core: 706 MHz
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GeForce GTX 660 Ti vs Tesla K20m Performance Spectrum

GeForce GTX 660 Ti
3 GB 150
4,415
0.0%
brand logoGeForce GT 1030
brand logoGeForce GTX 675MX
brand logoGeForce GTX 650 Ti BOOST
brand logoGeForce GTX 775M Mac Edition
brand logoGeForce GTX TITAN Z
brand logoGeForce RTX 3060 Laptop GPU
brand logoRTX 2000 Ada Generation
brand logoGeForce RTX 2080 Ti
Tesla K20m
2 GB 225
4,432
+0.4%
brand logoGeForce GT 1030
brand logoGeForce GTX 675MX
brand logoGeForce GTX 650 Ti BOOST
brand logoGeForce GTX 570
brand logoGeForce GTX TITAN Z
brand logoGeForce RTX 3060 Laptop GPU
brand logoRTX 2000 Ada Generation
brand logoGeForce RTX 2080 Ti

About G3D Mark

G3D Mark is a standard benchmark that measures graphics performance in real-world gaming scenarios. It simplifies comparing cards from different brands, where higher scores directly correlate with better fps and smoother gaming experiences.

GeForce GTX 660 Ti vs Tesla K20m: Pros, Cons & Final Verdict

See where each GPU makes more sense in practice: raw FPS, VRAM, features, power draw, pricing, and long-term headroom.

GeForce GTX 660 Ti

2012

Why buy it

  • ✅Costs $2,900 less on MSRP ($299 MSRP vs $3,199 MSRP).
  • ✅Delivers 965.8% more G3D Mark for each dollar spent, at 14.8 vs 1.4 G3D/$ ($299 MSRP vs $3,199 MSRP).
  • ✅50% more VRAM for high-resolution textures and newer games (3 GB vs 2 GB).
  • ✅Draws 150W instead of 225W, a 75W reduction.

Trade-offs

  • ❌2012 hardware with 3 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.

Tesla K20m

2013

Why buy it

  • ✅Competitive enough if your priority is price, power, or specific feature preference.

Trade-offs

  • ❌Less VRAM, with 2 GB vs 3 GB for high-resolution textures and newer games.
  • ❌2013 hardware with 2 GB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
  • ❌
    969.9% HIGHER MSRP
    $3,199 MSRPvs$299 MSRP
  • ❌Lower G3D Mark per dollar, at 1.4 vs 14.8 G3D/$ ($3,199 MSRP vs $299 MSRP).
  • ❌50% higher power demand at 225W vs 150W.

Quick Answers

Which GPU is faster for gaming right now?
Tesla K20m is the faster gaming card right now based on the synthetic data we have. It leads by 0.4% in PassMark G3D (4,432 vs 4,415), which is the best performance signal available in this matchup.
Which GPU is the safer long-term pick for 2026 and beyond?
GeForce GTX 660 Ti is the safer long-term pick for 2026 and beyond. The case is simple: 3 GB vs 2 GB of VRAM. That gives it more room for heavier textures and higher settings over time.
Which GPU is the better buy today?
GeForce GTX 660 Ti makes the most sense to buy today. It is $2,900 cheaper on MSRP at $299 vs $3,199, and it leads G3D-per-dollar by 965.8% (14.8 vs 1.4), which is enough to swing the recommendation its way. Tesla K20m still makes more sense if max raw gaming performance matters more than value.

GeForce GTX 660 Ti vs Tesla K20m Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

NVIDIA

GeForce GTX 660 Ti

The GeForce GTX 660 Ti is manufactured by NVIDIA. It was released in August 16 2012. It features the Kepler architecture. The core clock ranges from 915 MHz to 980 MHz. It has 1344 shading units. The thermal design power (TDP) is 150W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 4,415 points. Launch price was $299.

