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GeForce GTX 660 Ti vs Tesla K20c

CPUCPUGPUGPU
NVIDIA

GeForce GTX 660 Ti

2012Core: 915 MHzBoost: 980 MHz
Buy on Amazon
VS
NVIDIA

Tesla K20c

2012Core: 706 MHz
Buy on Amazon

GeForce GTX 660 Ti vs Tesla K20c 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 K20c
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 K20c: 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.
  • ✅Measures 241mm instead of 267mm, a 26mm shorter card that is more SFF-friendly.

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 K20c

2012

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.
  • ❌2012 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 K20c 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 K20c still makes more sense if max raw gaming performance matters more than value.

GeForce GTX 660 Ti vs Tesla K20c 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 K20c

The Tesla K20c is manufactured by NVIDIA. It was released in November 12 2012. 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 K20c 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 K20c uses Kepler, both on a 28 nm process. Shader units: 1,344 (GeForce GTX 660 Ti) vs 2,496 (Tesla K20c). Raw compute: 2.634 TFLOPS (GeForce GTX 660 Ti) vs 3.524 TFLOPS (Tesla K20c).

FeatureGeForce GTX 660 TiTesla K20c
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 K20c leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.

FeatureGeForce GTX 660 TiTesla K20c
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 K20c 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 K20c. L2 Cache: 0.38 MB (GeForce GTX 660 Ti) vs 1.25 MB (Tesla K20c) — the Tesla K20c has significantly larger on-die cache to reduce VRAM reliance.

FeatureGeForce GTX 660 TiTesla K20c
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%
🖥️

Display & API Support

DirectX support: 12 (FL 11_0) (GeForce GTX 660 Ti) vs 11_0 (Tesla K20c). Maximum simultaneous displays: 4 vs 0.

FeatureGeForce GTX 660 TiTesla K20c
DirectX
12 (FL 11_0)+9%
11_0
Max Displays
4
0
🔌

Power & Dimensions

The GeForce GTX 660 Ti draws 150W versus the Tesla K20c's 225W — a 40% difference. The GeForce GTX 660 Ti is more power-efficient. Recommended PSU: 450W (GeForce GTX 660 Ti) vs 350W (Tesla K20c). Power connectors: 2x 6-pin vs PCIe-powered. Card length: 241mm vs 267mm, occupying 2 vs 2 slots.

FeatureGeForce GTX 660 TiTesla K20c
TDP
150W-33%
225W
Recommended PSU
450W
350W-22%
Power Connector
2x 6-pin
PCIe-powered
Length
241mm
267mm
Height
111mm
—
Slots
2
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 K20c 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 K20c) — the GeForce GTX 660 Ti offers 957.1% better value.

FeatureGeForce GTX 660 TiTesla K20c
MSRP
$299-91%
$3199
Performance per Dollar
14.8+957%
1.4
Codename
GK104
GK110
Release
August 16 2012
November 12 2012
Ranking
#472
#549
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