NVIDIA

Tesla K20m

The Tesla K20m is manufactured by NVIDIA. It was released in January 5 2013. It features the Kepler architecture. The core clock speed is 706 MHz. It has 2496 shading units. The thermal design power (TDP) is 225W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 4,432 points. Launch price was $3,199.

⚡

Graphics Performance

The GeForce GTX 660 Ti scores 4,415 and the Tesla K20m reaches 4,432 in the G3D Mark benchmark — just a 0.4% difference, making them near-identical in rasterization performance. The GeForce GTX 660 Ti is built on Kepler while the Tesla K20m uses Kepler, both on a 28 nm process. Shader units: 1,344 (GeForce GTX 660 Ti) vs 2,496 (Tesla K20m). Raw compute: 2.634 TFLOPS (GeForce GTX 660 Ti) vs 3.524 TFLOPS (Tesla K20m).

FeatureGeForce GTX 660 TiTesla K20m
G3D Mark Score
4,415
4,432
Architecture
Kepler
Kepler
Process Node
28 nm
28 nm
Shading Units
1344
2496+86%
Compute (TFLOPS)
2.634 TFLOPS
3.524 TFLOPS+34%
ROPs
24
40+67%
TMUs
112
208+86%
L1 Cache
112 KB
208 KB+86%
L2 Cache
0.38 MB
1.25 MB+229%
✨

Advanced Features (DLSS/FSR)

The GeForce GTX 660 Ti gets NVIDIA DLSS, which still tends to look cleaner in motion. The Tesla K20m leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

FeatureGeForce GTX 660 TiTesla K20m
Upscaling Tech
Upscaling support
Upscaling support
Frame Generation
Not Supported
Not Supported
Ray Reconstruction
No
No
Low Latency
NVIDIA Reflex
Standard
💾

Video Memory (VRAM)

The GeForce GTX 660 Ti has 3 GB of VRAM, while the Tesla K20m carries 2 GB. GeForce GTX 660 Ti gives you 50% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is 192-bit on the GeForce GTX 660 Ti and 64-bit on the Tesla K20m. L2 Cache: 0.38 MB (GeForce GTX 660 Ti) vs 1.25 MB (Tesla K20m) — the Tesla K20m has significantly larger on-die cache to reduce VRAM reliance.

FeatureGeForce GTX 660 TiTesla K20m
VRAM Capacity
3 GB+50%
2 GB
Memory Type
GDDR5
GDDR5
Bus Width
192-bit+200%
64-bit
L2 Cache
0.38 MB
1.25 MB+229%
🔌

Power & Dimensions

The GeForce GTX 660 Ti draws 150W versus the Tesla K20m's 225W — a 40% difference. The GeForce GTX 660 Ti is more power-efficient. Recommended PSU: 450W (GeForce GTX 660 Ti) vs 350W (Tesla K20m). Power connectors: 2x 6-pin vs PCIe-powered.

FeatureGeForce GTX 660 TiTesla K20m
TDP
150W-33%
225W
Recommended PSU
450W
350W-22%
Power Connector
2x 6-pin
PCIe-powered
Length
241mm
—
Height
111mm
—
Slots
2
—
Temp (Load)
97°C
—
Perf/Watt
29.4+49%
19.7
💰

Value Analysis

At launch, the GeForce GTX 660 Ti came in at $299, while the Tesla K20m launched at $3199. On MSRP, GeForce GTX 660 Ti was 90.7% cheaper ($2900 less). Performance per dollar on MSRP (G3D Mark / MSRP): 14.8 (GeForce GTX 660 Ti) vs 1.4 (Tesla K20m) — the GeForce GTX 660 Ti offers 957.1% better value. The newer card here is Tesla K20m (2013 vs 2012).

FeatureGeForce GTX 660 TiTesla K20m
MSRP
$299-91%
$3199
Performance per Dollar
14.8+957%
1.4
Codename
GK104
GK110
Release
August 16 2012
January 5 2013
Ranking
#472
#470
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